List of garden plants in North America

This is a partial list of garden plants, plants that can be cultivated in gardens in North America, listed alphabetically by genus.

A

 * Abelia
 * Abeliophyllum (white forsythia)
 * Abelmoschus (okra)
 * Abies (fir)
 * Abroma
 * Abromeitiella (obsolete)
 * Abronia (sand verbena)
 * Abrus
 * Abutilon
 * Acacia (wattle)
 * Acaena
 * Acalypha
 * Acanthaceae
 * Acanthodium
 * Acantholimon
 * Acanthopale
 * Acanthophoenix
 * Acanthus
 * Acca
 * Acer (maple)
 * Achariaceae
 * Achillea (yarrow)
 * Achimenantha (hybrid genus)
 * Achimenes
 * Acinos (calamint)
 * Aciphylla
 * Acmena
 * Acoelorraphe (saw palm)
 * Acokanthera
 * Aconitum (aconite, monkshood)
 * Acorus
 * Acradenia
 * Acrocomia
 * Actaea (baneberry)
 * Actinidia (kiwifruit)
 * Ada orchid genus
 * Adansonia
 * Adenandra
 * Adenanthos
 * Adenia
 * Adenium
 * Adenocarpus
 * Adenophora
 * Adenostoma
 * Adiantum (maidenhair fern)
 * Adlumia
 * Adonis
 * Adromischus
 * Aechmea
 * Aegopodium
 * Aeonium
 * Aerangis (an orchid genus)
 * Aerides (an orchid genus)
 * Aeschynanthus
 * Aesculus
 * Aethionema
 * Afgekia
 * Agapanthus
 * Agapetes
 * Agastache
 * Agathis
 * Agathosma
 * Agave
 * Ageratum
 * Aglaia
 * Aglaomorpha
 * Aglaonema
 * Agonis
 * Agrimonia
 * Agrostemma (corn cockle)
 * Agrostis
 * Aichryson
 * Ailanthus (tree of heaven, etc.)
 * Aiphanes
 * Aira (hair grass)
 * Ajania
 * Ajuga (bugleweed)
 * Akebia
 * Alangium
 * Alberta
 * Albizia (silk tree)
 * Albuca
 * Alcea (hollyhock)
 * Alchemilla
 * Aldrovanda
 * Aleurites
 * × Aliceara (hybrid genus)
 * Alisma (water plantain)
 * Alkanna
 * Allagoptera
 * Allamanda
 * Allium (onion)
 * Allocasuarina
 * Allosyncarpia
 * Alloxylon
 * Alluaudia
 * Alnus (alder)
 * Alocasia
 * Aloe
 * Aloinopsis
 * Alonsoa
 * Alopecurus (foxtail grass)
 * Aloysia
 * Alphitonia
 * Alpinia (ginger lily)
 * Alsobia
 * Alstonia
 * Alstroemeria
 * Alternanthera
 * Althaea
 * Alyogyne
 * Alyssum
 * Alyxia
 * Amaranthus
 * Amarcrinum (hybrid genus)
 * Amarygia (hybrid genus)
 * Amaryllis
 * Amberboa
 * Amelanchier
 * Amesiella
 * Amherstia
 * Amicia
 * Ammi
 * Ammobium
 * Amorpha
 * Amorphophallus
 * Ampelopsis
 * Amsonia
 * Anacampseros
 * Anacardium
 * Anacyclus
 * Anagallis (pimpernel)
 * Ananas (pineapple)
 * Anaphalis
 * Anchusa
 * Andersonia
 * Andira
 * Androlepis
 * Andromeda
 * Andropogon
 * Androsace
 * Anemone (windflower)
 * Anemonella
 * Anemonopsis
 * Anemopaegma
 * Anethum (dill)
 * Angelica
 * Angelonia
 * Angiopteris
 * Angophora
 * Angraecum (an orchid genus)
 * Anguloa (an orchid genus)
 * Angulocaste (a hybrid orchid genus)
 * Anigozanthos
 * Anisacanthus
 * Anisodontea
 * Annona
 * Anoda
 * Anomatheca (See Freesia)
 * Anopterus
 * Anredera
 * Antennaria
 * Anthemis
 * Anthericum
 * Anthocleista
 * Anthotroche
 * Anthriscus
 * Anthurium
 * Anthyllis
 * Antidesma
 * Antigonon
 * Antirrhinum (snapdragon)
 * Apera
 * Aphelandra
 * Aphyllanthes
 * Apium
 * Apocynum
 * Aponogeton
 * Apophyllum
 * Apodytes
 * Aponogeton
 * Aporocactus
 * Aporoheliocereus (hybrid genus)
 * Aprevalia
 * Aptenia, synonym of Mesembryanthemum
 * Aquilegia (columbine)
 * Arabis (rock cress)
 * Arachis
 * Arachniodes
 * Arachnis (scorpion orchid) (orchid genus)
 * Araeococcus
 * Araiostegia
 * Aralia
 * Araucaria (monkey-puzzle)
 * Araujia
 * Arbutus (madrone)
 * Archidendron
 * Archontophoenix (king palm)
 * Arctium
 * Arctostaphylos (bearberry, manzanita)
 * Arctotheca
 * Arctotis (African daisy)
 * Ardisia
 * Areca
 * Arenaria (sandwort)
 * Arenga
 * Argemone (prickly poppy)
 * Argyranthemum
 * Argyreia
 * Argyroderma
 * Ariocarpus
 * Arisaema
 * Arisarum
 * Aristea
 * Aristolochia
 * Aristotelia
 * Armeria
 *  Armoracia 
 * Arnebia
 * Arnica
 * Aronia (chokeberry)
 * Arrabidaea, see Bignonia magnifica
 * Arrhenatherum (oat grass)
 * Artanema
 * Artabotrys
 * Artemisia (mugwort, sagebrush, wormwood)
 * Arthrocereus
 * Arthropodium
 * Artocarpus
 * Arum
 * Aruncus
 * Arundina
 * Arundinaria
 * Arundo
 * Asarina
 * Asarum (wild ginger)
 * Asclepias (milkweed, silkweed)
 * × Ascocenda (hybrid genus) (an orchid genus)
 * Ascocentrum an orchid genus
 * Asimina
 * Asparagus
 * Asperula (woodruff)
 * Asphodeline
 * Asphodelus (asphodel)
 * Aspidistra
 * Asplenium
 * Astelia
 * Aster
 * Asteranthera
 * Astilbe
 * Astilboides
 * Astragalus (milk vetch)
 * Astrantia
 * Astrophytum
 * Asystasia
 * Atalaya
 * Athamanta
 * Atherosperma
 * Athrotaxis
 * Athyrium
 * Atriplex
 * Attalea
 * Aubrieta
 * Aucuba
 * Aulax
 * Auranticarpa
 * Aurinia
 * Austrocedrus
 * Austrocylindropuntia
 * Austrostipa
 * Averrhoa
 * Avicennia
 * Azadirachta
 * Azalea
 * Azara
 * Azolla (aquatic ferns)
 * Azorella
 * Azorina
 * Aztekium
 * Azetura

