List of grasses of Puerto Rico

The grass family Poaceae is the largest group of flowering plants present on the island of Puerto Rico. With 258 species, it represents 9% of all Angiosperms and 33% of all Monocots.

The following is a list of grass species known to exist in Puerto Rico, separated by genus:

Agrostis

 * Agrostis hyemalis

Andropogon

 * Andropogon bicornis
 * Andropogon glomeratus
 * Andropogon gracilis
 * Andropogon leucostachyus
 * Andropogon virginicus

Anthephora

 * Anthephora hermaphrodita

Aristida

 * Aristida adscensionis
 * Aristida chaseae
 * Aristida portoricensis
 * Aristida refracta
 * Aristida spiciformis
 * Aristida suringarii
 * Aristida swartziana

Arthraxon

 * Arthraxon castratus

Arthrostylidium

 * Arthrostylidium farctum
 * Arthrostylidium multispicatum
 * Arthrostylidium sarmentosum

Arundinella

 * Arundinella hispida

Arundo

 * Arundo donax

Avena

 * Avena sativa

Axonopus

 * Axonopus aureus
 * Axonopus compressus
 * Axonopus fissifolius

Bambusa

 * Bambusa multiplex
 * Bambusa vulgaris

Bothriochloa

 * Bothriochloa ischaemum
 * Bothriochloa pertusa
 * Bothriochloa saccharoides

Bouteloua

 * Bouteloua americana
 * Bouteloua juncea
 * Bouteloua repens

Brachyelytrum

 * Brachyelytrum erectum

Cenchrus

 * Cenchrus brownii
 * Cenchrus echinatus
 * Cenchrus gracillimus
 * Cenchrus myosuroides
 * Cenchrus spinifex

Chloris

 * Chloris barbata
 * Chloris ciliata
 * Chloris cubensis
 * Chloris elata
 * Chloris radiata
 * Chloris sagraeana

Chusquea

 * Chusquea abietifolia

Coix

 * Coix lacryma-jobi

Cymbopogon

 * Cymbopogon citratus
 * Cymbopogon nardus

Cynodon

 * Cynodon dactylon
 * Cynodon nlemfuensis

Dactylis

 * Dactylis glomerata

Dactyloctenium

 * Dactyloctenium aegyptium

Dichanthelium

 * Dichanthelium aciculare
 * Dichanthelium acuminatum
 * Dichanthelium dichotomum
 * Dichanthelium leucothrix
 * Dichanthelium ovale
 * Dichanthelium sabulorum
 * Dichanthelium scoparium
 * Dichanthelium strigosum

Dichanthium

 * Dichanthium annulatum
 * Dichanthium aristatum

Diectomis

 * Diectomis fastigiata
 * Diectomis argillacea
 * Diectomis bicornis
 * Diectomis ciliaris
 * Diectomis dolichophylla
 * Diectomis eriantha
 * Diectomis horizontalis
 * Diectomis insularis
 * Diectomis ischaemum
 * Diectomis longiflora
 * Diectomis nuda
 * Diectomis panicea
 * Diectomis sanguinalis
 * Diectomis setigera
 * Diectomis similis
 * Diectomis villosa
 * Diectomis violascens

Echinochloa

 * Echinochloa colona
 * Echinochloa crus-galli
 * Echinochloa crus-pavonis
 * Echinochloa polystachya
 * Echinochloa stagnina

Eleusine

 * Eleusine indica

Eragrostis

 * Eragrostis amabilis
 * Eragrostis barrelieri
 * Eragrostis ciliaris
 * Eragrostis curvula
 * Eragrostis elliottii
 * Eragrostis glutinosa
 * Eragrostis hypnoides
 * Eragrostis pectinacea
 * Eragrostis pilosa
 * Eragrostis urbaniana

Eremochloa

 * Eremochloa ophiuroides

Eriochloa

 * Eriochloa polystachya
 * Eriochloa punctata

Eriochrysis

 * Eriochrysis cayennensis

Euclasta

 * Euclasta condylotricha

Eustachys

 * Eustachys petraea

Gymnopogon

 * Gymnopogon foliosus

Gynerium

 * Gynerium sagittatum

Hackelochloa

 * Hackelochloa granularis

Heteropogon

 * Heteropogon contortus

Holcus

 * Holcus lanatus

Homolepis

 * Homolepis glutinosa

Hymenachne

 * Hymenachne amplexicaulis

Hyparrhenia

 * Hyparrhenia rufa

Hypogynium

 * Hypogynium virgatum

Ichnanthus

 * Ichnanthus nemorosus
 * Ichnanthus pallens
 * Ichnanthus tenuis

Imperata

 * Imperata brasiliensis
 * Imperata contracta

Isachne

 * Isachne angustifolia

Lasiacis

 * Lasiacis divaricata
 * Lasiacis grisebachii
 * Lasiacis ligulata
 * Lasiacis sloanei
 * Lasiacis sorghoidea

