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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
A
Abelia
Abrus
Acacia
Acanthocalycium
Acanthostachys
Achiote (Bixa)
Acineta
Aciphylla
Acmispon
Aconite (Aconitum)
Actinidia
Adenostyles
Adesmia
Adina
Adlumia
Adromischus
Aeonium
Aerangis
Aeranthes
Aetheopappus
African Daisy (Arctotis)
African Violet (Saintpaulia)
Afroaster
Agapanthus
Agapetes
Ageratum
Aglaomorpha
Aglaonema
Agrostis
Aichryson
Air Pine (Aechmea)
Albertia
Albizia
Albuca
Alcantarea
Alder (Alnus)
Alder, White (Clethra)
Alepidea
Alfredia
Aliceara
Alisma
Alkanna
Allochrusa
Allspice (Pimenta)
Allspice (Calycanthus)
Alluaudia
Almond (Prunus)
Alniaria
Aloe
Aloiampelos
Aloidendron
Aloinanthus
Alpine Balsam (Erinus)
Alsobia
Alum Root (Heuchera)
Alyxia
Amaranth (Amaranthus)
Amaryllis (Hippeastrum)
Ambrosia
Amellus
Ammi
Ammocharis
Ampelopsis
Anacampseros
Anarthrophyllum
Androcymbium
Androlepis
Andryala
Aneilema
Anemone
Angel's Trumpet (Datura)
Angel's Trumpet (Brugmansia)
Angelica
Angelonia
Angulocaste
Anigozanthos
Anisacanthus
Anise (Myrrhis)
Anisodus
Annona
Anthopterus
Anthoxanthum
Anticlea
Antigonon
Antimima
Apache Plume (Fallugia)
Apios
Aponogeton
Aporophyllum
Apple (Malus)
Arachnis
Araeococcus
Aralia
Arborvitae (Thuja)
Archanthemis
Areca Palm (Areca)
Arenga
Argentina
Argylia
Argyroderma
Aria
Aristea
Arnebia
Arnica
Arnoglossum
Arpophyllum
Arrojadoa
Arrow Grass (Triglochin)
Arrowhead (Sagittaria)
Arrowsmithia
Arrowwood (Viburnum)
Arthrocereus
Artichoke (Cynara)
Artocarpus
Arum
Arundina
Asarabacca (Asarum)
Ascocenda
Ash (Fraxinus)
Asparagus (Barnardia)
Asparagus
Aspen (Populus)
Asphodelus
Aster (Symphyotrichum)
Aster (Eurybia)
Astilbe
Astilboides
Astroloba
Astrophytum
Athamanta
Athanasia
Athrixia
Atraphaxis
Aubrieta
Aucuba
Aurinia
Australian Pitcher Plant (Cephalotus)
Austrocactus
Autumn Crocus (Colchicum)
Avenella
Avens (Geum)
Avonia
Azalea (Rhododendron)
Azara
Azorella
B
Babiana
Baccharis
Ballochia
Balloon Flower (Platycodon)
Balm (Melissa)
Balsam Root (Balsamorhiza)
Bamboo (Shibataea)
Bamboo (Phyllostachys)
Bamboo (Indocalamus)
Bamboo (Fargesia)
Bamboo (Bambusa)
Banana (Musa)
Baneberry (Actaea)
Banfieldara
Banisteriopsis
Baobab (Adansonia)
Barberry (Berberis)
Barbosella
Barkeria
Barley (Hordeum)
Barneoudia
Barrel Cactus (Ferocactus)
Barren Strawberry (Waldsteinia)
Barrenwort (Epimedium)
Basil (Ocimum)
Basket of Gold (Aurinia)
Basswood (Tilia)
Bat Flower (Tacca)
Baynesia
Beak-Rush (Rhynchospora)
Beallara
Bean (Phaseolus)
Bear Grass (Dasylirion)
Bear's Breeches (Acanthus)
Bearberry (Arctostaphylos)
Beard Grass (Bothriochloa)
Beardtongue (Penstemon)
Beargrass (Camassia)
Beaucarnea
Beautyberry (Callicarpa)
Bedstraw (Galium)
Beech (Fagus)
Beechfern (Phegopteris)
Beesia
Beet (Beta)
Begonia
Belladonna Lily (Amaryllis)
Bellevalia
Bellflower (Campanula)
Bellis
Belloa
Bellwort (Uvularia)
Bergamot (Monarda)
Bergenia
Bergeranthus
Bergerocactus
Berkheya
Bermuda Grass (Cynodon)
Betonica
Betony (Stachys)
Biarum
Bidi-Bidi (Acaena)
Biebersteinia
Bifrenaria
Bigelowia
Bignonia
Biltanthus
Bindweed (Convolvulus)
Birch (Betula)
Bird-of-Paradise (Ravenala)
Birthroot (Trillium)
Birthwort (Aristolochia)
Bistorta
Bitter Root (Lewisia)
Bittercress (Cardamine)
Bittersweet (Celastrus)
Black Locust (Robinia)
Black Root (Veronicastrum)
Bladder Fern (Cystopteris)
Bladdernut (Staphylea)
Bladderwort (Utricularia)
Blanketflower (Gaillardia)
Blazing Star (Mentzelia)
Blazing-Star (Liatris)
Bleeding Heart (Dicentra)
Blepharoneuron
Blephilia
Bletilla
Blitum
Blood Lily (Haemanthus)
Blood Root (Sanguinaria)
Bloodleaf (Iresine)
Blossfeldia
Blue Star (Amsonia)
Bluebeard (Caryopteris)
