Glossary of mycology

This glossary of mycology is a list of definitions of terms and concepts relevant to mycology, the study of fungi. Terms in common with other fields, if repeated here, generally focus on their mycology-specific meaning. Related terms can be found in glossary of biology and glossary of botany, among others. List of Latin and Greek words commonly used in systematic names and Botanical Latin may also be relevant, although some prefixes and suffixes very common in mycology are repeated here for clarity.

A
a-: Prefix meaning "without" or "not".

aboospore: An asexually-produced (parthenogenetic).

abrupt: Terminating suddenly; appearing to be cut off transversely; truncate. For example, the of some Hohenbuehelia has this characteristic.

abscission: Separation, such as a spore detaching from a sporogenous cell. From Latin abscissio, breaking off.

abstriction: A method of spore formation in fungi characterized by abjunction and then abscission. Spores are produced in a sporogenous filament. In abjunction, they are then separated by transverse walls or septa, with the result spores are grouped in short chains. In abscission, successive portions are cut off and released.

acidophilous: Organisms that can grow in high-acidity environments; in mycology, lichens that can grow in peaty soil or on acidic tree bark.

acropetal: A chain of conidia where new spores are formed at the apex, with the oldest at the base. Compare with.

acropleurogenous: PSM_V09_D429_Tricothesium_roseum.jpg Formed at the apex and along the sides; e.g. conidia of Trichothecium.

adiaspore: Conidium of Emmonsia parva. A large spore that increases notably in size, but does not divide. Upon being inhalted in the lungs of humans and animals, can cause adiaspiromycosis disease. From Gr. a-, without, dia, separating.

adnate: Adhering; attached to the throughout its width, esp. of or tubes. Compare with.

aero-aquatic fungi: Aquatic fungi that grow in water, but spread their spores via air.

aethalium: The relatively large of many s (Myxomycetes). From Gr. aíthalos, soot.

agaric: Plaatjezwam.jpg A member of the order Agaricales; a or toadstool. Contains many iconic and highly studied fungi. Agarics have a macroscopic (human-visible) basidioma with a clearly differentiated  (stalk),  (cap), and  (gills) on the underside of the pileus.

algicolous: Living on algae.

amerospore: A single-celled, non-septate cell in ; compare with and.

anamorph: An asexual state of a fungus, characterized by the presence of and the absence of sexual s.

anastomosis: Fusion between branches of hyphae to make a network.

annellidic: Scopulariopsis brevicaulis.jpg'', its annellides, and the ring-shaped annellations emanating from them.]] A type of conidiogenesis. The conidiogenous cell (also called an annellide) produces a sequence of conidia called annelloconidia or annellospores. The distal end is marked by ring-shaped bands called annellations. Examples include many, Venturia inaequalis, and Microascus brevicaulis.

annular: Ring-like; an arrangement in the style of a ring. Resembling an.

annulus: A ring-like covering around the after expansion of the.

antheridium: The male sexual organ (gametangium) of fungi. Produces either antherozoids (flagellate gametes or sperm) or gametic nuclei.

apical: At the tip or end (apex).

apiculus: A short projection at the end of a spore.

aplanospore: A non-motile asexual spore in some, contained in or cylindrical. From Gr. planos, roaming.

apodial: Having no stem or, such as a lacking a and directly attached to the. Found in sporangia of Perichanea for example. From Gr. podos, foot.

apothecium: A type of that, at maturity, opens to expose the of ; commonly assumes shape of a cup or saucer. The is sometimes lichenized. From Gr. apotheke, storehouse.

apophysis: A swelling or a swollen. Associated with the swollen end of a in Mucorales or the protuberance found beneath the sporocarp of some fungi, especially Protosteliales.

appressed: Flattened, or closely applied; e.g. of scales or fibers.

appressorium: A swelling at the end of a or other hypha that adheres to the surface of its host and penetrates it with infection hyphae. Characteristic of plant pathogenic fungi such as Phytophthora and Colletotrichum, as well as parasites of animals such as Entomophthora.

aquatic fungi: Fungi that live in water. Sometimes subdivided into freshwater-living fungi and marine fungi for saltwater-living fungi. Freshwater fungi include: Many zoosporic fungi of Chytridiomycota, Chytridiales, and Saprolegniales; some lichens of Lichinaceae that live on submerged rocks; aquatic hyphomycetes or Ingoldian fungi, a group of  that live in freshwater with branched or sigmoidial spores, often growing on dead leaves in streams; s of aquatic plants; and certain s.

archicarp: The cell, hypha, or coil of Ascomycetes that later becomes the, or part of it.

ardella: A small spot-like, as in the lichen Arthonia. From Latin ardere, to sprinkle.

areola: A delimited space on a surface, separated from others by fissures or cracks.

arthric: A method of conidiogenesis that converts a hyphal element into a (also called an arthrospore), fragmenting the hypha. Common in many. Compare with. From Gr. arthron, joint.

asc-: A prefix meaning sac, bladder, or ascus. From Gr. askós, vessel, bag, or wineskin.

ascoma: The -bearing of Ascomycetes.

Ascomycota: Rhizopogon rubescens.jpg from a Rhizopogon, one of the ascomycetes.]] A phylum of fungi characterized by the presence of an, a sac-like structure where ascospores are produced. The largest group of fungi. Includes cup fungi or ; most s; the part of most lichens; powdery mildews; and fungi that produce s.

ascospore: Spores formed in the developing ascus, generally as a result of (nuclear fusion) followed by meiosis. Commonly, four haploid daughter nuclei divide to make eight haploid nuclei, around which eight ascospores are created by depositing wall material around them, a process sometimes called free cell formation.

ascus: The reproductive cell of ascomycetes; where ascospores form and are contained. While sometimes traditionally restricted to only sexual reproduction, purely asexual have since been classified as having asci as well (List of mitosporic Ascomycota).

assimilative: Hyphae related to growth, nutrition, and asexual reproduction as opposed to sexual reproduction; the.

autochthonous: Indigenous, especially to a type of soil or earth. Continuously active, as opposed to organisms that only become active when a suitable substrate becomes available such as yeasts.

azygospore: A spore close in form to a, but developed asexually (parthogenesis). Found in many species of Mucorales and some species of Entomophthorales, such as Entomophthora muscae. The structure that contains it is called an azygosporangium.

B
ballistospore: A forcibly discharged ; the most typical kind. Compare with. From Latin ballista.

basidioma: Basidium schematic.svg, and basidia]] A basidium-producing organ; the of Basidiomycota.