B

 * Babiana
 * Baccharis
 * Backhousia
 * Bacopa (water hyssop)
 * Bactris
 * Baeckea
 * Baikiaea
 * Baileya
 * Ballota
 * Balsamorhiza (balsam root)
 * Bambusa (bamboo)
 * Banksia
 * Baptisia an orchid genus
 * Barbarea (yellow rocket or winter cress)
 * Barkeria (an orchid genus)
 * Barleria
 * Barklya (gold blossom tree)
 * Barnadesia
 * Barringtonia
 * Bartlettina
 * Basselinia
 * Bassia
 * Bauera
 * Bauhinia
 * Baumea
 * × Beallara an orchid hybrid genus
 * Beaucarnea
 * Beaufortia
 * Beaumontia
 * Beccariella
 * Bedfordia
 * Begonia
 * Belamcanda
 * Bellevalia
 * Bellis (daisy)
 * Bellium
 * Berberidopsis
 * Berberis (barberry)
 * Berchemia
 * Bergenia
 * Bergerocactus
 * Berkheya
 * Berlandiera
 * Berrya
 * Bertolonia
 * Berzelia
 * Beschorneria
 * Bessera
 * Beta (beet)
 * Betula (birch)
 * Biarum
 * Bidens
 * Bignonia
 * Bikkia
 * Billardiera
 * Billbergia
 * Bischofia
 * Bismarckia
 * Bixa
 * Blandfordia
 * Blechnum (hard fern)
 * Bletilla (an orchid genus)
 * Blighia
 * Bloomeria
 * Blossfeldia
 * Bocconia
 * Boenninghausenia
 * Bolax
 * Bolbitis
 * Bollea (an orchid genus)
 * Boltonia
 * Bolusanthus
 * Bomarea
 * Bombax
 * Bongardia
 * Boophone
 * Borago
 * Borassodendron
 * Borassus
 * Boronia
 * Bosea
 * Bossiaea
 * Bothriochloa
 * Bougainvillea
 * Bouteloua
 * Bouvardia
 * Bowenia
 * Bowiea
 * Bowkeria
 * Boykinia
 * Brabejum
 * Brachychiton
 * Brachyglottis
 * Brachylaena
 * Brachypodium
 * Brachyscome
 * Brachysema
 * Brachystelma
 * Bracteantha
 * Brahea (hesper palm)
 * Brassavola (an orchid genus)
 * Brassaia (octopus tree)
 * Brassia (an orchid genus)
 * Brassica (mustard, cabbage)
 * × Brassidium (hybrid orchids)
 * × Brassocattleya (hybrid orchids)
 * × Brassolaeliocattleya (trigeneric hybrid orchids)
 * Breynia
 * Briggsia
 * Brillantaisia
 * Brimeura
 * Briza (quaking grass)
 * Brodiaea
 * Bromelia
 * Broughtonia an orchid genus
 * Broussonetia
 * Browallia
 * Brownea
 * Browningia
 * Bruckenthalia
 * Brugmansia
 * Brunfelsia
 * Brunia
 * Brunnera
 * Brunsvigia
 * Brya
 * Buchloe
 * Buckinghamia
 * Buddleja
 * Buglossoides
 * Bulbine
 * Bulbinella
 * Bulbocodium
 * Bulbophyllum (an orchid genus)
 * Bulnesia
 * Bunchosia
 * Buphthalmum
 * Bupleurum
 * Burchardia
 * Burchellia
 * × Burrageara an orchid hybrid genus
 * Burretiokentia
 * Bursaria
 * Bursera
 * Burtonia
 * Butea
 * Butia
 * Butomus
 * Buxus (boxwood)
 * Byrsonima
 * Bystropogon