Bluebell (Scilla)
Bluebell (Hyacinthoides)
Bluebells (Mertensia)
Bluegrass (Poa)
Bluestem (Schizachyrium)
Bluestem (Andropogon)
Bluff Lettuce (Dudleya)
Blumenbachia
Bog Star (Parnassia)
Bolanthus
Bolax
Bolboschoenus
Bomarea
Boneset (Eupatorium)
Bonnet Bellflower (Codonopsis)
Boophone
Borage (Borago)
Bottletree (Brachychiton)
Bouchetia
Bougainvillea
Bowiea
Bowman's Root (Gillenia)
Bowstring Hemp (Sansevieria)
Boxthorn (Lycium)
Boxwood (Buxus)
Brachychilum
Bracken Fern (Pteridium)
Brahea
Brain Cactus (Echinofossulocactus)
Brake (Pteris)
Brake, Cliff (Pellaea)
Bramble (Rubus)
Brasiliopuntia
Brassanthe
Brassavola
Brassia
Brassidium
Brassocatanthe
Brassocattleya
Brassolaelia
Brassolaeliocattleya
Brickellbush (Brickellia)
Brighamia
Brillantaisia
Brocchinia
Broccoli (Brassica)
Brome (Bromus)
Bromeliad (Bromelia)
Broom (Spartium)
Broom (Genista)
Broom (Cytisus)
Broom (Chamaecytisus)
Broughtonia
Brownea
Browningia
Brunfelsia
Brush Cherry (Syzygium)
Bryony (Bryonia)
Bryophyllum
Buckeye (Aesculus)
Buckthorn (Rhamnus)
Buckthorn (Frangula)
Buckwheat (Polygonum)
Buffalo Berry (Shepherdia)
Buffalo Grass (Buchloe)
Bugle (Ajuga)
Bugloss (Anchusa)
Bukiniczia
Bulbine
Bulbophyllum
Bulrush (Schoenoplectus)
Bur-Reed (Sparganium)
Burbidgea
Burdock (Arctium)
Burnet (Sanguisorba)
Burning Bush (Dictamnus)
Bush Clover (Lespedeza)
Butterbur (Petasites)
Buttercup (Ranunculus)
Butterfly Bush (Buddleja)
Butterwort (Pinguicula)
Button Cactus (Epithelantha)
Button Snakeroot (Liatris)
Buttonbush (Cephalanthus)
C
Cabbage (Brassica)
Cacao (Theobroma)
Caesalpinia
Cahuzacara
Caiophora
Calamint (Calamintha)
Calamintha (Acinos)
Calamovilfa
Calanthe
Calathea
Calibanus
California Lilac (Ceanothus)
California Poppy (Eschscholzia)
Calla Lily (Zantedeschia)
Callianthemum
Callitropsis
Calocedrus
Calycera
Calyptridium
Calyptrocalyx
Camas (Camassia)
Camellia
Campanulastrum
Campanulorchis
Canary Grass (Phalaris)
Candytuft (Iberis)
Canistrum
Canna
Cape Cowslip (Lachenalia)
Cape Fuchsia (Phygelius)
Cape Marigold (Dimorphotheca)
Caper (Capparis)
Caralluma
Carline Thistle (Carlina)
Carludovica
Carnegiea
Carpentaria
Carpet Juniper (Microbiota)
Carrierea
Carrion Flower (Stapelia)
Carrot (Daucus)
Carruanthus
Carum
Cast-Iron Plant (Aspidistra)
Catalpa
Catasetum
Catcylaelia
Catha
Catmint (Nepeta)
Catopsis
Cattail (Typha)
Cattleya
Cattleytonia
Cattlianthe
Caularthron
Cecropia
Cedar (Cedrus)
Celery (Apium)
Centradenia
Centratherum
Century Plant (Agave)
Cephalanthera
Cephalaria
Cephalocereus
Cerasus
Ceratostema
Ceratostylis
Ceratotheca
Ceratozamia
Cercidiphyllum
Cereus
Ceropegia
Chaenactis
Chaenorhinum
Chaerophyllum
Chaetopappa
Chaloupkaea
Chamaecrista
Chamaedorea
Chamaemelum
Chamaemespilus
Chambeyronia
Chasmatophyllum
Checker-Mallow (Sidalcea)
Cheiridopsis
Chelonopsis
Chenille Plant (Acalypha)
Chenopodium
Cherleria
Cherry (Prunus)
Chervil (Anthriscus)
Chiastophyllum
Chickweed (Paronychia)
Chicory (Cichorium)
Chiliotrichum
Chilli Pepper (Capsicum)
Chilopsis
Chin Cactus (Gymnocalycium)
China Aster (Callistephus)
Chionophila
Chionoscilla
Chirita
Chitalpa
Chloraea
Chloranthus
Chlorocyathus
Chlorogalum
Chocolate Vine (Akebia)
Choisya
Chokeberry (Aronia)
Christensonia
Christolea
Chrysactinia
Chrysanthemum
Chrysocoma
Chrysogonum
Chrysojasminum
Chrysophyllum
Chrysopogon
Chrysosplenium
Chrysothemis
Chysis
Cibotium
Cinchona
Cinnamomum
Cinquefoil (Potentilla)
Cinquefoil (Dasiphora)
Cischweinfia
Cistanthe
Citrofortunella
Citrullus
Cladrastis
Clarkia
Cleistocactus
Clematis
Cleomella
Clerodendrum
Cliff Brake (Pellaea)
Cliff Fern (Woodsia)
Climbing Gloxinia (Lophospermum)
Climbing Snapdragon (Maurandya)