Basidiomycota: Lactarius indigo 48568.jpg'', a milk-cap mushroom and basidiomycete.]] A phylum of fungi. Generally defined by sexual reproduction via basidiospores formed from a basidium, although a few purely anamorphic basidiomycetes exist. Typically mycelial, although some are yeasts and some are. Basidiomycetes include earth balls; earthstars; false s; ; many s; polypores; s; most s; most s; and stinkhorns.

basidiospore: A propagative sexual spore produced on a basidium, typically following karyogamy and meiosis, typically containing one or two haploid nuclei.

basidium: A cell or organ where basidiospores are produced, generally four. Basidia are characteristic of basidiomycetes. From Greek basis, base.

basipetal: A chain of conidia in which new spores are formed at the base and the oldest are at the apex. Compare with.

blastic: One of the two basic forms of, with conidiogenesis. Characterized by the enlargement of the conidia initial before it is delimited by a septum. In holoblastic, both inner and outer walls of the blastic conidiogenous cell contribute to the formation of the conidium; in enteroblastic, only the inner walls enlarge and contribute. Monoblastic is from a single conidiogenous locus; polyblastic is when a conindiogenous cell has multiple conidiogenous loci.

blastospore: An asexual spore that forms by. One of the conidia types that can be produced in conidiogenesis. Examples include yeasts such as Candida glabrata and Kloeckera, and the plant pathogenic Monilinia and Cladosporium mold.

bolete: An iconic variety of mushroom characterized by fruit bodies and a poroid (marked by s rather than the gill-marked cap of s). They are often edible. Boletes are members of the order Boletales.

budding: A type of asexual cellular multiplication. A small outgrowth or bud from a parent cell enlarges and eventually separates from the parent cell. Typical in s and many s. Sometimes divided by how many buds are made, with monopolar, bipolar, and multipolar budding for one/two/many respectively.

bulbil: A compact multicellular, with its thin-walled, undifferentiated cells produced in succession from the hyphae. Superficially resembles plant tissue at maturity such as raspberries, hence the resemblance to bulbils in botany. Found in certain basidiomycetes; characteristic of such as Bulbillomyces farinosus, where they grow on leaves or tree branches previously submerged in water.

C
capitulum: The stalked, globose, apical of lichens of the order Caliciales.

carp-: Combining forms meaning "fruit". From Gr. karpós, fruit.

capsule: A clear, gelatinous covering or sheath around the cell wall of certain yeasts, e.g. Cryptococcus, and some s such as those of Sordaria fimicola.

catenate: Arranged in chains or end-to-end series. Catenulate is the diminutive form for small chains. From Latin catena, a chain.

chitin: A nitrogen-containing polysaccharide found in many fungal cell walls, generally as part of a chitin-glucan complex. From Gr. chiton, tunic.

Chitomycetes: An obsolete division of fungi, meaning possessing mycelium; subsumed by in later literature.

chitosome: A small spheroidal organelle in many fungi that synthesizes chitin using chitin synthase zymogen, to use for cell wall synthesis.

chlamydospore: C albicans en.jpg'', including a chlamydospore.]] An asexual thick-walled spore developed from hyphae, generally for perennation rather than dissemination. From Gr. chlamys, cloak, -ydos, spore.

Chytridiomycota: A phylum of fungi. Informally known as chytrids. Characterized by chitinous cell walls and reproduction via s, which are usually uniflagellate in the posterior although rarely polyflagellate. Many are s that live in freshwater (see ) or the soil.

cirrus: A curl-like tuft; usually refers to a tendril-like mass of forced-out spores.

clamp connection: Clamp connections fungi.svg A hyphal outgrowth that makes a connection during cell division between the resulting two cells by fusion. Generally associated with mycelium of.

clavate: Narrowing at the base and then thickening; club-shaped.

cleistothecium: A closed that has no pre-defined opening; opens by rupture. Seen, e.g., in ascoma of Thielavia or in Erysiphales.

Coelomycetes: An artificial taxon for with pycnidial and acervular states, i.e. they form their spores in an internal cavity. From Gtk. koilos, hollow.

coeno-: Prefix meaning "multinucleate". From Gr. koinós, shared or in common.

coenocytic: Hyphae that lack and are multi-nucleate; seen in and. From Gr. kytos, cell. Distinct from a, a multinucleate structure resulting from fusion of protoplasts.

colony: A massed group of hyphae and spores of a single species, especially if all are grown from a single spore (e.g. in a lab).

columella: A sterile central axis within a (sporocarp) or.

complicate: Bent or folded on itself. From Latin plicare, to fold.

conidiogenesis: The process of producing. Subdivided into and  conidiogenesis.

conidiogenous: Producing. Generally used as "conidiogenous cell", fertile cells that produce conidia; or "conidiogenous locus", for the particular point on a hypha or a cell where conidia are generated.

conidioma: Any multi-hyphal, -bearing structure. An umbrella term that includes various traditional conidia-bearing structures such as a, a sporodochium, an acervulus, or a.

conidiophore: A specialized hypha bearing or consisting of conidiogenous cells upon which develop.

conidium: A thin-walled, asexual spore borne on specialized hypha known as s. From Gr. konidion, diminutive of konis (dust).

cortex: A thick outer-covering or rind, generally of a. From Latin cutus, bark.

cortina: Cortinarius claricolor 01.jpg claricolor'']] Of s, the remnants of the, frequently web-like, that covers mature gills. Thin and evanescent; eventually breaks up and disappears.

crozier: The hook of an ascogenous hypha before development of the ascus.

cruciate: In the form of a cross.

crustose: Crust-like or having a hard surface layer, e.g. in a sporocarp; in lichens, a thallus firmly fixed to the substratum by the whole of their lower surface, generally lacking a distinct lower cortex.

cyphella: A break in the lower cortex of a lichen thallus which appears as a cup-like structure or marking. Characteristic of Sticta. From Gr. kyphella, the hollow of an ear.

cyst: A sac or cavity. A protected by a resistant cell wall; seen in "lower fungi" such as aquatic and Amoebidiales.

cystidium: A large, sterile cell on the surface of a, particularly the from which it frequently projects.

D
dentate: Toothed, e.g. of s.

denticle: A small, tooth-like projection, especially one on which spores are borne.

dermatophyte: A parasitic fungus that focuses on tissue with keratin (skin, hair, nails) of humans and animals. Associated with the genera Epidermophyton, Microsporum, and Trichophyton.

dermatophytosis: Toplin des dieles tiesse vea.jpg.]] The skin condition caused by a dermatophyte infection.

dichotomous: Forking into roughly equal pairs, often repeatedly, e.g. in hyphal branching. Compare with.

dictyospore: Spores Amerospore Didyomospore Phragmospores Dictyospore.png Divided by intersecting septa in more than one plane, both transverse and longitudinal; a spore. Found in Alternaria alternata as an example.

didymospore: A two-celled spore divided by a single septum. Usually applied to mitosporic fungi. Compare with and.

Dikarya: A subkingdom of Fungi that includes Ascomycota and Basidiomycota, or "higher fungi."

dikaryotic: A single cell (dikaryon) having two genetically distinct haploid nuclei.

dimorphic: Having two forms, e.g. both yeast and mycelial forms. Examples include Histoplasma and Sporothrix.

diplanetism: A life cycle with two types of zoospores (dimorphic), primary and secondary.