Leersia

 * Leersia hexandra
 * Leersia monandra

Leptochloa

 * Leptochloa fusca
 * Leptochloa nealleyi
 * Leptochloa panicea
 * Leptochloa panicoides
 * Leptochloa scabra
 * Leptochloa virgata

Leptochloopsis

 * Leptochloopsis virgata

Leptocoryphium

 * Leptocoryphium lanatum

Lithachne

 * Lithachne pauciflora

Lolium

 * Lolium perenne

Melinis

 * Melinis minutiflora
 * Melinis repens

Microstegium

 * Microstegium vimineum

Muhlenbergia

 * Muhlenbergia capillaris

Olyra

 * Olyra latifolia

Oplismenus

 * Oplismenus hirtellus

Oryza

 * Oryza latifolia
 * Oryza sativa

Panicum

 * Panicum dichotomiflorum
 * Panicum diffusum
 * Panicum elephantipes
 * Panicum ghiesbreghtii
 * Panicum laxum
 * Panicum miliaceum
 * Panicum parvifolium
 * Panicum rigidulum
 * Panicum schiffneri
 * Panicum stenodes
 * Panicum stevensianum
 * Panicum tenerum
 * Panicum trichanthum
 * Panicum trichoides
 * Panicum venezuelae

Pappophorum

 * Pappophorum pappiferum

Paspalum

 * Paspalum arundinaceum
 * Paspalum bakeri
 * Paspalum blodgettii
 * Paspalum boscianum
 * Paspalum caespitosum
 * Paspalum clavuliferum
 * Paspalum conjugatum
 * Paspalum convexum
 * Paspalum decumbens
 * Paspalum densum
 * Paspalum dilatatum
 * Paspalum dispar
 * Paspalum distichum
 * Paspalum fasciculatum
 * Paspalum fimbriatum
 * Paspalum laxum
 * Paspalum macrophyllum
 * Paspalum maritimum
 * Paspalum millegrana
 * Paspalum minus
 * Paspalum molle
 * Paspalum notatum
 * Paspalum orbiculatum
 * Paspalum paniculatum
 * Paspalum parviflorum
 * Paspalum paucispicatum
 * Paspalum pleostachyum
 * Paspalum plicatulum
 * Paspalum pulchellum
 * Paspalum rupestre
 * Paspalum secans
 * Paspalum setaceum
 * Paspalum urvillei
 * Paspalum vaginatum
 * Paspalum virgatum

Pennisetum

 * Pennisetum ciliare
 * Pennisetum clandestinum
 * Pennisetum glaucum
 * Pennisetum polystachion
 * Pennisetum purpureum

Pharus

 * Pharus lappulaceus
 * Pharus latifolius
 * Pharus parvifolius

Phragmites

 * Phragmites australis

Poa

 * Poa annua
 * Poa pratensis

Polypogon

 * Polypogon viridis

Polytrias

 * Polytrias indica

Rottboellia

 * Rottboellia cochinchinensis

Saccharum

 * Saccharum officinarum
 * Saccharum spontaneum

Sacciolepis

 * Sacciolepis indica
 * Sacciolepis striata

Schizachyrium

 * Schizachyrium brevifolium
 * Schizachyrium sanguineum
 * Schizachyrium tenerum

Setaria

 * Setaria barbata
 * Setaria chapmanii, syn. Paspalidium chapmanii
 * Setaria geminata, syn. Paspalidium geminatum
 * Setaria magna
 * Setaria parviflora
 * Setaria pradana
 * Setaria rariflora
 * Setaria setosa
 * Setaria tenacissima
 * Setaria utowanaea
 * Setaria vulpiseta

Sorghastrum

 * Sorghastrum setosum
 * Sorghastrum stipoides

Sorghum

 * Sorghum bicolor
 * Sorghum halepense

Spartina

 * Spartina patens

Sporobolus

 * Sporobolus cubensis
 * Sporobolus domingensis
 * Sporobolus indicus
 * Sporobolus pyramidatus
 * Sporobolus tenuissimus
 * Sporobolus virginicus

Stenotaphrum

 * Stenotaphrum secundatum

Themeda

 * Themeda arguens

Tragus

 * Tragus berteronianus

Tripidium

 * Tripidium bengalense

Tripsacum

 * Tripsacum fasciculatum
 * Tripsacum latifolium

Triticum

 * Triticum aestivum

Urochloa

 * Urochloa adspersa
 * Urochloa arrecta
 * Urochloa brizantha
 * Urochloa decumbens
 * Urochloa distachya
 * Urochloa fuscata
 * Urochloa maxima
 * Urochloa mosambicensis
 * Urochloa mutica
 * Urochloa plantaginea
 * Urochloa reptans

Vetiveria

 * Vetiveria zizanioides

Vulpia

 * Vulpia bromoides

Zea

 * Zea mays

Zoysia

 * Zoysia matrella
 * Zoysia tenuifolia