C

 * Cabomba
 * Cadia
 * Caesalpinia (dwarf poinciana, Pride of Barbados)
 * Caladium
 * Calamagrostis (reed grass, smallweed)
 * Calamintha (calamint)
 * Calamus
 * Calandrinia
 * Calanthe an orchid genus
 * Calathea
 * Calceolaria (slipperwort)
 * Calendula (pot marigold)
 * Calibanus
 * Calibrachoa
 * Calla
 * Calliandra
 * Callianthemum
 * Callicarpa (beauty berry)
 * Callicoma (black wattle)
 * Callirhoe (poppy mallow)
 * Callisia
 * Callistemon (bottlebrush)
 * Callistephus (Chinese aster)
 * Callitriche (water starwort)
 * Callitris (cypress pine)
 * Calluna (heather)
 * Calocedrus (incense cedar)
 * Calochone
 * Calochortus
 * Calodendrum (cape chestnut)
 * Calomeria
 * Calophaca
 * Calophyllum
 * Calopyxis
 * Caloscordum
 * Calothamnus
 * Calotropis
 * Calpurnia
 * Caltha (kingcup, marsh marigold)
 * Calycanthus
 * Calymmanthium
 * Calypso (an orchid genus)
 * Calytrix (starflower)
 * Camassia (quamash)
 * Camellia
 * Camoensia
 * Campanula (bellflower)
 * Campsis (trumpet vine)
 * Campylotropis (See Lespedeza)
 * Cananga (ylang ylang)
 * Canarina
 * Canistrum
 * Canna
 * Cantua
 * Capparis
 * Capsicum (pepper)
 * Caragana (peashrub)
 * Caralluma
 * Cardamine (bittercress)
 * Cardiocrinum
 * Cardiospermum
 * Cardwellia
 * Carex (sedge)
 * Carissa
 * Carlina
 * Carludovica
 * Carmichaelia
 * Carnegiea (saguaro)
 * Carpentaria
 * Carphalea
 * Carpinus (hornbeam)
 * Carpobrotus
 * Carthamus (safflower)
 * Carum (caraway)
 * Carya (hickory, pecan)
 * Caryopteris
 * Caryota (fishtail palm)
 * Cassia (shower tree)
 * Cassinia
 * Cassiope
 * Cassipourea
 * Castanea (chestnut)
 * Castanopsis
 * Castanospermum (black bean)
 * Casuarina (sheoak)
 * Catalpa (Indian bean)
 * Catananche
 * Catasetum (an orchid genus)
 * Catha (khat tree)
 * Catharanthus (Madagascar periwinkle)
 * Catopsis
 * Cattleya (an orchid genus)
 * Caulophyllum
 * Cautleya
 * Cavendishia
 * Ceanothus (California-lilac)
 * Cedrela (toon)
 * Cedronella
 * Cedrus (cedar)
 * Ceiba (kapok)
 * Celastrus (staff-vine)
 * Celmisia (New Zealand daisy, New Zealand aster)
 * Celosia (cockscomb)
 * Celtis (hackberry)
 * Centaurea
 * Centaurium
 * Centradenia
 * Centranthus (valerian)
 * Cephalaria
 * Cephalocereus
 * Cephalophyllum
 * Cephalotaxus (plum-yew)
 * Ceraria
 * Cerastium
 * Ceratonia (St. John's bread, carob bean)
 * Ceratopetalum (coachwood)
 * Ceratophyllum
 * Ceratopteris
 * Ceratostigma
 * Ceratozamia
 * Cerbera (sea mango)
 * Cercidiphyllum
 * Cercis (Judas tree, redbud)
 * Cercocarpus
 * Cereus
 * Ceropegia
 * Cestrum
 * Chadsia
 * Chaenomeles (flowering quince)
 * Chaenorhinum (dwarf snapdragon)
 * Chaerophyllum
 * Chamaecyparis (false cypress)
 * Chamaecytisus
 * Chamaedaphne
 * Chamaedorea
 * Chamaelirium
 * Chamaemelum (chamomile)
 * Chamaerops
 * Chamelaucium (wax flower)
 * Chasmanthe
 * Chasmanthium
 * Cheilanthes
 * Cheiridopsis
 * Chelidonium
 * Chelone (turtlehead)
 * Chiastophyllum
 * Chiliotrichum
 * Chilopsis (desert willow)
 * Chimaphila
 * Chimonanthus (wintersweet)
 * Chimonobambusa
 * Chionanthus (fringe tree)
 * Chionochloa
 * Chirita
 * Chlidanthus
 * Choisya
 * Chonemorpha (Frangipani vine)
 * Choricarpia (brush turpentine)
 * Chorisia (floss silk tree)
 * Chorizema
 * Chrysalidocarpus
 * Chrysanthemoides
 * Chrysanthemum
 * Chrysobalanus
 * Chrysogonum
 * Chrysolepis
 * Chrysophyllum (star apple)
 * Chrysothemis
 * Chusquea
 * Cibotium
 * Cicerbita
 * Cichorium (chicory, endive)
 * Cimicifuga (bugbane)
 * Cinnamomum (camphor laurel)
 * Cionura
 * Cirsium
 * Cissus
 * Cistus (rock rose, sun rose)
 * Citharexylum (fiddlewood)
 * Citrofortunella (hybrid)
 * Citrus (lime, lemon)
 * Cladanthus
 * Cladrastis
 * Clarkia
 * Claytonia
 * Cleistocactus
 * Clematis
 * Cleome (spider flower)
 * Clerodendrum
 * Clethra (summersweet)
 * Cleyera
 * Clianthus
 * Clintonia
 * Clitoria
 * Clivia
 * Clusia
 * Clytostoma
 * Cobaea
 * Coccoloba (sea grape)
 * Coccothrinax (thatch palm)
 * Cocculus
 * Cochlioda an orchid genus – synonym of Oncidium
 * Cochlospermum (buttercup tree, Maximiliana)
 * Cocos (coconut)
 * Codiaeum (croton)
 * Codonanthe
 * Codonopsis
 * Coelia
 * Coelogyne (an orchid genus)
 * Coffea (coffee tree)
 * Coix
 * Colchicum (autumn crocus, meadow saffron)
 * Coleonema
 * Colletia
 * Collinsia
 * Collomia
 * Colocasia (taro)
 * Colquhounia
 * Columnea
 * Colutea (bladder senna)
 * Coluteocarpus
 * Colvillea
 * Combretum
 * Comesperma
 * Commelina (day flower, spiderwort, widow's tears)
 * Commersonia
 * Commidendrum
 * Commiphora
 * Comptonella
 * Comptonia (Sweetfern)
 * Conandron
 * Congea
 * Conicosia
 * Coniogramme
 * Conoclinium (mistflower)
 * Conophytum
 * Conospermum
 * Conostylis
 * Conradina
 * Consolida (larkspur)
 * Convallaria (lily-of-the-valley)
 * Convolvulus (bindweed, morning glory)
 * Copernicia (caranda palm, wax palm)
 * Copiapoa syn. Pilocopiapoa
 * Coprosma
 * Coptis (goldthread)
 * Cordia (bird lime tree)
 * Cordyline
 * Coreopsis (tickseed)
 * Coriandrum (coriander cilantro)
 * Coriaria
 * Cornus (dogwood, cornel)
 * Corokia
 * Coronilla
 * Correa
 * Corryocactus
 * Cortaderia (pampas grass, tussock grass)
 * Cortusa
 * Corybas (helmet orchid)
 * Corydalis
 * Corylopsis (winter-hazel)
 * Corylus (hazel, filbert)
 * Corymbia
 * Corynocarpus
 * Corypha
 * Coryphantha
 * Cosmos
 * Costus
 * Cotinus (smoke bush)
 * Cotoneaster
 * Cotula (brass buttons)
 * Cotyledon
 * Couroupita (cannonball tree)
 * Crambe
 * Craspedia
 * Crassula
 * + Crataegomespilus (graft chimera)
 * Crataegus (hawthorn)
 * × Crataemespilus (hybrid)
 * Crepis
 * Crescentia (calabash)
 * Crinodendron
 * Crinum
 * Crocosmia (falling stars, montbretia)
 * Crocus
 * Crossandra (firecracker flower)
 * Crotalaria (rattlepod)
 * Croton
 * Crowea
 * Cryptanthus (earth stars)
 * Cryptbergia (hybrid)
 * Cryptocarya
 * Cryptocoryne (water trumpet)
 * Cryptomeria (sugi, Japanese cedar)
 * Cryptostegia (Indian rubber vine)
 * Cryptotaenia
 * Ctenanthe
 * Cucumis
 * Cucurbita
 * Cuminum
 * Cunila
 * Cunninghamia (China-fir)
 * Cunonia
 * Cupaniopsis (tuckeroo)
 * Cuphea
 * Cupressus (cypress)
 * Cuprocyparis (hybrid)
 * Curcuma
 * Cussonia
 * Cyananthus (trailing bellflower)
 * Cyanotis
 * Cyathea (tree fern)
 * Cyathodes
 * Cybistax
 * Cycas (cycad, sago palm)
 * CyclamenCyclamenPink wb.jpg
 * Cycnoches an orchid genus
 * Cydista, synonym of Bignonia
 * Cydonia (quince)
 * Cylindropuntia
 * Cymbalaria (ivy-leaved toadflax)
 * Cymbidium (an orchid genus)
 * Cymbopogon
 * Cynara
 * Cynodon
 * Cynoglossum (hound's tongue)
 * Cypella
 * Cyperus
 * Cyphomandra (tree tomato)
 * Cyphostemma
 * Cypripedium (lady's slipper; an orchid genus)
 * Cyrilla
 * Cyrtanthus (fire lily)
 * Cyrtomium
 * Cyrtostachys
 * Cystopteris (bladder fern)
 * Cytisus (broom)

D

 * Daboecia
 * Dacrydium
 * Dactylis
 * Dactylorhiza (marsh orchid)
 * Dahlia
 * Dalea (indigo bush)
 * Dalechampia
 * Damasonium
 * Dampiera
 * Danae
 * Daphne
 * Daphniphyllum
 * Darlingia
 * Darmera syn. Peltiphyllum
 * Darwinia (lemon scented myrtle)
 * Dasylirion
 * Datura
 * Davallia (hare's foot fern)
 * Davidia
 * Daviesia
 * Decaisnea
 * × Degarmoara (a hybrid orchid genus)
 * Decarya
 * Decumaria
 * Deinanthe
 * Delairea
 * Delonix
 * Delosperma
 * Delphinium
 * Dendranthema
 * Dendrobium (an orchid genus)
 * Dendrocalamus
 * Dendrochilum (an orchid genus)
 * Dendromecon (tree poppy)
 * Denmoza
 * Dennstaedtia (Hayscented fern or Cup fern)
 * Deppea
 * Derris
 * Derwentia
 * Deschampsia (hair grass)
 * Desfontainia
 * Desmodium
 * Deuterocohnia syn. Abromeitiella
 * Deutzia
 * Dianella (flax lily)
 * Dianthus (carnation, pink)
 * Diascia (twinspur)
 * Dicentra (bleeding heart)
 * Dichelostemma
 * Dichondra
 * Dichorisandra
 * Dichroa
 * Dicksonia
 * Dicliptera
 * Dictamnus (burning bush, dittany)
 * Dictyosperma (princess palm)
 * Didymochlaena
 * Dieffenbachia (dumb cane, mother-in-law's tongue, tuftroot)
 * Dierama (African harebell, angel's fishing rod, wand flower)
 * Diervilla (bush honeysuckle)
 * Dietes
 * Digitalis (foxglove)
 * Dillenia
 * Dillwynia
 * Dimorphotheca (African daisy)
 * Dionaea (Venus flytrap)
 * Dionysia
 * Dioon
 * Dioscorea syns. Rajania, Tamus, Testudinaria(yam)
 * Diospyros (ebony, persimmon)
 * Dipcadi
 * Dipelta
 * Diphylleia
 * Diplarrhena (butterfly flag)
 * Diplazium
 * Diplocyclos
 * Diploglottis
 * Diplolaena
 * Dipsacus (teasel)
 * Dipteris
 * Dipteronia
 * Dipteryx
 * Dirca (leatherwood)
 * Disa (an orchid genus)
 * Disanthus
 * Discaria
 * Dischidia
 * Discocactus
 * Disocactus
 * Disporopsis
 * Disporum (fairy-bells)
 * Dissotis
 * Distictis
 * Distylium
 * Dizygotheca
 * Docynia
 * Dodecatheon (shooting stars, American cowslip), now Primula sect. Dodecatheon
 * Dodonaea (hop bush)
 * Dolichandrone
 * Dombeya
 * Doodia (hacksaw fern, rasp fern)
 * Doronicum (leopard's bane)
 * Dorotheanthus (ice plant, Livingstone daisy)
 * Dorstenia
 * Doryanthes (spear lily)
 * Doryopteris
 * Dovyalis
 * Draba (whitlow grass)
 * Dracaena
 * Dracocephalum
 * Dracophyllum
 * Dracula (an orchid genus)
 * Dracunculus
 * Drimys
 * Drosanthemum
 * Drosera (sundew)
 * Dryandra
 * Dryas (mountain avens)
 * Drynaria
 * Dryopteris (buckler fern, shield fern, wood fern)
 * Duboisia
 * Duchesnea (Indian strawberry, mock strawberry)
 * Dudleya
 * Duranta
 * Duvalia
 * Dyckia
 * Dymondia
 * Dypsis syn. Chrysalidocarpus, Neodypsis