Clinopodium
Clitoria
Clover (Trifolium)
Clover, Bush (Lespedeza)
Club-Moss (Huperzia)
Clusia
Coastal Milkweed (Sideroxylon)
Cochliasanthus
Cochlioda
Cochliostema
Cockscomb (Celosia)
Cocoa (Theobroma)
Codonanthe
Coelia
Coelogyne
Coffee (Coffea)
Coffeetree (Gymnocladus)
Cohosh (Actaea)
Coleogyne
Coleostephus
Coleus
Colewort (Crambe)
Collinsia
Collinsonia
Collomia
Colmanara
Colobanthus
Colophospermum
Columbine (Aquilegia)
Columnea
Coluria
Colutea
Coluteocarpus
Comandra
Comanthosphace
Combretum
Comet Orchid (Angraecum)
Comfrey (Symphytum)
Commiphora
Condalia
Coneflower (Rudbeckia)
Conioselinum
Conoclinium
Conophytum
Copernicia
Copiapoa
Copperleaf (Alternanthera)
Copperleaf (Acalypha)
Coral Bells (Heuchera)
Coral Plant (Russelia)
Coral-Bean (Erythrina)
Coralberry (Ardisia)
Coraltree (Erythrina)
Cordgrass (Spartina)
Coriander (Coriandrum)
Corispermum
Cork Tree (Phellodendron)
Cormus
Corn (Zea)
Corn-cockle (Agrostemma)
Cornel (Cornus)
Coronilla
Corpuscularia
Cortusa
Coryanthes
Corydalis
Corynabutilon
Corynephorus
Corynocarpus
Coryphantha
Corytoplectus
Cosmos
Cota
Cotoneaster
Cotton Grass (Eriophorum)
Cotton, Lavender (Santolina)
Cottonwood (Populus)
Cotula
Cotyledon
Cow Parsley (Anthriscus)
Cow-Lily (Nuphar)
Cow-Parsnip (Heracleum)
Cow-Tongue Cactus (Gasteria)
Crabgrass (Digitaria)
Cranesbill (Geranium)
Crape-Myrtle (Lagerstroemia)
Crassocephalum
Crassothonna
Crassula
Craterocapsa
Creeper, Virginia (Parthenocissus)
Cremnosedum
Crepis
Crocanthemum
Crocus
Crossosoma
Croton
Croton (Codiaeum)
Crown Cactus (Rebutia)
Crown Plant (Campsis)
Crown-Beard (Verbesina)
Cryosophila
Cryptogramma
Cryptostephanus
Cryptotaenia
Ctenanthe
Cucumber (Cucumis)
Cudweed (Pseudognaphalium)
Cuitlauzina
Culver's Root (Veronicastrum)
Cumulopuntia
Cunila
Cup Fern (Dennstaedtia)
Cuphea
Cupid's Dart (Catananche)
Curcuma
Currant (Ribes)
Cussonia
Cyanastrum
Cyanotis
Cycad (Zamia)
Cycad (Macrozamia)
Cycad (Encephalartos)
Cycad (Dioon)
Cyclamen
Cycloloma
Cymbidium
Cynanchum
Cyphostemma
Cypress (Taxodium)
Cypress (Hesperocyparis)
Cypress (Cupressus)
Cypress, Siberian (Microbiota)
Cypripedium
Cyrtochilum
Cyrtomium
Cyrtopodium
Cyrtorchis
Cyrtostachys
Cysticapnos
Cytisophyllum
D
Dactylicapnos
Dactylorhiza
Daffodil (Narcissus)
Dahlia
Daisy, Michaelmas (Aster)
Dalbergaria
Dalea
Damewort (Hesperis)
Dandelion (Taraxacum)
Danthonia
Daphne
Date Palm (Phoenix)
Datisca
Daubenya
Davidsonia
Dawn Redwood (Metasequoia)
Dayflower (Commelina)
Daylily (Hemerocallis)
Dead Nettle (Lamium)
Death Camas (Zigadenus)
Decaisnea
Degarmoara
Degenia
Deilanthe
Deinanthe
Delosperma
Delphinium
Dendranthema
Dendrobium
Dendrophylax
Desert Candle (Eremurus)
Desert Marigold (Baileya)
Desert Rose (Adenium)
Desert Sweet (Chamaebatiaria)
Desert-Parsley (Lomatium)
Desmanthus
Desmodium
Deuterocohnia
Deutzia
Devil's Claw (Proboscidea)
Devil's-Tongue (Amorphophallus)
Diacattleya
Dialaelia
Dialaeliocattleya
Dianthus
Diaphananthe
Diarrhena
Dichaea
Dichelostemma
Dichondra
Dichorisandra
Dicoma
Didymochlaena
Dieffenbachia
Diervilla
Dieteria
Digiplexis
Dill (Anethum)
Dimerandra
Dimorphocarpa
Dionysia
Dipcadi
Diplarche
Diplazium
Diplocaulobium
Diplotaxis
Dipteranthus
Dischidia
Discocactus
Disocactus
Disporopsis
Dog Fennel (Anthemis)
Dogbane (Apocynum)
Dogwood (Cornus)
Dolichandra
Domingoa
Dorotheanthus
Dorstenia
Doryanthes
Douglas-Fir (Pseudotsuga)
Dove Tree (Davidia)
Dracaena
Dracaena (Cordyline)
Dracula
Dracunculus
Dracuvallia
Dragon Flower (Huernia)
Dragon's Mouth (Horminum)
Dragonhead (Dracocephalum)
Drimia
Drimiopsis
Drimys
Drop-Tongue (Schismatoglottis)
Dropseed (Sporobolus)
Drosophyllum
Dryadella
Drymocallis
Drynaria
Duranta