Discomycetes: A class of saucer-shaped and cup-shaped Ascomycetes in which the hymenium is exposed at maturity; one in which the fruit body is an apothecium (discocarp). Prominent members include Pezizales, Helotiales, Ostropales, and Lecanorales.

disjunctor: An connective, consisting of either a cell or cell wall material. It develops through the pores of septal lamellae of adjoining conidia in a chain, before later fragmenting and releasing the conidia.

dolipore septum: Parenthesome miguelferig.jpg (1) "cap" a dolipore septum (2). The cell wall (3) swells around the septal pore to form a barrel-shaped ring. Perforations in the parenthesome allow cytoplasm to flow between (4) and (5).]] A found in Basidiomycetes that flares out in the middle to form a channel.

E
echinate: Having sharply pointed spines, e.g. of spores. Its diminutive is echinulate, for delicate spines. Sometimes synonymous with. From Gr. echinos, hedgehog.

effete: Past the bearing period; overmature, e.g. a fruiting body that has emptied its spores.

effuse: Expanded; stretched out flat, e.g. a film-like growth. From Latin fundere, to pour.

elf cups: Helvella leucomelaena MO.jpg''.]]Ascomata of Pezizales. Scarlet elf cup: An ascoma of Sarcoscypha coccinea. Green elf cup: Ascomata of Helotiales, such as Chlorociboria.

endo-: Prefix meaning "inner" or "inside", from Gr. éndon.

endobiotic: Growing within anther living organism.

endophyte: An organism that lives within a plant; in mycology, specifically fungi that live within plants but do not show external signs or damage to the plants. This is usually endomycorrhizial fungi in root systems and asymptomatic fungi in aerial plant parts

endospore: An endogenous spore, e.g. a sporgangiospore, often resembling an ascospore. The innermost wall of a (endosporium).

endothrix: Living within hair. Generally associated with parasitic dermatophyte infections.

epibiotic: Growing on the outer surface of another organism.

epicortex: A thin layer on top of the ; e.g. a sugar-like layer over some Parmeliaceae lichens or a layer on the of some Pezizales

erect: Upright; not curved.

ergot: Rogge moederkoren Claviceps purpurea on Secale cereale.jpg-infested rye of the fungus Claviceps purpurea.]]A disease of cereals and grasses caused by the fungus Claviceps. The ergot fungus itself, or its.

erumpent: Breaking through the surface of the substratum.

ethnomycology: The study of the use of fungi by human cultures.

evanescent: Having a short existence; soon disappearing, e.g. of a veil, an annulus, etc. From Latin evanscere, to disappear.

eucarpic: where reproductive structures only develop on limited portions during fructication. The rest of the thallus remains in its original assimilative function. Compare. If they have one, they are monocentric; if they have several sporgangia, they are polycentric. The vast majority of fungi are eucarpic.

Eumycota: Fungi. From Greek for "true fungi". Generally used to distinguish fungi from related traditionally also studied in mycology, as well as recently separated sister organisms such as. The four traditional phyla of (true) fungi are Ascomycota, Basidiomycota, Chytridiomycota, and Zygomycota; Glomeromycota and Microsporidia have split off more recently.

exobasidial: With exposed. Separated by a wall from the basidium.

exochthonus: Invasive, not indigenous; especially for organisms not adapted to a particular soil.

F
fairy ring: Fairy Ring 0004 (cropped).JPG.]] Mushrooms or puffballs forming in a circle, started from a central in the soil. Fairy rings expand with time if undisturbed, and are generally associated with.

falcate: Curved, like a sickle or scythe. From Latin falx and falcis, sickle.

fermentation: Stefano Lubiana Pinot Noir ferment vintage 2010.jpg grapes being fermented by yeasts in winemaking.]] A chemical change caused by enzymes of living organisms. In mycology, typically yeasts and molds performing anaerobic breakdowns such as changing carbohydrates to carbon dioxide and alcohol. Part of the creation of fermented foods and fermented drinks (most notably alcoholic beverages).

filament: A fine thread. Commonly used for hyphal threads or other simple thread-like fungal structures. From Latin filum, thread.

filamentous: 1. Thread-like, or composed of filaments. In lichens, when the photobiont forms in threads surrounded by hyphae of the mycobiont; the fungi forms the outer structure. (e.g. Coenogonium, Cystocoleous, Racodium)

filiform: In the shape of a thread; thin.

fleshy: Soft, not cartilaginous or wood-like. Associated with agarics and boletes.

flexuous: Wavy. From Latin flexus, bend.

flocci: Cotton-like groups or tufts.

floccose: Fluffy or cottony; byssoid. Common among many colonies of fungi. Its diminutive form is flocculose, for a small and delicate floccose element. From Latin floccus, a tuft of wool.

flowers of tan: The of Fuligo septica. Commonly found in tannin-containing tubs drying hides into leather.

flush: The rapidly growing stage of a mycelium, especially in mushrooms.

foliicolous: Living on leaves.

foliose: Leaf-like in form. Of lichens, foliose lichens, characterised by flattened leaf-like thalli.

foot cell: 1. A hyphal cell that supports a sporogenous cell or thallus, specifically the support of the conidiophore in Aspergillus and the macroconidium of Fusarium. The thallus in the aquatic fungi of Blastocladiales.

foxfire: PanellusStipticusAug12 2009.jpg'', an example of luminiscient fungi (long exposure photograph).]] A phosphorescent light emitted by moist, decaying wood; one of the most famous forms of fungal bioluminescence.

free: Not adhering; not attached to the, esp. of or tubes. Compare with.

frog cheese: A young puffball.

fructicolous: Living on fruit. From Latin fructus, fruit.

fruticolous: Living on shrubs. From Latin frutex, shrubs.

fungicide: A substance able to kill fungi, especially at low concentration. From Latin caedere, to kill. Generally used for chemical substances rather than heat, light, radiation, etc. which are called sterilization instead.

fungicolous: Living on other fungi.

fungiform: Mushroom-shaped.

fungivorous: Amanita amerimuscaria 126174.jpg feeding on Amanita. Many animals are opportunistic fungivores and eat fungi if available, but only a few near-exclusively target them.]] Fungus-eating.

fungoid: Similar to a fungus in texture or morphology.

fungus: A kingdom of organisms in Eukaryota. Fungi are distinguished based on their morphology, nutritional modes, and ecology. Typical traits are that they lack plastids, are osmotrophic (absorb nutrients from their environment), are never phagotrophic, lack an ameboid pseudopodal phase, cell walls are composed of a chitin-glucan complex, mitochondria have flattened cristae and perioxomes are nearly always present, and are mostly non-flagellate; flagella when present lack mastigonemes. From Gr. sphongos, σπόγγος, sponge.

funicular: Cord-like. From Latin funis, rope.

funiculose: (Of hyphae) Aggregated into cord-like strands.

fusiform: Spindle-shaped; narrowing toward the ends. Of spores,,, etc. From Latin fusus, spindle.

fusoid: Somewhat.