E

 * Ebracteola
 * Ecballium
 * Eccremocarpus
 * Echeveria
 * Echidnopsis
 * Echinacea (coneflower)
 * Echinocactus
 * Echinocereus
 * Echinops (globe thistle)
 * Echinopsis
 * Echium
 * Edgeworthia
 * Edithcolea
 * Edraianthus
 * Egeria
 * Ehretia
 * Eichhornia (water hyacinth)
 * Elaeagnus
 * Elaeis (oil palm)
 * Elaeocarpus
 * Elatostema
 * Eleocharis (spike rush)
 * Elettaria
 * Eleutherococcus
 * Elodea (pondweed)
 * Elsholtzia
 * Elymus (wild rye)
 * Embothrium
 * Emilia (tasselflower)
 * Emmenopterys
 * Encelia
 * Encephalartos (Kaffir bread)
 * Encyclia (an orchid genus)
 * Enkianthus
 * Ensete
 * Eomecon (snow poppy)
 * Epacris
 * Ephedra (ephedra)
 * Epidendrum (an orchid genus)
 * Epigaea
 * Epilobium
 * Epimedium (barrenwort)
 * Epipactis (helleborine, an orchid genus)
 * Epiphyllum (orchid cactus)
 * Episcia (flame violet)
 * Epithelantha
 * Equisetum (horsetail)
 * Eragrostis (love grass)
 * Eranthemum
 * Eranthis (winter aconite)
 * Ercilla
 * Eremophila (emu bush)
 * Eremurus
 * Erica (heath/heather)
 * Erigeron (fleabane)
 * Erinacea
 * Erinus
 * Eriobotrya
 * Eriogonum
 * Eriophorum (cotton grass)
 * Eriophyllum
 * Eriostemon (waxflower)
 * Eritrichium
 * Erodium
 * Eryngium (eryngo, sea holly)
 * Erysimum (wallflower)
 * Erythrina (coral tree)
 * Erythronium
 * Escallonia
 * Eschscholzia (California poppy)
 * Escobaria
 * Espostoa
 * Etlingera
 * Eucalyptus (gum tree, ironbark)
 * Eucharis
 * Eucomis
 * Eucommia
 * Eucryphia
 * Eulophia (an orchid genus)
 * Euonymus
 * Eupatorium
 * Euphorbia (spurge)
 * Euptelea
 * Eurya
 * Euryale ferox
 * Euryops
 * Eustoma
 * Evolvulus
 * Exacum
 * Exochorda

F

 * Fabiana
 * Fagus (beech)
 * Fallopia
 * Farfugium
 * Fargesia
 * Fascicularia
 * × Fatshedera (hybrid genus)
 * Fatsia
 * Faucaria
 * Felicia (blue daisy)
 * Fendlera
 * Fenestraria
 * Ferocactus
 * Ferraria
 * Ferula (giant fennel)
 * Festuca (fescue)
 * Fibigia
 * Ficus (fig)
 * Ficus pumila
 * Filipendula
 * Firmiana
 * Fittonia
 * Fitzroya
 * Fockea
 * Foeniculum (fennel)
 * Fontanesia
 * Forsythia
 * Fortunella (kumquat)
 * Fothergilla
 * Fouquieria
 * Fragaria (strawberry)
 * Frailea
 * Francoa
 * Frangipani
 * Franklinia
 * Fraxinus (ash)
 * Freesia
 * Fremontodendron
 * Fritillaria (fritillary)
 * Fuchsia
 * Furcraea

G

 * Gagea
 * Gaillardia
 * Galanthus (snowdrop)
 * Galax
 * Galega
 * Galium (bedstraw)
 * Galtonia
 * Gardenia
 * Garrya
 * Gasteria
 * Gaultheria
 * Gaura
 * Gaylussacia (huckleberry)
 * Gazania
 * Geissorhiza
 * Gelsemium
 * Genista
 * Gentiana (gentian)
 * Gentianopsis
 * Geranium (cranesbill, not same as Pelargonium)
 * Gerbera
 * Gesneria
 * Geum (avens)
 * Gevuina
 * Gibbaeum
 * Gilia
 * Gillenia
 * Ginkgo
 * Gladiolus
 * Glaucidium
 * Glaucium
 * Gleditsia (honey locust)
 * Globba
 * Globularia (globe daisy)
 * Gloriosa
 * Glottiphyllum
 * Gloxinia
 * Glyceria
 * Glycyrrhiza
 * Gomphocarpus
 * Gomphrena
 * Goniolimon
 * Goodyera (jewel orchid)
 * Gordonia
 * Graptopetalum
 * Graptophyllum
 * Graptoveria (hybrid genus)
 * Grevillea
 * Grewia
 * Greyia
 * Grindelia
 * Griselinia
 * Gunnera (dinosaur food)
 * Guzmania
 * Gymnocalycium
 * Gymnocarpium
 * Gymnocladus
 * Gynandriris
 * Gynura
 * Gypsophila