Dutchman's Pipe (Aristolochia)
Duvalia
Dyckia
Dymondia
Dypsis
Dysosma
Dysphania
Dyssodia
E
Earth-Star (Cryptanthus)
Eberlanzia
Echeveria
Echinocactus
Echinocereus
Echinocystis
Echinospartum
Edmundoa
Ehretia
Elaeagnus
Elder (Sambucus)
Elephant's-Ear (Caladium)
Elephant's-Ear Plant (Colocasia)
Elephant's-Ear Plant (Alocasia)
Elettaria
Eleusine
Eleutherococcus
Eligmocarpus
Elionurus
Elk Grass (Xerophyllum)
Elkhorn Fern (Platycerium)
Elleanthus
Elm (Ulmus)
Elmera
Emilia
Empetrum
Empress Tree (Paulownia)
Enceliopsis
Encyclia
Engelmannia
Enkianthus
Ephedra
Epicattleya
Epidendrum
Epilaeliocattleya
Epilobium
Epipactis
Epiphronitis
Epipremnum
Episcia
Eremogone
Eremostachys
Erepsia
Eria
Ericameria
Erinacea
Eriocapitella
Eriocephalus
Eriocoma
Eriophyton
Eriospermum
Eriosyce
Eruca
Escobaria
Espostoa
Eucephalus
Eucharis
Eucrosia
Eulophia
Eumorphia
Euphorbia
Eupomatia
Euryale
Euryops
Euterpe
Eutrema
Evening-Primrose (Oenothera)
Everlasting (Helichrysum)
Everlasting (Antennaria)
Evolvulus
Exploding Cucumber (Ecballium)
F
Fabiana
Fagopyrum
Fairy Foxglove (Erinus)
Fairy Waterlily (Nymphoides)
Fairy-Bells (Disporum)
Fairy-Elephant's-feet (Frithia)
Fallopia
False Chamomile (Boltonia)
False Cypress (Chamaecyparis)
False Hellebore (Veratrum)
False Indigo (Baptisia)
False Nettle (Boehmeria)
False Spiraea (Sorbaria)
False Spiraea (Astilbe)
Fan Palm (Coccothrinax)
Fan Palm (Chamaerops)
Farinopsis
Fatshedera
Faucaria
Fawn-Lily (Erythronium)
Felicia
Felt Fern (Pyrrosia)
Fendlera
Fennel (Foeniculum)
Fern (Osmunda)
Fern (Elaphoglossum)
Fern (Athyrium)
Fern, Cup (Dennstaedtia)
Fernbush (Chamaebatiaria)
Ferraria
Ferulago
Fescue (Vulpia)
Fescue (Festuca)
Fessia
Feverwort (Triosteum)
Fibigia
Fig (Ficus)
Figwort (Scrophularia)
Filbert (Corylus)
Filipendula
Fir (Abies)
Fire Lily (Cyrtanthus)
Firethorn (Pyracantha)
Fishhook Cactus (Ferocactus)
Fishtail Palm (Caryota)
Fittonia
Flame Flower (Embothrium)
Flameflower (Talinum)
Flamingo Flower (Anthurium)
Flax (Linum)
Fleabane (Erigeron)
Fleeceflower (Polygonum)
Floss-Flower (Ageratum)
Flowering Maple (Abutilon)
Flowering Quince (Chaenomeles)
Flowering-Quartz (Gibbaeum)
Flueggea
Foamflower (Tiarella)
Fockea
Forestiera
Forget-Me-Not (Myosotis)
Fork Fern (Psilotum)
Forsythia
Fortnight Lily (Moraea)
Fosterella
Fothergilla
Fountain Grass (Pennisetum)
Fouquieria
Four-O'Clock (Mirabilis)
Foxglove (Digitalis)
Foxtail (Setaria)
Foxtail Grass (Alopecurus)
Foxtail Lily (Eremurus)
Frailea
Frangipani (Plumeria)
Frasera
Fredclarkeara
Freesia
Freycinetia
Fringe Tree (Chionanthus)
Fritillary (Fritillaria)
Frogfruit (Phyla)
Frost Flower (Aster)
Fuchsia
Fumana
Fumaria
Furcraea
G
Gagea
Galinsoga
Gamocarpha
Gardenia
Garrya
Gasteraloe
Gaultheria
Gaussia
Gay-Feather (Liatris)
Gazania
Geissorhiza
Gentian (Gentiana)
Gentian, Horse (Triosteum)
Gentianella
Gentianopsis
Geogenanthus
Geranium (Pelargonium)
Germander (Teucrium)
Gethyllis
Giant Fennel (Ferula)
Giant Hyssop (Agastache)
Giant Lily (Cardiocrinum)
Giant Sequoia (Sequoiadendron)
Gilia
Gilia (Aliciella)
Ginger (Zingiber)
Ginger Lily (Alpinia)
Ginger-Lily (Hedychium)
Gladiolus
Gland Bellflower (Adenophora)
Glandora
Glebionis
Gleditsia
Globe Daisy (Globularia)
Globe Flower (Trollius)
Globe Thistle (Echinops)
Globe-Mallow (Sphaeralcea)
Globe-Mallow (Iliamna)
Gloriosa Lily (Gloriosa)
Glory Bush (Tibouchina)
Glory Flower (Eccremocarpus)
Gloxinella
Gloxinia
Glumicalyx
Glyceria
Glycyrrhiza
Gnidia
Goat's Beard (Aruncus)
Goeppertia
Goldenrod (Solidago)
Gomesa
Gomphocarpus
Gomphostigma
Gomphrena
Gonatopus
Gongora
Goniolimon
Gorteria
Gossypium
Grama (Bouteloua)
Grammatophyllum
Grape (Vitis)
Grape Hyacinth (Muscari)