G
galeate: Hooded; hat-shaped. From Latin galea, helmet.

gamete: A sexual cell; a uninucleate haploid reproductive cell capable of fusing with another. From Gr. gámos, marriage, union.

gemma: 1. Another term for s, sometimes restricted to specifically spores that broke free from the to be dispersed, often via water. From Latin gemma, "jewel" A bud or propagule produced by, as in s.

geniculate: Bent like a knee.

geophilous: Preferring an environment in soil, as in Microsporum cookei or fungi that produce s.

germ pore: A hole in a, frequently, through which it germinates. s emerge through it. Associated with s.

germ sporangium: A sporangium at the end of a germ tube. Originates by germination of an or of a zygosporangium.

germ tube: C albicans germ tubes.jpg forming in Candida albicans, at 600x magnification.]] A short hypha that sprouts from the during germination. If conditions are favorable, will form a full. In plant pathogenic fungi, forms an, from which the infective hypha spread and penetrate the tissues of the host.

glabrous: Smooth, not hairy; e.g. of the surface of a or.

gleba: The central, internal portion of the of Gasteromycetes and underground Pezizales.

globose: Spherical in shape.

guttate: Having tear-like drops. From Latin gutta, drop. Spotted as if stained by drops of liquid, e.g. of a.

guttulate: Spores bearing one or more guttules (oil-like drops) inside, e.g. the ascospores of Podospora comata.

guttule: A small drop or drop-like particle, especially oil-like globules in a spore resembling a nucleus.

Gymnomycota: An obsolete division of fungi, characterized as having a. Subsumed by (true slime molds) in later literature.

gymnothecium: An in which the is in a loose  network.

gyrate: Curved; folded and wavy, like a brain.

H
hamate: Hooked.

hamathecium: Collective term for hyphae and tissues between asci; interascal tissue.

haustorium: Hyaloperonospora-parasitica-hyphae-haustoria.jpg infiltrating cells of the plant Arabidopsis thaliana, at 400x magnification. The stained dark blue spheres are the haustoria.]] A branch for absorption of food. It penetrates the wall of the living host cell. Found in certain parasitic fungal plant pathogens, such as Phytophthora.

heterokaryotic: Having two or more genetically distinct nuclei in a common cytoplasm, making a combined cell.

heterokont: 1. A grouping of organisms within Chromista that includes. Having cilia or flagella of unequal length. A condition where a flagellum possess two rows of tripartite tubular hairs.

heteromerous: In lichens, when the thallus is stratified. The photobiont is distributed in a compact layer, and the hyphal tissue of the fungi are separated into an outer rind and an inner stratum. From Gr. hetero, different, and meros, part.

heterothallism: Fungi that require the interaction of two different for sexual conjugation to occur.

hilum: A scar after a spore is discharged; was previously the point of attachment of a basidiospore to the. From Latin hilum, mask.

hoary: Covered thickly with silk-like hairs, especially of a or, often grayish or white.

holocarpic: Having all of the thallus converted into the fruiting body at the end of maturation; compare. The somatic and reproductive phases do not coexist as a result. Examples include Olpidiaceae and Synchytriaceae.

holomorph: Term describing the whole fungus throughout all its morphs (states, phases). Generally includes a single phase and one or more  phases.

holothallic: A method of conidiogenous in which a hyphal element is converted as a whole into a single conidium. All the cell wall layers are involved. Compare with. From Gr. holos, whole.

homoiomerous: In lichens, when the photobiont is are distributed uniformly or at random throughout the thallus. From Gr. homoios, similar.

homokaryotic: Having genetically identical (or near-identical) nuclei, e.g. in a.

homothallism: The condition where sexual reproduction can occur in a single, without the interaction of two separate thalli.

hydrophilous: Preferring an aquatic habitat. Common among zygomycetes, as s rely on water to move.

hygrophilous: Preferring a moist habitat. Common among fungi.

hygroscopic: Becoming soft in wet air, hard in dry; readily absorbing moisture from the atmosphere. (of a sporocarp) Opening and discharging spores in dry air.

hymenium: The spore-bearing fruiting surface of Ascomycetes and Basidiomycetes. An aggregation of asci or basidia in a layer (palisade) mixed with other sterile cells.

hymenophore: The portion of a basidioma or ascoma bearing the.

hypha: Rhizoctonia hyphae 160X.png'' hyphae]] A single of a. From Gr. hyphe, weaving.

hyphal: Of, or pertaining to, a.

Hyphomycetes: An artificial class of that reproduces asexually. Traditionally subdivided into Agonomycetales, Hyphomycetales, Stilbellales, and Tuberculariales.

hypnospore: A thick-walled resting spore; germinates only after a lapse of weeks or months. From Gr. hypnos, sleep.

hypo-: Prefix meaning "under" or "lower". From Gr. hypo.

hypothallus: 1. (Of lichens) The first growth of the, before differentiation has taken place. Usually of a crustaceous lichen's earliest stage, lacking a and. Often persists as a colored layer on the bottom of the later stages of maturation. (of slime molds) a thin layer on the surface not used up in sporangial development.

I
inoperculate: Not operculate; lacking an. Generally refers to or  that discharge spores by an irregular apical opening or pore instead. Found in various and most other ascomycetes.

intercalary: (of growth) Between the apex and the base; not apical. From Latin intercalare, to insert. (of cells) Between two cells.

isidium: A for growth; can both increase the surface area of a lichen and become detached from the thallus to disperse the lichen. Isidia are structures larger than, and contain both the and the. They are usually cylindrical, but can also be, , and other shapes.

isokont: s with flagella of roughly equal length. Seen in Ectrogella bacillariacearum and other aquatic zoosporic fungi. From Gr. kontos, a pole.

J
jelly fungus: Fungi of the Tremellales or trembling fungi. Known for having a soft, elastic consistency, similar to gelatin or jelly.

K
kary-: A prefix meaning "nucleus." From Gr. karyon.

karyogamy: The final stage in the fusion of two sexual nuclei, after plasmogamy, that forms the nucleus, but before meiosis.

kinetosome: An organelle that is the base of a flagellum. Connected to the nuclear membrane by means of a rhizoplast. Found in Blastocladia and Rhizophydiales, for example.

L
lageniform: Flask-shaped; swollen at base, narrowed at top.

lamella: A gill; a -covered vertical plate, generally of an. Attaches to the in a variety of ways, including:, unattached;, attached; adnexed, a partial attachment; sinuate, similar to adnate but with an S-shaped curve; decurrent, attached and also running further down the surface of the stipe. From Latin lamina, a thin plate.

lamellate: Having lamellae (gills). Made up of thin plates.

lanate: Like wool; covered with short-hair-like elements.

lateral: At the side, e.g. of a.

latex: A milk-like juice that flows from some fungi when cut or damaged, as in Lactarius.

latticed: Cross-barred. (See also Clathrus, lattice-work fungus, especially Clathrus ruber.)

lenticular: Shaped like a double convex lens.

lepidote: Covered in small scales; for example, the of Lepiota.

lichen: Crustose lichen William St Brisbane P1150112.jpg can grow on surfaces hostile to most other lifeforms, such as concrete walls and bare boulders.]] A dual organism that arises from an association of (mycobiont) and algae or cyanobacteria (photobiont). The two coexist in a mutualistic relationship as partners; the resulting lifeform differs markedly from its isolated components.