H

 * Haageocereus
 * Haastia
 * Habenaria (an orchid genus)
 * Haberlea
 * Habranthus
 * Haemanthus (blood lily)
 * Hakea
 * Hakonechloa
 * Halesia (silverbell)
 * Halimiocistus (hybrid genus)
 * Halimium
 * Halimodendron
 * Hamamelis (witch-hazel)
 * Haplopappus
 * Hardenbergia (coral pea)
 * Harrisia
 * Hatiora
 * Haworthia
 * Hebe
 * Hechtia
 * Hedera (ivy)
 * Hedychium
 * Hedyotis (bluets)
 * Hedysarum
 * Hedyscepe (umbrella palm)
 * Helenium (sneezeweed)
 * Helianthemum (rock rose)
 * Helianthus (sunflower)
 * Helichrysum
 * Heliconia
 * Helictotrichon
 * Heliocereus
 * Heliophila
 * Heliopsis (ox eye)
 * Heliotropium (heliotrope)
 * Helleborus (hellebore)
 * Heloniopsis
 * Hemerocallis (daylily)
 * Hemigraphis
 * Hepatica
 * Heptacodium
 * Heracleum
 * Herbertia
 * Hereroa
 * Hermannia
 * Hermodactylus
 * Hesperaloe
 * Hesperantha
 * Hesperis
 * Hesperocallis
 * Heterocentron
 * Heterotheca
 * Heuchera (coral flower)
 * × Heucherella (hybrid genus)
 * Hibbertia
 * Hibiscus (rose of Sharon)
 * Hieracium (hawkweed)
 * Himalayacalamus
 * Hippeastrum (amaryllis)
 * Hippocrepis
 * Hippophae
 * Hohenbergia
 * Hohenbergiopsis
 * Hoheria
 * Holboellia
 * Holcus
 * Holmskioldia
 * Holodiscus
 * Homalocladium (ribbon bush)
 * Homeria
 * Hoodia
 * Hordeum (barley)
 * Horminum
 * Hosta (plantain lily)
 * Hottonia
 * Houttuynia
 * Hovea
 * Hovenia
 * Howea (sentry palm)
 * Hoya (wax flower)
 * Huernia
 * Humulus (hops)
 * Hunnemannia
 * Huntleya an orchid genus
 * Hyacinthella
 * Hyacinthoides
 * Hyacinthus (hyacinth)
 * Hydrangea
 * Hydrastis (goldenseal)
 * Hydrocharis (frogbit)
 * Hydrocleys
 * Hydrocotyle (pennywort)
 * Hygrophila
 * Hylocereus
 * Hylomecon
 * Hymenocallis
 * Hymenosporum
 * Hyophorbe (bottle palm)
 * Hyoscyamus (henbane)
 * Hypericum (St. John's wort, rose of Sharon)
 * Hyphaene (doum palm)
 * Hypocalymma
 * Hypoestes
 * Hypoxis (starflower)
 * Hypsela
 * Hyssopus (hyssop)

I

 * Iberis (candytuft)
 * Ibervillea
 * Idesia
 * Ilex (holly)
 * Illicium
 * Impatiens (balsam)
 * Imperata
 * Incarvillea
 * Indigofera
 * Inula
 * Iochroma
 * Ipheion
 * Ipomoea (morning glory)
 * Ipomopsis
 * Iresine
 * Iris
 * Isatis
 * Isoplexis
 * Isopyrum
 * Itea
 * Ixia (corn lily)
 * Ixiolirion
 * Ixora

J

 * Jaborosa
 * Jacaranda
 * Jacquemontia
 * Jamesia
 * Jasione
 * Jasminum (jasmine, jessamine)
 * Jatropha
 * Jeffersonia
 * Jovellana
 * Jovibarba
 * Juanulloa
 * Jubaea (Chilean wine palm)
 * Juglans (walnut)
 * Juncus (rush)
 * Juniperus (juniper)
 * Justicia

K

 * Kadsura
 * Kaempferia
 * Kalanchoe
 * Kalimeris
 * Kalmia (mountain laurel)
 * Kalmiopsis
 * Kalopanax
 * Kelseya
 * Kerria
 * Kigelia (sausage tree)
 * Kirengeshoma
 * Kitaibela
 * Kleinia
 * Knautia
 * Knightia
 * Kniphofia
 * Koeleria (junegrass)
 * Koelreuteria (golden rain tree)
 * Kohleria
 * Kolkwitzia (beautybush)
 * Kosteletzkya
 * Kunzea

L

 * Lablab
 * Laburnocytisus
 * Laburnum (laburnum)
 * Laccospadix
 * Lachenalia (Cape cowslip)
 * Laelia (an orchid genus)
 * × Laeliocattleya (hybrid orchid genus)
 * Lagarosiphon
 * Lagenophora
 * Lagerstroemia
 * Lagunaria
 * Lagurus
 * Lamarckia
 * Lambertia
 * Lamium (deadnettle)
 * Lampranthus
 * Lantana (shrub verbena)
 * Lapageria
 * Lardizabala
 * Larix (larch)
 * Larrea (creosote bush)
 * Latania (Latan palm)
 * Lathraea
 * Lathyrus
 * Laurelia
 * Laurus
 * Lavandula (lavender)
 * Lavatera (mallow)
 * Lawsonia
 * Layia
 * Ledebouria
 * Ledodendron (hybrid genus)
 * Ledum
 * Leea
 * Legousia
 * Leiophyllum
 * Leipoldtia
 * Leitneria
 * Lemboglossum
 * Lenophyllum
 * Leonotis
 * Leontice
 * Leontopodium (edelweiss)
 * Lepidozamia
 * Leptinella
 * Lechenaultia
 * Lespedeza (bush clover)
 * Leucadendron
 * Leucanthemella
 * Leucanthemopsis
 * Leucanthemum
 * Leuchtenbergia
 * Leucocoryne
 * Leucogenes
 * Leucojum (snowflake)
 * Leucophyllum
 * Leucophyta
 * Leucopogon
 * Leucoraoulia (hybrid genus)
 * Leucospermum (pincushion)
 * Leucothoe
 * Lewisia
 * Leycesteria
 * Leymus
 * Liatris
 * Libertia
 * Libocedrus
 * Ligularia
 * Ligustrum (privet)
 * Lilium (lily)
 * Limnanthes
 * Limnocharis
 * Limonium (sea lavender)
 * Linanthus
 * Linaria (toadflax)
 * Lindelofia
 * Lindera
 * Lindheimera (star daisy)
 * Linnaea (twinflower)
 * Linospadix
 * Linum (flax)
 * Liquidambar (sweetgum)
 * Liriodendron (tulip tree)
 * Liriope (lilyturf)
 * Lithocarpus
 * Lithodora
 * Lithophragma
 * Lithops
 * Littonia
 * Livistona
 * Loasa
 * Lobelia
 * Lobularia (sweet alyssum)
 * Lodoicea (coco de mer)
 * Loiseleuria
 * Lomandra (mat rush)
 * Lomatia
 * Lomatium
 * Lomatophyllum
 * Lonicera (honeysuckle)
 * Lopezia
 * Lophomyrtus
 * Lophospermum
 * Lophostemon
 * Loropetalum
 * Lotus
 * Luculia
 * Ludwigia
 * Luma
 * Lunaria
 * Lupinus (lupin)
 * Luzula (woodrush)
 * Lycaste (an orchid genus)
 * Lychnis (campion)
 * Lycium
 * Lycopodium (club moss)
 * Lycoris
 * Lygodium (climbing fern)
 * Lyonia
 * Lyonothamnus
 * Lysichiton (yellow skunk cabbage)
 * Lysiloma
 * Lysimachia
 * Lythrum (loosestrife)