Grape Ivy (Cissus)
Graptopetalum
Grass, Canary (Phalaris)
Grass, Hair (Deschampsia)
Grassy-Bells (Edraianthus)
Gratiola
Grayia
Greater Celandine (Chelidonium)
Greek Valerian (Polemonium)
Green Ebony (Jacaranda)
Green Pepper (Capsicum)
Green-Eyes (Berlandiera)
Greenovia
Grielum
Gromwell (Lithospermum)
Gromwell (Buglossoides)
Ground-Cherry (Physalis)
Groundsel (Senecio)
Grusonia
Guarechea
Guarianthe
Guaricatophila
Guava (Psidium)
Gum (Eucalyptus)
Gum Plant (Grindelia)
Gum, Sweet (Liquidambar)
Gunnera
Gutta-Percha Tree (Eucommia)
Guzmania
Gypsophila
H
Haberlea
Hablitzia
Habranthus
Hackberry (Celtis)
Hackelia
Hacquetia
Hair Grass (Deschampsia)
Hairgrass (Koeleria)
Hakonechloa
Halimium
Hamelia
Handelia
Handkerchief Tree (Davidia)
Haplopappus
Harbouria
Hard Fern (Blechnum)
Hardy Gloxinia (Incarvillea)
Hare's Foot Fern (Davallia)
Harebell (Asyneuma)
Harpochloa
Harrisia
Hatiora
Hawkinsara
Hawkweed (Hieracium)
Haworthiopsis
Hawthorn (Crataegus)
Hazel (Corylus)
Hazelnut (Corylus)
Heartseed (Cardiospermum)
Heath (Erica)
Heavenly Bamboo (Nandina)
Hebenstretia
Hechtia
Hedeoma
Hedysarum
Hedyscepe
Helianthella
Heliomeris
Heliotrope (Heliotropium)
Helleborus
Hemiboea
Hemigraphis
Hemionitis
Hemlock (Tsuga)
Heptacodium
Hereroa
Hermannia
Hermbstaedtia
Herniaria
Heronsbill (Erodium)
Hesperaloe
Hesperantha
Hesperocallis
Hesperostipa
Heteromorpha
Heterospathe
Heterotheca
Heucherella
Hibiscus
Hickory (Carya)
Hildewintera
Hillia
Hippophae
Hippuris
Hoffmannia
Hoffmannseggia
Hohenbergia
Holly (Ilex)
Hollyhock (Althaea)
Hollyhock (Alcea)
Holodiscus
Honeysuckle (Lonicera)
Honeywort (Cerinthe)
Hoodia
Hop (Humulus)
Hophornbeam (Ostrya)
Horehound (Marrubium)
Horehound (Ballota)
Hormathophylla
Hornbeam (Carpinus)
Horned Poppy (Glaucium)
Horned Rampion (Phyteuma)
Hornungia
Horse Chestnut (Aesculus)
Horse Gentian (Triosteum)
Horse Radish (Armoracia)
Horsebrush (Tetradymia)
Horsemint (Monarda)
Horsetail (Equisetum)
Hound's Tongue (Cynoglossum)
Houttuynia
Howea
Huidobria
Hyacinth (Hyacinthus)
Hyacinthella
Hydnophytum
Hydrangea
Hydrocleys
Hylocereus
Hylomecon
Hylotelephium
Hymenolepis
Hymenopappus
Hymenosporum
Hymenothrix
Hymenoxys
Hyoscyamus
Hypoestes
Hyssop (Hyssopus)
I
Ianclarkara
Impatiens
Inch Plant (Callisia)
Indian Paintbrush (Castilleja)
Indian Parsley (Aletes)
Indian Physic (Gillenia)
Indigo (Indigofera)
Indigo (Amorpha)
Indonesian Ginger (Tapeinochilos)
Inula
Ipheion
Ipomopsis
Iris
Ironweed (Vernonia)
Isabelia
Isochilus
Isocoma
Isopyrum
Ivy (Hedera)
Ivy (Cissus)
Ivy, Grape (Cissus)
Ixia
Ixiolirion
J
Jaborosa
Jacaratia
Jack-in-the-Pulpit (Arisaema)
Jacob's-Ladder (Polemonium)
Jacobaea
Jacquiniella
Jade Plant (Portulacaria)
Jade Vine (Strongylodon)
Jamesbrittenia
Jamesia
Jancaea
Japanese Blood Grass (Imperata)
Japanese Hydrangea (Schizophragma)
Japanese Quince (Chaenomeles)
Japanese Rose (Kerria)
Japanese Yew (Taxus)
Jarava
Jasmine (Jasminum)
Jatropha
Javan Grape (Tetrastigma)
Jewel-Flower (Streptanthus)
Joepyeweed (Eutrochium)
Joseph's Coat (Alternanthera)
Jovibarba
Joyweed (Alternanthera)
Juanulloa
Jumellea
Juneberry (Amelanchier)
Junellia
Jungle Flame (Ixora)
Juniper (Juniperus)
Juniper, Carpet (Microbiota)
Jurinea
K
Kaffir Lily (Clivia)
Kalanchoe
Kale (Brassica)
Kalimeris
Kallstroemia
Kalmia
Kalopanax
Kapok (Ceiba)
Karpatiosorbus
Karwinskia
Kefersteinia
Kelseya
Kentucky Coffee-tree (Gymnocladus)
Kerriodoxa
Khadia
Kidneyvetch (Anthyllis)
King's Spear (Asphodeline)
Kinnikinnick (Arctostaphylos)
Kitagawia
Kitaibela
Kitten-tails (Besseya)
Kiwi-Fruit (Actinidia)
Klasea
Kleinia
Knapweed (Plectocephalus)
Knapweed (Centaurea)
Knautia
Knotweed (Polygonum)
Knotweed (Persicaria)