lichenicolous fungi: Fungi dwelling on or in lichens.

lichenicolous lichens: Lichens which grow on or in other lichens.

lichenin: A polycarbohydrate found in wall of the hyphae of many lichen-forming fungi, most characteristically Iceland moss.

lichenoid: Resembling a lichen.

lichenology: The scientific study of lichens.

lichenometry: Landkartenflechte Rhizocarpon geographicum Valais1.jpg A technique for studying the exposure age of rock surfaces based on the size and diameter of thalli. Used extensively in glaciology. Most frequently uses map lichen for dating. Lichenometry has been used to date Easter Island moai among other elements.

ligneous: Fomes fasciatus - Flickr - Dick Culbert.jpg'' on a tree.]] Wood-like; having the consistency of wood, such as the fruiting body in Fomes, Ganoderma, or other Aphyllophorales.

lignicolous: Living in or on wood, although not necessarily deriving nourishment from it, as do wood-decay fungi.

limoniform: Lemon-shaped.

lunate: Crescent-shaped, like a crescent moon. Sometimes synonymous with. From Latin luna, moon.

lumen: The central cavity of a structure, usually referring to a cell bounded by tissue or cell walls.

luminescent fungi: PanellusStipticusJuly5 2010 cropped.jpg'' displaying bioluminescence]] Fungi that exhibit bioluminescence, emitting light in certain conditions.

M
macroconidium: In fungi with multiple types of, the larger; compare, mesoconidia.

Macromycetes: Large fungi with visible s, such as mushrooms.

macronematous: Having a morphologically different from the hyphae; a specialized conidiophore.

maculate: Spotted; blotched.

mantle: Ectomycorrhiza illustration.jpg.]] A layer of covering the roots of ectomycorrhizal plants, generally trees. Connected to a Hartig net on the inside, and extramatrical hyphae on the outside.

matrix: The substance in or on which a fungus grows. The mucilaginous material in which and some ascospores are produced.

marginal veil: In s and s, a proliferation of on the edge of the that protects the developing.

medicinal fungi: Cetraria islandica tablets.jpg'' (Iceland moss)]] The use of fungi such as yeast in medicines.

meiosis: A series of two successive nuclear divisions that reduces the number of chromosomes by one-half, going from a diploid state to a haploid one. The last part of the in many fungi, following  and. Contrast with.

merosporangium: A that is a cylindrical outgrowth from the swollen tip of a. A chain-like row of sporangiospores are produced there. Characteristic of Mucorales; also found in some other zygomycetes.

microbiota: All of the microorganisms present in an area, including algae, bacteria, protozoa, and fungi. Compare.

microconidium: In fungi with multiple types of, the smaller; compare, mesoconidia.

micronematous: 1. Having of small diameter. Having conidiophores similar morphologically to vegetative hyphae.

mildew: UncinulaNecatorOnGrapes.jpg'', a powdery mildew that grows on grapes.]] Fungi that grow on host plants. Subdivided into powdery mildew ("true"), downy mildew ("false"), and dark mildew. The plant disease caused by such fungi.

mitosis: The normal division of a nucleus. Results in two child nuclei with the same number of chromosomes as the parent.

mitosporangium: A thin-walled sporangium of certain Blastocladiales producing uninucleate diploid s (mitospores) by mitosis.

mitospore: A from a. From Gr. mitos, thread.

mitosporic fungi: Purely asexual fungi that reproduce by mitosis.

mold: A fungus of very small size, usually with microscopic s.

monokaryotic: Cells having a single nucleus each; having genetically identical haploid nuclei (monokaryon or haplont). Found, for example, in the mycelium of Agaricales.

monopodial: A type of branching where there is a persistent main axis from which branches split from, one at a time, often in alternate or spiral series. Often uses succession. Compare with.

morph: Form. From Gr. μορφή, morphḗ, form.

moss: Caribou moss.jpg or caribou moss, which is truly a lichen.]] Flowerless plants; not fungi. However, some lichens were given misnomers in the past that misidentified them as mosses, including oakmoss, Swedish moss, dyer's moss, Iceland moss, beard moss, and reindeer moss.

motile: Independently mobile.

mucilaginous: Sticky or viscous when wet; slimy. Present in many fungi and especially slime molds.

mucoid: Like mucus, having the consistency of mucilage; slimy.

Mucoromycota: A division of fungi broken off from in the 2010s that includes many of the s, microscopic fungi. Includes Mucorales, the largest and most closely studied order of zygomycetes.

multiseptate: Having more than one.

muriform: Spores arranged like bricks in a wall; having both longitudinal and transverse septa. From Latin murus, wall.

mushroom: Amanita muscaria Marriott Falls 1.jpg'' (fly agaric), an iconic mushroom.]] Large s, or other fungi such as s. Commonly divided into mushrooms (human-edible) and toadstools (inedible).

myc-: Combining prefixes that mean "fungus". From Gr. mykēs and mykētos (μύκης), fungus.

mycelial cord: A discrete aggregation of hyphae. Compared to a, it is undifferentiated from other hyphae and has no apical meristem.

mycelium: A mass of hyphae or fungal s; the.

Mycetes: Fungi. As a suffix (-mycetes), the recommended ending for the names of fungal classes.

mycetism: Poisoning by larger fungi, usually mushrooms.

mycetoma: A fungal disease of the skin, usually of the foot.

mycobiont: The fungal part of a.

mycobiota: Aggregate fungal life in the area under consideration; equivalent of the term flora in plants or fauna in animals.

mycogenous: Coming from fungi; growing on fungi.

mycoid: Fungus-like.

mycology: The scientific study of fungi. From Gr. lógos, discourse.

mycorrhiza: 2010-09-13 Leccinum aurantiacum 6555637461 crop.jpg, a bolete that has a mycorrhizal relationship with a host tree.]] A symbiotic association between a fungus and the root system of a plant, usually trees. Traditionally subdivided into ectotrophic, where the fungus forms a sheaf on the surface of the root to create a 'Hartig net', and endotropic, where fungal hyphae directly enter the cortical cells of the root. Later, more precise divisions included ectomycorrhiza, arbuscular mycorrhiza, ericoid mycorrhiza, orchid mycorrhiza, arbutoid mycorrhiza, and monotropoid mycorrhiza.

mycosis: Fungal diseases of humans and animals (rarely, plants as well).

-mycota: The recommended ending of the name of fungal phyla.

mycotoxin: Toxins (the product of one organism injurious to another) produced by fungi. Studied by mycotoxicology. Poisonings are called mycotoxicoses.

Myxomycota: Hemitrichia serpula 57955.jpg serpula'', commonly called pretzel slime, a true slime mold.]] True slime molds. No longer categorized as fungi, but were formerly categorized as such in older literature, and still studied in mycology; now considered part of Amorphea. Since reclassified as Myxogastria. From Gr. myxa, slime.