M

 * Maackia
 * Macfadyena
 * Machaeranthera
 * Mackaya
 * Macleania
 * Macleaya
 * Maclura
 * Macropidia
 * Macrozamia
 * Magnolia
 * Mahonia
 * Maianthemum (May lily)
 * Maihuenia
 * Malcolmia
 * Malephora
 * Malope
 * Malpighia
 * Malus (apple, crabapple)
 * Malva (mallow)
 * Malvastrum
 * Malvaviscus
 * Mammillaria
 * Mandevilla
 * Mandragora (mandrake)
 * Manettia
 * Manglietia
 * Maranta
 * Margyricarpus
 * Marrubium (horehound)
 * Marsilea (pepperwort)
 * Masdevallia (an orchid genus)
 * Matteuccia
 * Matthiola (stock)
 * Maurandella
 * Maurandya
 * Maxillaria (an orchid genus)
 * Maytenus
 * Mazus
 * Meconopsis
 * Medicago (alfalfa)
 * Medinilla
 * Meehania
 * Megacodon
 * Megaskepasma
 * Melaleuca (paperbark)
 * Melasphaerula
 * Melastoma
 * Melia
 * Melianthus
 * Melica (melic)
 * Melicytus
 * Melinis
 * Meliosma
 * Melissa (balm)
 * Melittis (bastard balm)
 * Melocactus
 * Menispermum (moonseed)
 * Mentha (mint)
 * Mentzelia (starflower)
 * Menyanthes
 * Menziesia
 * Merendera
 * Merremia
 * Mertensia
 * Mespilus
 * Metasequoia (dawn redwood)
 * Metrosideros
 * Meum
 * Mexicoa
 * Michauxia
 * Michelia
 * Microbiota
 * Microcachrys
 * Microlepia
 * Micromeria
 * Mikania
 * Milium
 * Milla
 * Millettia
 * Miltonia (an orchid genus)
 * Miltoniopsis (pansy orchid)
 * Mimetes
 * Mimosa (mimosa, or sensitive plant)
 * Mimulus (monkey flower)
 * Mirabilis
 * Miscanthus
 * Mitchella (partridge berry)
 * Mitella
 * Mitraria
 * Molinia
 * Moltkia
 * Moluccella
 * Monadenium
 * Monanthes
 * Monarda (bee balm)
 * Monardella
 * Monstera
 * Moraea
 * Morina
 * Morisia
 * Morus (mulberry)
 * Mucuna
 * Muehlenbeckia
 * Mukdenia
 * Musa (banana, plantain)
 * Muscari (grape hyacinth)
 * Mussaenda
 * Mutisia
 * Myoporum
 * Myosotidium
 * Myosotis (forget-me-not)
 * Myrica
 * Myriophyllum (milfoil)
 * Myrrhis (sweet cicely)
 * Myrsine
 * Myrteola
 * Myrtillocactus
 * Myrtus (myrtle)

N

 * Nandina (heavenly bamboo)
 * Narcissus (daffodil)
 * Nasturtium (watercress)
 * Nautilocalyx
 * Nectaroscordum
 * Neillia
 * Nelumbo (lotus)
 * Nematanthus
 * Nemesia
 * Nemopanthus (mountain holly)
 * Nemophila
 * Neobuxbaumia
 * Neolitsea
 * Neolloydia
 * Neomarica
 * Neoporteria
 * Neoregelia
 * Nepenthes (pitcher plant)
 * Nepeta (catmint)
 * Nephrolepis
 * Nerine
 * Nerium (oleander)
 * Nertera
 * Nicandra
 * Nicotiana (tobacco)
 * Nidularium
 * Nierembergia
 * Nigella
 * Nipponanthemum
 * Nolana
 * Nomocharis
 * Nopalxochia
 * Nothofagus (southern beech)
 * Notholirion
 * Nothoscordum (false garlic)
 * Notospartium
 * Nuphar (spatterdock)
 * Nymania
 * Nymphaea (waterlily)
 * Nymphoides (floating heart)
 * Nyssa (tupelo)

O

 * Obregonia
 * Ochagavia
 * Ochna
 * Ocimum
 * × Odontioda (hybrid orchid genus)
 * × Odontocidium (hybrid orchid genus)
 * Odontoglossum (an orchid genus)
 * Odontonema
 * × Odontonia (hybrid orchid genus)
 * Oemleria
 * Oenanthe (water dropwort)
 * Oenothera (evening primrose, sundrops)
 * Olea (olive)
 * Olearia (daisy bush)
 * Olneya
 * Olsynium
 * Omphalodes (navelwort)
 * Omphalogramma
 * Oncidium (an orchid genus)
 * Onoclea
 * Ononis (restharrow)
 * Onopordum
 * Onosma
 * Oophytum
 * Ophiopogon (lilyturf)
 * Ophrys (an orchid genus)
 * Oplismenus
 * Opuntia (prickly pears, chollas and many other cactus species)
 * Orbea
 * Orbeopsis
 * Orchis (an orchid genus)
 * Oreocereus
 * Origanum (marjoram, oregano)
 * Orixa
 * Ornithogalum
 * Orontium (golden club)
 * Orostachys
 * Oroya
 * Ortegocactus
 * Orthophytum
 * Orthrosanthus
 * Orychophragmus
 * Oryza (rice)
 * Osbeckia
 * Osmanthus
 * Osmunda (royal fern)
 * Osteomeles
 * Osteospermum
 * Ostrowskia (giant bellflower)
 * Ostrya
 * Othonna
 * Ourisia
 * Oxalis (shamrock, sorrel)
 * Oxydendrum
 * Oxypetalum
 * Ozothamnus