Koelreuteria
Koenigia
Kohleria
Kolkwitzia
Krascheninnikovia
Kudrjaschevia
L
Lablab
Laburnum
Lady Fern (Athyrium)
Lady's Mantle (Alchemilla)
Ladybells (Adenophora)
Laelia
Laeliocatanthe
Laeliocattleya
Laelirhynchos
Lagenaria
Lagochilus
Lagurus
Lallemantia
Lampranthus
Lamprocapnos
Lantana
Lapeirousia
Lapidaria
Larch (Larix)
Laretia
Larkspur (Consolida)
Larrea
Laserpitium
Lasia
Lasiandra (Tibouchina)
Lasthenia
Lavatera
Lavender (Lavandula)
Lavender Cotton (Santolina)
Layia
Lead Plant (Amorpha)
Leadwort (Plumbago)
Leaf Cactus (Pereskia)
Lecanopteris
Ledebouria
Leea
Legousia
Leibnitzia
Lemaireocereus
Lemon (Citrus)
Lemon Verbena (Aloysia)
Lemongrass (Cymbopogon)
Leobordea
Leontice
Leontopodium
Leonurus
Leopard Orchid (Ansellia)
Leopard's-Bane (Doronicum)
Leopoldia
Lepismium
Lepisorus
Leptinella
Leptodermis
Leptoglossis
Leptopus
Leptosiphon
Leptotes
Lessertia
Lettuce (Lactuca)
Leucanthemum
Leuchtenbergia
Leucocoryne
Leucophyta
Lewisiopsis
Libertia
Licuala
Ligularia
Lilac (Syringa)
Lillypilly (Syzygium)
Lily (Lilium)
Lily-of-China (Rohdea)
Lily-of-the-Field (Pulsatilla)
Lily-of-the-Valley (Convallaria)
Lilyturf (Ophiopogon)
Lilyturf (Liriope)
Limnobium
Linanthus
Lindelofia
Linden (Tilia)
Lindera
Lindernia
Lion's Ear (Leonotis)
Lion's Tail (Leonotis)
Lip Fern (Cheilanthes)
Liparis
Lippia
Lipstick Plant (Aeschynanthus)
Lipstick Tree (Bixa)
Lithodora
Liveforever (Dudleya)
Liverleaf (Hepatica)
Living Rock Cactus (Ariocarpus)
Living Stone (Aloinopsis)
Living-Rock (Pleiospilos)
Living-Stones (Lithops)
Livingvase (Aechmea)
Livistona
Lloydia
Loasa
Lobelia
Lobivia
Lobster Claw (Heliconia)
Lobularia
Lockhartia
Locoweed (Oxytropis)
Locust (Robinia)
Loeseneriella
Lolium
Lomatia
Lomelosia
Lonchocarpus
Loosestrife (Lysimachia)
Lotononis
Lotus (Nelumbo)
Lotus
Lousewort (Pedicularis)
Lovage (Ligusticum)
Lovage (Levisticum)
Lovegrass (Eragrostis)
Lowara
Ludwigia
Luffa
Lungwort (Pulmonaria)
Lungwort (Mertensia)
Lupine (Lupinus)
Lycaste
Lychnis
Lycopus
Lycurus
Lygodesmia
Lygodium
Lymania
Lyonara
Lysionotus
Lysudamuloa
M
Maackia
Macadamia Nut (Macadamia)
Macleania
Maclura
Macodes
Madder (Rubia)
Madia
Madwort (Alyssum)
Magnolia
Maidenhair Fern (Adiantum)
Maidenhair Tree (Ginkgo)
Maihuenia
Maihueniopsis
Malacothamnus
Malanga (Xanthosoma)
Malephora
Mallow (Malva)
Malope
Malpighia
Mandevilla
Mandrake (Mandragora)
Manfreda
Mangave
Mango (Mangifera)
Mangrove (Rhizophora)
Manihot
Manilkara
Manzanita (Arctostaphylos)
Manzanita (Arbutus)
Maple (Acer)
Marcgravia
Marigold (Tagetes)
Marigold (Calendula)
Mariposa Lily (Calochortus)
Marjoram (Origanum)
Marsh Marigold (Caltha)
Marshallia
Marshmallow (Althaea)
Masdevallia
Mask Flower (Alonsoa)
Massonia
Masterwort (Astrantia)
Matchweed (Gutierrezia)
Matelea
Matricaria
Matucana
Mauranthemum
Maxillaria
May-Lily (Maianthemum)
Mayapple (Podophyllum)
Maytenus
Mcneillia
Meadow-Rue (Thalictrum)
Medinilla
Mediocalcar
Medlar (Mespilus)
Megaskepasma
Meiracyllium
Melampodium
Melastoma
Melianthus
Melic Grass (Melica)
Melinis
Melittis
Melocactus
Melon (Cucumis)
Melon Tree (Carica)
Menodora
Menyanthes
Merry-Bells (Uvularia)
Mescal-Button Cactus (Lophophora)
Mesembryanthemum
Meum
Mexican Hyssop (Agastache)
Mexican Sunflower (Tithonia)
Mexipedium
Mezobromelia
Michaelmas Daisy (Aster)
Michauxia
Micranthes
Microgramma
Micromeria
Microsorum
Microsteris
Microterangis
Mignonette (Reseda)
Mila
Milium
Milk Thistle (Silybum)
Milkvetch (Astragalus)
Milkweed (Asclepias)
Milkwort (Polygala)
Miltassia
Miltonia
Miltonidium
Miltoniopsis
Mimosa
Mimosa (Acacia)
Mint (Mentha)
Minuartia
Miscanthus
Mitella
Mitriostigma
Mock Azalea (Adenium)
Mock Orange (Philadelphus)
Moltkia