N
nematophagous: Predatory fungi that trap, devour, and digest nematodes in the soil.

noble rot: Riesling Grapes with gray rot.jpg'' (gray rot), causing a color change.]] A condition from the mold Botrytis growing on overripe grapes. Used in the production of certain sweet wines.

O
obclavate: (of spores, stipe, cystidia, etc.) The reverse of ; widest at the base.

obpyriform: The reverse of pear-shaped or.

obovoid: The reverse of egg-shaped or ; the narrower end is on bottom.

oogonium: The female sexual organ of Oomycetes, which at maturity contains one or more s. From Gr. gonos, progeny.

Oomycota: Albugo candida.jpg'' (white rust), a water mold, on a mayflower.]] Water molds. Traditionally considered fungi, but now classed as closer to algae. Part of the Chromista kingdom. Contain cellulose in their cell walls rather than, and hypae rather than  hyphae.

oosphere: Female gamete of oomycetes; "egg" of the oogonium.

oospore: Hyaloperonospora-parasitica-hyphae-oospore-2.jpg of Hyaloperonospora parasitica, a downy mildew.]] The resting spore formed as a result of fertilization of the oosphere. Has a thick, resistant wall. Subdivided into centric, subcentric, subeccentric, and eccentric oospores by its structure.

orchil: A reddish-purple dye traditionally extracted from lichen.

operculum: A lid or cover. Usually refers to the lid-like apex of a sporangium or ascus found in some and Pezizales.

osmotrophic: Absorbing nutrients from surroundings via osmosis. True of all fungi.

ostiole: A cavity ending in a pore at the neck of a (ascocarp) of ascomycetes. Any pore by which spores are freed from a fruit body, including both the ascocarp version as well as the opening of a pycnidium.

ovoid: Egg-shaped; the narrower end is on top.

P
papilla: A small rounded elevation. Generally refers to an elevation on the wall of the which on breaking serves as the exit point of zoospores and planogametes.

paraphysis: A sterile upward-growing, basally-attached hypha in a, especially in of ascomycetes where they are generally and. The free ends frequently converge toward the and make a structure called an epithecium over the. Part of the. Has a number of minor variants distinguished by names such as paraphysoid, pseudoparaphysis, pseudophysis, dikaryoparaphysis, and hyphidium.

partial veil: Basidioma agaric veils.png A layer of tissue that joins the stipe to the edge of the pileus in s, covering the gills during development. May become an or a  after development is complete.

pectinate: Resembling the teeth of a comb, e.g. of the margin of a.

pedicel: A small or slender stalk.

pellicle: The outermost living layer. A thin film-like growth on the surface of a liquid culture, e.g. on s. (of agaric basidiomata) A delicate skin-like cuticle of the that can break off.

penicillus: An asexual conidial head in the shape of a brush. Consists of a or  that supports a cluster of conidiogenous cells (s). Characteristic of Penicillium s.

percurrent: Conidiogenous cell growth where a or grows through a preexisting pore. Of a, extending throughout the entire length, from the base of the gleba through to the peridium's apex. Found in gastromycetes such as Podaxis. Also called a stipe-columella or dendritic columella.

peridium: The outer wall of a or other. Can be either acellular or composed of plectenchyma.

perithecium: A rounded, oval ascocarp, characteristic of Pyrenomycetes and pyrenolichens. Can commonly be pyriform, obpyriform, beaked, or lageniform.

phagotrophic: Feeding by engulfing food; extending a pseudopod or other protoplasmic extension, as seen in protozoa. Never seen in true fungi, but some Pseudofungi use this in addition to osmocytosis, e.g. Myxomycetes.

phialide: A type of conidiogenous cell, bottle-shaped, that produces conidia (phialospores) in succession. The philade itself does not increase in length. The most common conidiogenous cell among conidial fungi. From Gr. phiale, jar.

phialospore: An asexual spore formed from the tip of a phialide. Formed by.

photobiont: The photosynthetic element in a. Either algae (a phycobiont) or cyanobacteria (a cyanobiont).

phototropism: A tropic phenomenon driven by light, where growth curves toward or against light stimuli. For example, sporangiphores of Pilobus and Phycomyces direct themselves toward light.

phragmospore: An asexual reproductive spore partitioned by two or more transverse septa. Most commonly found in. Compare with and.

physiological race: A group of forms alike in morphology. Often means a group of organisms that are potentially interbreeding. In plant pathology, it means a group with similar preferences in plants targeted; a race may be adapted to target only a single cultivar of a plant. Tracking the history of an organism is phylogeny. From Old Italian razza, generation.

piedra: A fungal infection of the hair, characterized by stony, hard nodules along hair shafts. A type of.

pileus: Mushroom Cap Close-up Macro PLT-FG-8.jpg The cap of that bears the fertile.

pilose: Covered with long, soft filaments; hairy. Oudemansiella pilosa is an example. From Latin pilus, hair.

plasmodium: A motile mass seen in the growth phase of acellular slime molds. Generally multinucleate and lacking cell walls. See also protoplasmodium, aphanoplasmodium, phaneroplasmodium, filoplasmodium, and pseudoplasmodium.

plasmogamy: The fusion of two cells or plasmodial cytoplasms, resulting in the nuclei juxtaposed and a formed. In many s of fungi, the first step which precedes (nuclear fusion) and meiosis.

plectenchyma: A thick, packed tissue of twisted formed during development as it enlarges and generative hyphae begin to differentiate. From Gr. plektos, to twist, and enchyma, infusion.

pleomorphic: 1. Fungi having more than one form in its life cycle, e.g. s comprising a teleomorph and one or more anamorphs. Of s, having variations, especially changes brought by degeneration over time.

pleurogenous: Growing from the sides, e.g. of hyphae.

pore: A small opening, as in conidiogenesis. The mouth of a tube in certain fungi, such as Polyporaceae and Boletaceae.

potato blight: Phytophthora infestans 5619.JPG.]] A fungal disease caused by the water mold Phytophthora infestans; cause of the Great Famine of Ireland and other potato famines.

propagule: Any structure that serves to spread the organism, both via propagation of new organisms as well as vegetatively increasing a single organism's size. In fungi, generally s, s, fragments of,, , and others.

pseudo-: Prefix meaning "false", from Gr. pseudos.

pseudoidia: Separated hyphal cells capable of germination.

Pseudofungi: A subdivision of Chromista consisting of organisms similar to fungi and traditionally studied in mycology, including Oomycota, Hyphochytriomycota, Labyrinthulomycota, and Thraustochytriales. Contrasted with, true fungi.

pseudoparenchyma: A type of plectenchyma made of tightly packed, angular or polyhedral cells.

pseudostroma: A formed of both fungal tissue and remnant tissues of a host plant.

puffball: 2012-07-01 Lycoperdon pyriforme Schaeff 232780.jpg of the species Lycoperdon pyriforme.]] Fruit body of Lycoperdales. Emits a cloud of spores when disturbed ("puffing").

punctiform: Very small (but still visible to unaided eyesight), e.g. with.

punctulate: Marked with small points.

putrescent: Decaying; becoming soft. From Latin putrescere, to grow rotten.

pycnidium: An asexual fruiting body, generally flask-shaped, lined entirely by conidiogenous cells.

pyriform: Pear-shaped.