P

 * Pachistima
 * Pachycereus
 * Pachycormus
 * Pachycymbium
 * Pachyphragma
 * Pachyphytum
 * Pachypodium
 * Pachysandra
 * Pachystachys
 * Pachystegia
 * Pachystima
 * Pachyveria (hybrid genus)
 * Paeonia (peony)
 * Paliurus
 * Pamianthe
 * Panax (ginseng)
 * Pancratium (sea lily)
 * Pandanus (screw pine)
 * Pandorea
 * Panicum
 * Pansy 
 * Papaver (poppy)
 * Paphiopedilum (slipper orchid)
 * Paradisea (paradise lily)
 * Parahebe
 * Paraquilegia
 * Parkinsonia
 * Parnassia
 * Parochetus
 * Parodia
 * Paronychia
 * Parrotia
 * Parrotiopsis
 * Parthenocissus
 * Passiflora (granadilla, passionflower)
 * Patersonia
 * Patrinia
 * Paulownia
 * Paurotis
 * Pavonia
 * Pedilanthus
 * Pediocactus
 * Pelargonium (geranium)
 * Pellaea
 * Peltandra (arrow arum)
 * Peltoboykinia
 * Peltophorum
 * Peniocereus
 * Pennisetum
 * Penstemon
 * Pentachondra
 * Pentaglottis
 * Pentas
 * Peperomia
 * Peraphyllum
 * Pereskia
 * Perezia
 * Pericallis
 * Perilla
 * Periploca
 * Perovskia (now included in Salvia)
 * Pernettya (now included in Gaultheria)
 * Persea
 * Persicaria (fleeceflower, knotweed)
 * Petasites (butterbur, sweet coltsfoot)
 * Petrea
 * Petrocosmea
 * Petrophile
 * Petrophytum
 * Petrorhagia
 * Petroselinum (parsley)
 * Petteria
 * Petunia
 * Phacelia
 * Phaedranassa (queen lily)
 * Phaius (an orchid genus)
 * Phalaenopsis (moth orchid)
 * Phalaris
 * Phebalium
 * Phegopteris (beech fern)
 * Phellodendron (cork tree)
 * Philadelphus (mock orange)
 * Philageria (hybrid genus)
 * Philesia
 * Phillyrea
 * Philodendron
 * Phlebodium
 * Phlomis
 * Phlox
 * Phoenix (date palm)
 * Phormium
 * Photinia
 * Phragmipedium (an orchid genus)
 * Phragmites (reed)
 * Phuopsis
 * Phygelius
 * Phylica (Cape myrtle)
 * × Phylliopsis (hybrid genus)
 * Phyllocladus (toatoa)
 * Phyllodoce
 * Phyllostachys
 * Phyllothamnus (hybrid genus)
 * Physalis (ground cherry)
 * Physaria (bladderpod)
 * Physocarpus
 * Physoplexis
 * Physostegia
 * Phyteuma
 * Phytolacca (pokeweed)
 * Picea (spruce)
 * Picrasma
 * Pieris
 * Pilea
 * Pileostegia
 * Pilosella
 * Pilosocereus
 * Pimelea
 * Pimpinella
 * Pinanga
 * Pinckneya
 * Pinellia
 * Pinguicula (butterwort)
 * Pinus (pine)
 * Piper (pepper)
 * Piptanthus
 * Pisonia
 * Pistacia (pistachio)
 * Pistia
 * Pitcairnia
 * Pithecellobium
 * Pittosporum
 * Pityrogramma
 * Plantago (plantain)
 * Platanus (plane tree, sycamore)
 * Platycarya
 * Platycerium (staghorn fern)
 * Platycladus (Chinese arborvitae)
 * Platycodon (balloon flower)
 * Platystemon (creamcups)
 * Plectranthus an orchid genus
 * Pleioblastus
 * Pleione (an orchid genus)
 * Pleiospilos (living granite)
 * Pleurothallis (an orchid genus)
 * Plumeria (frangipani)
 * Poa
 * Podalyria
 * Podocarpus
 * Podophyllum (mayapple)
 * Podranea
 * Polemonium (jacob's ladder, abscess root)
 * Polianthes
 * Poliothyrsis
 * Polygala (milkwort, seneca, snakeroot)
 * Polygonatum
 * Polygonum (knotweed, knotgrass)
 * Polypodium
 * Polyscias
 * Polystichum
 * Poncirus
 * Pongamia
 * Pontederia (pickerel weed)
 * Populus (aspen, poplar, cottonwood)
 * Porana
 * Portea
 * Portulaca (purslane, moss rose)
 * Portulacaria
 * Posoqueria
 * Potamogeton
 * Potentilla (cinquefoil)
 * Pothos
 * × Potinara (hybrid orchid genus)
 * Pratia
 * Primula (primrose)
 * Prinsepia
 * Pritchardia
 * Proboscidea (unicorn plant)
 * Promenaea an orchid genus
 * Prosopis (mesquite)
 * Prostanthera (mint bush)
 * Protea
 * Prumnopitys
 * Prunella (self-heal)
 * Prunus (almond, apricot, cherry, peach, plum)
 * Pseuderanthemum
 * Pseudocydonia
 * Pseudolarix (golden-larch)
 * Pseudopanax
 * Pseudosasa
 * Pseudotsuga (douglas-fir)
 * Pseudowintera
 * Psilotum
 * Psychopsis (butterfly orchid)
 * Psylliostachys (statice)
 * Ptelea
 * Pteris (brake, table fern)
 * Pterocactus
 * Pterocarya (wingnut)
 * Pteroceltis
 * Pterocephalus
 * Pterodiscus
 * Pterostyrax
 * Ptilotus
 * Ptychosperma
 * Pueraria
 * Pulmonaria (lungwort)
 * Pulsatilla
 * Pultenaea
 * Punica (pomegranate)
 * Purshia
 * Puschkinia
 * Putoria
 * Puya
 * Pycnanthemum
 * Pycnostachys
 * Pyracantha (firethorn)
 * Pyrola (wintergreen)
 * Pyrostegia
 * Pyrrosia
 * Pyrus (pear)

Q

 * Quamoclit
 * Quaqua
 * Quercus (oak)
 * Quesnelia
 * Quisqualis
 * Quince

R

 * Ramonda
 * Ranunculus (buttercup, crowfoot)
 * Ranzania
 * Raoulia
 * Raphia (raffia)
 * Ratibida
 * Ravenala (traveler's tree)
 * Rebutia
 * Rehderodendron
 * Rehmannia
 * Reineckea
 * Reinwardtia
 * Reseda (Mignonette)
 * Retama
 * Rhamnus
 * Rhaphidophora
 * Rhaphiolepis
 * Rhapidophyllum (needle palm)
 * Rhapis (lady palm)
 * Rheum (rhubarb)
 * Rhexia
 * Rhipsalis
 * Rhodanthe (strawflower)
 * Rhodanthemum
 * Rhodiola
 * Rhodochiton
 * Rhododendron
 * Rhodohypoxis
 * Rhodophiala
 * Rhodothamnus
 * Rhodotypos
 * Rhoeo
 * Rhoicissus
 * Rhombophyllum
 * Rhus (sumac)
 * Rhynchelytrum
 * Rhynchostylis (an orchid genus)
 * Ribes (currant)
 * Richea
 * Ricinus (castor-oil plant)
 * Rigidella
 * Robinia
 * Rodgersia
 * Rodriguezia an orchid genus
 * Rohdea
 * Romanzoffia
 * Romneya (Matilija poppy, tree poppy)
 * Romulea
 * Rondeletia
 * Rosa (rose)
 * Roscoea
 * Rosmarinus (rosemary)
 * Rossioglossum an orchid genus
 * Rothmannia
 * Roystonea (royal palm)
 * Rubus (raspberry)
 * Rudbeckia (coneflower)
 * Ruellia
 * Rumex (dock)
 * Rumohra
 * Rupicapnos
 * Ruschia
 * Ruscus
 * Russelia
 * Ruta (rue)