Moluccella
Momordica
Monadenium
Monardella
Mondo Grass (Ophiopogon)
Monk's Hood (Gymnaconitum)
Monk's Hood (Aconitum)
Monkey Flower (Erythranthe)
Monkey-Bread Tree (Adansonia)
Monkey-Flower (Mimulus)
Monkey-Puzzle Tree (Araucaria)
Monkshoodvine (Ampelopsis)
Monolena
Monstera
Montbretia (Crocosmia)
Montiopsis
Moon Cactus (Selenicereus)
Moor Grass (Molinia)
Morella
Morning-Glory (Ipomoea)
Moth Catcher (Araujia)
Mount Atlas Daisy (Anacyclus)
Mountain Ash (Sorbus)
Mountain Avens (Dryas)
Mountain Dandelion (Agoseris)
Mountain Mint (Pycnanthemum)
Mountain Mohogany (Cercocarpus)
Mountain Poppy (Oreomecon)
Mountain-Lily (Leucocrinum)
Mouse-Ear Chickweed (Cerastium)
Muehlenbeckia
Mugwort (Artemisia)
Muhly (Muhlenbergia)
Mukdenia
Mulberry (Morus)
Mulguraea
Mulinum
Mullein (Verbascum)
Murraya
Musella
Musineon
Musk Mallow (Abelmoschus)
Mussaenda
Mutisia
Myrmecocattleya
Myrmecodia
Myrmecophila
Myrrh (Myrrhis)
Myrtle Cactus (Myrtillocactus)
N
Nageliella
Nailwort (Paronychia)
Naked Lady (Amaryllis)
Nananthus
Napaea
Nardophyllum
Nassauvia
Nastanthus
Nasturtium (Tropaeolum)
Nautilocalyx
Navelwort (Omphalodes)
Navelwort (Hydrocotyle)
Necklaceweed (Actaea)
Needlegrass (Stipa)
Needlegrass (Nassella)
Needlegrass (Achnatherum)
Neltuma
Nematanthus
Nemesia
Nemophila
Neobenthamia
Neobuxbaumia
Neocaste
Neocheiropteris
Neoglaziovia
Neohenricia
Neomarica
Neomea
Neophytum
Neoregelia
Neostylis
Neotanthus
Neotrinia
Nephthytis
Nerine
Nestotus
Nettle (Urtica)
New Zealand Bur (Acaena)
Nidema
Nidularium
Nierembergia
Nigella
Night-Blooming Cereus (Selenicereus)
Nightshade (Solanum)
Ninebark (Physocarpus)
Nitidobulbon
Nolana
Nolina
Norantea
Nothocalais
Nothochelone
Notholirion
Nothoscordum
Notocactus
Notopappus
Nototriche
O
Oak (Quercus)
Oak Fern (Gymnocarpium)
Oat Grass (Helictotrichon)
Oat Grass (Arrhenatherum)
Obedient Plant (Physostegia)
Obregonia
Ochna
Odontarrhena
Odontocidium
Odontoglossum
Odontonia
Oeceoclades
Oeoniella
Oerstedella
Olive (Olea)
Olsynium
Oncidesa
Oncidioda
Oncidium
Onion (Allium)
Onobrychis
Onoclea
Ononis
Onopordum
Onosma
Onosmodium
Operculicarya
Ophioglossum
Orach (Atriplex)
Orange (Citrus)
Orange, Mock (Philadelphus)
Orbea
Orbexilum
Orchid Cactus (Epiphyllum)
Oregano (Origanum)
Oreocereus
Oreomyrrhis
Oreopolus
Oreopteris
Oreostemma
Oreoxis
Orixa
Orlaya
Ornithophora
Orontium
Orostachys
Oroya
Orthocarpus
Orthophytum
Oscularia
Osier (Salix)
Osmanthus
Osmoglossum
Osmoxylon
Osmundastrum
Osteospermum
Ostrich Fern (Matteuccia)
Ostrowskia
Othonna
Ourisia
Ovidia
Oxeye (Heliopsis)
Oxypetalum
Oxyria
P
Pabstiella
Pachycereus
Pachycormus
Pachyphytum
Pachypodium
Pachystachys
Pachyveria
Pacific Hound's Tongue (Adelinia)
Packera
Palafoxia
Pale Madwort (Alyssoides)
Paliavana
Palisota
Palmetto (Sabal)
Pampas Grass (Cortaderia)
Panic Grass (Panicum)
Panic Grass (Dichanthelium)
Papaya (Carica)
Paphinia
Paphiopedilum
Papyrus (Cyperus)
Paracaryum
Paraphalaenopsis
Paraquilegia
Pardanthopsis
Paris
Parnassus Grass (Parnassia)
Parodia
Parrya
Parsley (Petroselinum)
Parthenium
Passerina
Passionflower (Passiflora)
Pastinaca
Patchouli (Pogostemon)
Patrinia
Pavonia
Pawpaw (Carica)
Pawpaw (Asimina)
Paxistima
Pea (Pisum)
Pea Shrub (Caragana)
Pear (Pyrus)
Pearl Bush (Exochorda)
Pearly Everlasting (Anaphalis)
Peavine (Lathyrus)
Pecan (Carya)
Pediocactus
Pediomelum
Pelecyphora
Pellionia
Peltandra
Peniocereus
Pennycress (Thlaspi)
Pennycress (Noccaea)
Pentameris
Pentanema
Pentapetes
Pentas
Pentzia
Peony (Paeonia)
Pepper (Piper)
Pepper (Peperomia)
Pepper (Capsicum)
Peppergrass (Lepidium)
Peppervine (Ampelopsis)
Peraphyllum
Perezia
Pericome
Perilla
Peristeria
Periwinkle (Vinca)
Periwinkle (Catharanthus)