R
rachis: A or zig-zag holoblastic extension of a conidiogenous cell from conidiogenous cell development. Such cells having a rachis are called rachiform. From Gr. ráchis, axis, spine.

racket cell: A hyphal cell having a swelling at one end, resembling a tennis racket; found in s.

ramicolous: Living on plant branches or twigs.

reniform: Kidney-like or bean-like in form, e.g. of spores. From Latin renes, kidney, or faba, a broad bean.

retorse: Turned or bent backward.

rhizoid: A slender, tapered structure of anucleate s bearing a superficial resemblance to a plant root, as it is extended by the thallus of as a feeding organ. Generally part of a root system-like aggregation of branched hyphae.

rhizomorph: A strand or cord of mycelium, often with a dark-colored rind surrounding a central core of colorless cells, penetrating a soft substratum or between portions of it (e.g. between bark and wood). Unlike a mycelial cord, features distinct tissue, unlike "normal" hyphae. Functions as organ of absorption of nutritive substances. Seen in some Agaricales and Gasteromycetes.

rhizomycelium: A branched system of s that resembles a mycelium in.

Rozellida: A sister group of quasi-fungi that lack chitinous cell walls. Traditionally considered, but have since been separated and reclassified in the 2010s. Phagotrophs rather than osmotrophes. Rozella, a group of obligate endoparasites, is possibly the earliest diverging lineage of fungi.

ruderal: Living in wasteland, ruins, or debris. Fungi having a high growth rate, rapid germination of spores, and short life expectancy.

rugose: Wrinkled. Seen, e.g., in basidiospores of Panaeolina foenisecii. From Latin ruga, wrinkle or crease.

rust: Endophyllum euphorbiae-sylvaticae 135015352.jpg Plant diseases caused by fungi of the order Pucciniales. A fungus of the Pucciniales.

S
saprobe: An organism that uses dead organic material as food.

saxicolous: Growing on rocks (e.g. Lichenothelia).

scabrous: Rough.

scariose: Thin, papery.

sclerotium: Sclerotinia sclerotiorum sclerortia.jpg'' sclerotia]] A hardened, often rounded, mass of hyphae, normally having no spores. May give rise to a fruit body, a stroma (as in ergot), conidiophores, or mycelium. Can be a store of nutrients as part of perennation; can reinitiate vegetative growth after conditions have improved and a season has passed.

scutate: Like a shield or round plate in shape. From Latin scutum, shield.

secotioid: A fruiting body with the appearance of an unopened or. The margin of the does not break free of the columella-stipe, generally seen in vertical development (e.g. Podaxis pistillaris).

seminicolous: Living in seeds; seed-borne fungi. Examples include Ascochyta pisi, Colletotrichum lindemuthianum, Microdochium panattonianum, and others.

semimacronematous: Having a slightly morphologically different from the hyphae.

senescence: Growing old. From Latin senescere, to grow old. The degeneration over time that makes indefinite propagation of certain fungi cultures impossible, especially in isolation such as a lab environment.

septate: Having septa; divided by partitions.

septum: A cell wall in a.

serrate: Edged with teeth, like a comb or saw, e.g. of gills; its diminutive form is serrulate.

sexual phase: The phase of the fungal life cycle when sexually reproductive cells and organs are formed. This term is preferred over sex in animals, as the fungal process is not equivalent.

slime mold: Acrasis rosea 31095.jpg'', a cellular slime mold.]] A eukaryotic lifeform that spreads via spores. Has both ameba (cellular slime molds) and plasmoidial (multi-nucleate) varieties. No longer categorized as fungi, but were formerly categorized as such in older literature. Cellular slime molds are part of Acrasiomycota or Dictyosteliomycota; plasmodial slime molds were traditionally part of the class, since renamed Myxogastria. From Gr. myxa, slime.

smut: Ustilago nuda barley, stuifbrand op gerst (3).jpg of barley, caused by Ustilago nuda.]] A class of destructive plant diseases, generally of cereal grasses, caused by parasitic fungi of Ustilaginomycetes. Distinguished by transformation of plant organs permeated by hyphae into a dark mass of spores. Smut-causing fungi themselves in Ustilaginomycetes. Characterized by being host-specific endophytes. Its spores are called. "False" smuts outside Ustilaginomycetes but that cause similar effects, such as Microbotryales and Exobasidiales.

soma: 1. The (sustaining) body of an organism, distinguished from reproductive parts or phases. From Gr. soma, body. Possibly the hallucinogenic Amanita muscaria mushroom in ancient Aryan religion; see botanical identity of soma–haoma.

somatogamy: The fusion of (vegetative) cells during but not. Found in the majority of basidiomycetes, many species of yeasts (such as Saccharomyces), and some chytrids (such as Chytriomyces).

soredium: A for vegetative lichen growth; a combination of algae wrapped by  hyphae, and produced on a lichen thallus. Has the appearance of a powdery granule. From Latin soredium, a small heap.

sorus: A heap of spores. Fruiting structure in certain fungi, including the spore mass of rusts, but also Acrasidae and Synchytriaceae. From Gr. soros, heap.

spawn: used for starting fungal cultures, especially mushrooms; e.g. bricks of manure interlaced with mycelia.

spinose: Having spines.

spinulose: Having small, delicate spines (spinules).

Spitzenkörper: A -rich body surrounded by actin filaments found in the growing tips of most fungi during periods of growth. Densely staining.

spor-: Prefixes meaning "spore". From Gr. spora, seed.

sporangiolum: A small sporangium of Mucorales producing a small number of sporangiospores.

sporangiophore: A thallus element bearing one or more.

sporangiospore: A walled spore produced within a sporangium.

sporangium: A sac-like structure that produces spores endogenously. From Gr. angeion, vessel.

spore: A reproductive structure in fungi. Can result from both sexual and asexual processes.

spore wall: The layered wall defining a spore. Considered to have five layers. From within to outwards: the thin interior endosporium, the thick episporium, the exosporium (or tunic), the perisporium, and ectosporium, although the outermost two layers are fleeting and can be absorbed back into the perisporium and exosporium.

sporocarp: A unit for production, protection, and dissemination of spores. Sometimes divided into,, and zyogosporocarp.

sporodochium: A cluster of s bearing the spore mass, like a cushion.

statismospore: A spore that is not forcibly discharged, unlike a. Seen in the basidiospores of Gastromycetes. From Gr. statis, immobility.

stellate: Like a star in form, especially spores.

sterigma: The small, spicule-like (pointed) or structure upon which a forms. From Gr. sterigma, support.

stipe: The stem or stalk of s, s, polypores, etc. From Latin stipes, trunk.

stolon: A horizontal that sprouts where it touches the substrate, in Mucorales. Connects groups of s.

striate: Having minute radiating lines or ridges, such as the margin of a.

stroma: Stroma2.PNG, an ascomycete]] A mass of hyphae where fertile hyphae, fruiting bodies, and spores are produced. Common among and anamorphic fungi; a few Pucciniales have them as well.

subglobose: Not quite spherical.

substrate: The substance on which an enzyme acts. The substances used for growth, e.g. the culture medium in a lab. A synonym for.

substratum: The material on which the organism is growing or is attached; the ecology in the directly local sense.

sympodial: A mode of cell growth which results in the development of conidia on a or zig-zag, due to repeated termination and branching. Examples include Cercospora and Helminthosporium.

synanamorph: Fungi which have multiple, or imperfect, phases.

synctium: A multinucleate structure resulting from the fusion of several uninucleate ameboid cells (myxameba), found in.

synnema: A bundle of and sometimes fused s that make a together. Conidia are born at the apex, and sometimes along the sides as well. Characteristic of certain including Doratomyces, Dendrostilbella, and Graphium.