S

 * Sabal (palmetto)
 * Saccharum (plume grass, sugar cane)
 * Sadleria
 * Sagina (pearlwort)
 * Sagittaria (arrowhead)
 * Salix (willow)
 * Salpiglossis
 * Salvia (sage)
 * Salvinia
 * Sambucus (elder)
 * Sanchezia
 * Sandersonia
 * Sanguinaria (bloodroot)
 * Sanguisorba (burnet)
 * Sanicula
 * Sansevieria
 * Santolina
 * Sanvitalia (creeping zinnia)
 * Sapindus
 * Sapium (tallow tree)
 * Saponaria (soapwort)
 * Sarcocapnos
 * Sarcocaulon
 * Sarcococca
 * Saritaea, see Bignonia magnifica
 * Sarmienta
 * Sarracenia (pitcher plant)
 * Sasa
 * Sassafras
 * Satureja (savory)
 * Sauromatum
 * Saxegothaea
 * Saxifraga (saxifrage)
 * Scabiosa (scabious plant)
 * Scadoxus (blood lily)
 * Scaevola
 * Schefflera
 * Schima
 * Schinus
 * Schisandra
 * Schizachyrium
 * Schizanthus
 * Schizopetalon
 * Schizophragma
 * Schizostylis
 * Schlumbergera
 * Schoenoplectus
 * Schomburgkia an orchid genus
 * Schotia
 * Schwantesia
 * Sciadopitys
 * Scilla (including the former genus Chionodoxa)
 * Scindapsus
 * Scirpoides
 * Sclerocactus
 * Scoliopus
 * Scopolia
 * Scrophularia (figwort)
 * Scutellaria
 * Securinega
 * Sedum (stonecrop)
 * Selaginella
 * Selago
 * Selenicereus
 * Selinum
 * Semele
 * Semiaquilegia
 * Semiarundinaria
 * Sempervivum (hens and chicks)
 * Senecio (ragwort)
 * Senna
 * Sequoia (coast redwood)
 * Sequoiadendron (giant sequoia)
 * Seriphidium
 * Serissa
 * Serruria
 * Sesbania
 * Sesleria
 * Setaria
 * Shepherdia
 * Shibataea
 * Shortia
 * Sibiraea
 * Sidalcea
 * Sideritis
 * Silene (campion)
 * Silphium
 * Silybum
 * Simmondsia (jojoba)
 * Sinningia
 * Sinofranchetia
 * Sinojackia
 * Sinowilsonia
 * Sisyrinchium
 * Skimmia
 * Smilacina
 * Smilax
 * Smithiantha
 * Smyrnium
 * Sobralia an orchid genus
 * Solandra
 * Solanum (potato, nightshade)
 * Soldanella (snowbell)
 * Soleirolia
 * Solenopsis
 * Solenostemon
 * Solidago (goldenrod)
 * Solidaster (supposedly hybrid genus; see Solidago)
 * Sollya
 * Sonerila
 * Sophora
 * × Sophrolaeliocattleya (trigeneric hybrid orchid)
 * Sophronitis (an orchid genus)
 * Sorbaria
 * Sorbus (rowan, whitebeam)
 * Sorghastrum
 * Sparaxis
 * Sparganium (bur-reed)
 * Sparrmannia
 * Spartina (cord grass)
 * Spartium (broom)
 * Spathiphyllum
 * Spathodea
 * Sphaeralcea
 * Spigelia
 * Spiraea (spirea)
 * Sprianthes (an orchid genus)
 * Sporobolus
 * Sprekelia
 * Stachys (betony)
 * Stachyurus
 * Stangeria
 * Stanhopea (an orchid genus)
 * Stapelia
 * Stapelianthus
 * Staphylea (bladdernut)
 * Stauntonia
 * Stenanthium
 * Stenocactus
 * Stenocarpus
 * Stenocereus
 * Stenomesson
 * Stenotaphrum
 * Stenotus
 * Stephanandra
 * Stephanocereus
 * Stephanotis
 * Sternbergia
 * Stigmaphyllon
 * Stipa
 * Stokesia
 * Stomatium
 * Stratiotes
 * Strelitzia (bird of paradise)
 * Streptocarpus (Cape primrose)
 * Streptosolen
 * Strobilanthes
 * Stromanthe
 * Strombocactus
 * Strongylodon
 * Stuartia
 * Stylidium
 * Stylophorum
 * Styphelia
 * Styrax
 * Succisa
 * Sulcorebutia
 * Sutera
 * Sutherlandia
 * Swainsona
 * Swainsonia
 * Syagrus
 * Sycoparrotia (hybrid genus)
 * Sycopsis
 * Symphoricarpos (snowberry)
 * Symphyandra
 * Symphytum (comfrey)
 * Symplocos
 * Synadenium
 * Syneilesis
 * Syngonium
 * Synthyris
 * Syringa (lilac)
 * Syzygium (rose apple)

T

 * Tabebuia
 * Tabernaemontana
 * Tacca
 * Tagetes (Mexican or French marigold)
 * Talinum (fameflower)
 * Tamarix (tamarisk)
 * Tanacetum (tansy)
 * Tanakaea
 * Tapeinochilos
 * Taxodium (bald cypress)
 * Taxus (yew)
 * Tecoma
 * Tecomanthe
 * Tecomaria
 * Tecophilaea
 * Telekia
 * Telephium
 * Tellima
 * Telopea (waratah)
 * Templetonia
 * Terminalia
 * Ternstroemia
 * Tetracentron
 * Tetradium (bee tree)
 * Tetranema
 * Tetraneuris
 * Tetrapanax
 * Tetrastigma
 * Tetratheca
 * Teucrium
 * Thalia
 * Thalictrum
 * Thelesperma
 * Thelocactus
 * Thelypteris
 * Thermopsis
 * Thespesia
 * Thevetia
 * Thlaspi
 * Thrinax (thatch palm)
 * Thryptomene (heath myrtle)
 * Thuja (thuja, arborvitae)
 * Thujopsis (hiba)
 * Thunbergia
 * Thymophylla
 * Thymus (thyme)
 * Tiarella
 * Tibouchina
 * Tigridia
 * Tilia (linden)
 * Tillandsia (air plant, Spanish moss)
 * Tipuana
 * Titanopsis
 * Tithonia (Mexican sunflower)
 * Todea
 * Tolmiea
 * Tolpis
 * Toona
 * Torenia
 * Torreya (nutmeg yew)
 * Tovara
 * Townsendia
 * Trachelium
 * Trachelium caeruleum (blue throatwort)
 * Trachelospermum
 * Trachycarpus (chusan palm)
 * Trachymene
 * Tradescantia (spiderwort)
 * Trapa (water caltrop)
 * Trichodiadema
 * Trichosanthes
 * Tricyrtis (toad lily)
 * Trientalis
 * Trifolium (clover)
 * Trillium
 * Tripetaleia
 * Tripterygium
 * Triteleia (triplet lily)
 * Tritonia
 * Trochodendron
 * Trollius (globeflower)
 * Tropaeolum (nasturtium)
 * Tsuga (hemlock)
 * Tsusiophyllum
 * Tuberaria
 * Tulbaghia
 * Tulipa (tulip)
 * Tweedia
 * Tylecodon
 * Typha (cattail)

U

 * Uebelmannia
 * Ugni
 * Ulex (gorse)
 * Ulmus (elm)
 * Umbellularia
 * Uncinia
 * Uniola
 * Urceolina
 * Urginea
 * Ursinia
 * Utricularia (bladderwort)
 * Uvularia (merrybells, bellwort)

V

 * Valeriana (garden valerian)
 * Vallea
 * Vancouveria
 * Vanda (an orchid genus)
 * Vanilla an orchid genus
 * Veitchia
 * Vellozia
 * Veltheimia
 * Veratrum
 * Verbascum (mullein)
 * Verbena
 * Vernonia (ironweed)
 * Veronica (speedwell)
 * Veronicastrum
 * Verticordia
 * Vestia
 * Viburnum
 * Victoria (giant waterlily)
 * Vigna (cowpea and various beans)
 * Viguiera
 * Vinca (periwinkle)
 * Viola (pansy, violet)
 * Virgilia
 * Viscaria
 * Vitaliana
 * Vitex
 * Vitis (grape)
 * Vriesea

W

 * Wachendorfia
 * Wahlenbergia
 * Waldsteinia
 * Washingtonia
 * Watsonia
 * Weberocereus
 * Wedelia
 * Weigela
 * Weingartia
 * Weldenia
 * Welwitschia
 * Westringia
 * Widdringtonia
 * Wigandia
 * Wigginsia
 * Wikstroemia
 * Wilsonaria (hybrid orchid genus)
 * Wisteria
 * Wittrockia
 * Wolffia
 * Woodsia
 * Woodwardia (chain fern)
 * Worsleya
 * Wulfenia

X

 * Xanthoceras
 * Xanthorhiza
 * Xanthosoma
 * Xeranthemum
 * Xerophyllum
 * Xylosma

Y

 * Yucca
 * Yushania

Z

 * Zaluzianskya
 * Zamia
 * Zamioculcas
 * Zantedeschia (calla lily)
 * Zanthoxylum
 * Zauschneria
 * Zea (maize)
 * Zelkova
 * Zenobia
 * Zephyranthes
 * Zigadenus
 * Zinnia
 * Zizania (wild rice)
 * Zygopetalum (an orchid genus)