T
teleomorph: The sexual state (or perfect state) of a fungus whose spores are produced by, i.e. characterized by or.

thallic: One of the two basic forms of, with conidiogenesis. Characterized by the conidia initial being delimited by one or more before it begins enlargement. The result is that the conidium is differentiated from the whole cell. By comparison, in blastic conidiogenesis, enlargement occurs within the cell before being delimited later.

thallus: 1. The tissue of a thallophyte. Usually synonymous with in fungi. From Latin thallus, young branch. A mode of conidial ontogeny where a conidium is formed from a pre-existing hyphal segment or cell.

torulose: Elongated in shape with swellings and constrictions at intervals. Found, e.g., in mycelia of Torula.

trama: A layer of hyphae in the central part of an running from the underside of the to the, often supporting the. Sometimes called a hymenophoral trama to distinguish it from the second definition. In old literature, any part of the, although this use has since been discouraged.

trehalose: A reserve sugar of fungi, especially yeasts and ergots, and lichens. Hydrolyzed by the enzyme trehalase.

tretic: A form of conidiogenesis. Each conidium (tretoconidium, porospore) is delimited via the inner wall of the conidiogenous cell.

trichospore: A type of ; a sporangia bearing a single spore. Usually coiled. Characteristic of the order Harpellales (formerly part of Trichomycetes).

troop: A group of fruit bodies from a single.

truffle: Tuber aestivum Valnerina 014.jpg'' or summer truffle.]] The edible, subterranean fruit of Tubers. Sometimes extended to "false truffles" as well such as Pezizales or Hymenogastrales.

truncate: Ending abruptly, as if cut off. From Latin truncare, to maim.

tubercle: A knob-like or wart-like excrescence.

tubercular: Having s.

tumid: Swollen; inflated; e.g. of a.

turgid: Tightly swollen, e.g. from hydrostatic pressure of endosmosed water. From Latin turgidus, distended.

U
umbilicus: In some foliose lichens (e.g. Umbilicaria), the central, strongly attaching organ of the.

uniseriate: Arranged in a single row or series. Generally used to differentiate how s are arranged in species of Aspergillus; in uniseriate, they are directly on the conidial head, contrasted with biseriate where phialides rest on intermediate outgrowths of sterile cells called metulae.

universal veil: Amanita muscaria 3 vliegenzwammen op rij.jpg'' mushrooms are cap scales, remnants of the universal veil.]] A layer of tissue covering the during its early development, in s and Gasteromycetes. As the grows, the veil is broken, with its upper remnants becoming cap scales, and the lower section becoming the.

ustilospore: The of a fungus.

V
verrucose: Warty; having rounded bumps. Verruculose is the diminutive version for delicate or small warts.

verticillate: Having parts in rings (verticils); whorled. Develops due to branching in which branches or pedicels are borne at the same level on the, and grow obliquely upward with respect to the central axis. Named after the conidiophores of Verticillium, but appears in other fungi such as the of Actinomucor. From New Latin verticillatus, arranged in a verticil.

vesicle: A bladder-like sac, especially of Pythiales where s mature. The swollen apex of the of Aspergillus The subsporangial swelling in species of Pilobolus.

virgate: Banded or streaked. Generally applied to the surface of the of a. From Latin virga, a twig, wand, rod, stripe, or streak.

volva: The cup-like remnant of the at the base of the in the  of s and Gasteromycetes. Generally beneath the soil as a result, hidden from view unless the fungus is uprooted.

W
wart disease: Synchytridium endobioticum.jpg A fungal disease of the potato caused by Synchytrium endobioticum, a.

witches' brooms: Massed outgrowths on branches of woody plants caused by mites, virii, and/or fungi, especially -causing fungi.

witches' butter: Basidioma of Exidia glandulosa (or, in America, Tremella lutescens). Supposedly effective in witchcraft when thrown into a fire.

wood-decay fungus: Fungi that digest wood. Mostly basidiomycetes, although a few ascomycetes also possess this ability. Generally categorized into brown rot, which digests a tree's cellulose and hemicellulose but not its lignin; white rot, which can also digest lignin; and soft rots, which are similar to brown rots in attacking cellulose and hemicellulose, but require moist wood and available nitrogen, e.g. from nearby soil. Two other notable types are dry rot (a slight misnomer, as some dampness is still required), a brown rot caused by Serpula lacrimans; and wet rot, several other species including cellar fungus.

X
xerophilic: Preferring a dry habitat, or at least capable of subsisting in one. Rare among fungal species, but fungi with this capability can be exceptionally common, such as Aspergillus and Penicillium whose spores can be found in nearly any soil sample.

Y
yeast: Клетки дрожжей из напитка комбуча 2.tif cells under magnification from kombucha, a fermented sweet tea drink.]] Unicellular, fungi. Not a formal taxonomic unit; a cross-phyla grouping of filamentous fungi. Classifications include sporogenous yeasts, asporogenous yeasts, apiculate yeasts, baker's yeast, brewer's yeast and beer yeasts, black yeasts, bottom yeasts, top yeasts, Chinese yeasts, flor yeasts, food yeasts, petite yeasts, shadow yeasts, springer yeasts, toddy yeasts, and wine yeasts. From Old High German jesan, ferment.

yellow rice: Rice discolored and contaminated by Penicillium fungi.

yellows: Various fungal diseases of plants causing yellowing, most notably cabbage (Fusarium oxysporum). See also.

Z
Zoopagomycotina: A subdivision of Zygomycota broken off into a separate classification in the 2010s. Typically microscopic and obligate parasites.

zoospore: A, i.e. having flagella.

Zygomycota: Endogone pisiformis 56016.jpg pisiformus'' growing on sphagnum in a wet area]] A traditional major phylum of fungi; characterized by mycelia. Divided into Mucoromycota and Zoopagomycota in 2016. Frequently s or parasites of arthropods.

zygospore: A thick-walled sexual spore formed by the fusion of two similar gametangia; characteristic of the Zygomycetes.

zygote: A cell resulting from the fusion of two gametes of opposite sex.

zymo-: Prefix meaning "yeast". From Gr. zymos, yeast.

zymogenous: Ferment-producing.

zymology: The practice and study of s and in brewing and wine-making.