Persian Witch Hazel (Parrotia)
Persimmon (Diospyros)
Peruvian Lily (Alstroemeria)
Petchoa
Petopentia
Petrocosmea
Petrophytum
Petrorhagia
Petrosedum
Petunia
Petunia (Calibrachoa)
Peucedanum
Peyote (Lophophora)
Pfeiffera
Phaedranassa
Phaiocalanthe
Phalaenopsis
Pheasant's Eye (Adonis)
Phemeranthus
Phillipine Violet (Barleria)
Philodendron
Phlomis
Phlomoides
Phlox
Pholidota
Photinia
Phragmipaphium
Phragmipedium
Phuopsis
Phycella
Phyllanthopsis
Phyllanthus
Phyllodoce
Physaria
Physochlaina
Physoplexis
Pickerelweed (Pontederia)
Picradeniopsis
Pieris
Pierrebraunia
Pignut Palm (Hyophorbe)
Pigweed (Amaranthus)
Pilea
Pilosella
Pilosocereus
Pimpernel (Anagallis)
Pimpinella
Pinalia
Pincushion Cactus (Mammillaria)
Pincushion Flower (Scabiosa)
Pine (Pinus)
Pineapple (Ananas)
Pineapple Lily (Eucomis)
Pinellia
Piptatherum
Piptochaetium
Pistacio (Pistacia)
Pistia
Pitcairnia
Pitcherplant (Sarracenia)
Pitcherplant (Nepenthes)
Pitchforks (Bidens)
Pittocaulon
Plagiorhegma
Plantain (Plantago)
Plantain Lily (Hosta)
Platycarya
Platycladus
Platystele
Plectostachys
Plectranthus
Plectrelminthus
Pleioblastus
Pleiostachya
Pleopeltis
Pleuraphis
Pleuropetalum
Pleurophora
Pleurospermum
Pleurothallis
Plinia
Plum (Prunus)
Plum Yew (Cephalotaxus)
Plumbago (Ceratostigma)
Poaceae
Podocarp (Podocarpus)
Pogonarthria
Point Vetch (Oxytropis)
Pokeberry (Phytolacca)
Pokeweed (Phytolacca)
Polanisia
Polianthes
Poliomintha
Polypodium
Polyscias
Polystachya
Pomaria
Ponera
Pontechium
Poppy (Papaver)
Poppy Mallow (Callirhoe)
Poppywort (Meconopsis)
Porcelain Berry (Ampelopsis)
Porcelain Flower (Hoya)
Portea
Portia Tree (Thespesia)
Posoqueria
Potinara
Pouch Flower (Calceolaria)
Powder Puff Trees (Calliandra)
Pozoa
Prairie Coneflower (Ratibida)
Prairie Gentian (Eustoma)
Prangos
Prayer Plant (Maranta)
Prickly Poppy (Argemone)
Prickly Thrift (Acantholimon)
Prickly-Pear (Opuntia)
Prickly-Pear (Cylindropuntia)
Prickly-Pear (Corynopuntia)
Primrose (Primula)
Prince's-Plume (Stanleya)
Princess Tree (Paulownia)
Prinsepia
Pritchardia
Pritzelago
Privet (Ligustrum)
Procatavola
Promenaea
Prometheum
Prosthechea
Protea
Psammotropha
Psephellus
Pseuderanthemum
Pseudobombax
Pseudocydonia
Pseudofumaria
Pseudogynoxys
Pseudohandelia
Pseudolaelia
Pseudolysimachion
Pseudomuscari
Pseudomussaenda
Pseudorhipsalis
Pseudoroegneria
Pseudosedum
Pseudoselago
Psilostrophe
Psoralidium
Psorothamnus
Psychopsis
Ptelea
Pterocactus
Pterocephalus
Ptilagrostis
Ptilostemon
Ptilotrichum
Ptilotus
Pumpkin (Cucurbita)
Purple Coneflower (Echinacea)
Purshia
Purslane (Portulaca)
Pussy's Foot (Ageratum)
Pussytoes (Antennaria)
Putoria
Puya
Pygmaeocereus
Pyrenean Deadnettle (Horminum)
Pyrrocoma
Q
Quaking-Grass (Briza)
Quamash (Camassia)
Queen's Wreath (Petrea)
Quesmea
Quesnelia
Quetzalcoatlia
Quiabentia
Quince (Cydonia)
Quincula
R
Rabbit's Foot Fern (Phlebodium)
Rabbitbrush (Chrysothamnus)
Rabiea
Racinaea
Radish (Raphanus)
Ramonda
Raoulia
Raspberry (Rubus)
Ravenea
Red Hot Poker (Kniphofia)
Red Puccoon (Sanguinaria)
Redbud (Cercis)
Reed (Phragmites)
Reed (Arundinaria)
Reed Grass (Calamagrostis)
Rehmannia
Remusatia
Resnova
Restrepia
Restrepiella
Resurrection Lily (Kaempferia)
Rhaphidophora
Rhaphithamnus
Rhapidophyllum
Rhapis
Rhaponticum
Rhodanthe
Rhodanthemum
Rhodiola
Rhodocoma
Rhododendron
Rhodophiala
Rhodothamnus
Rhodotypos
Rhombophyllum
Rhubarb (Rheum)
Rhyncattleanthe
Rhynchobrassoleya
Rhyncholaelia
Rhyncholaeliocattleya
Rhynchostele
Rhytidophyllum
Richteria
Ricinus
Rivina
Rock Jasmine (Androsace)
Rock Purslane (Calandrinia)
Rock-Rose (Helianthemum)
Rock-Rose (Cistus)
Rockcress (Boechera)
Rockcress (Arabis)
Rocket (Hesperis)
Rodgersia
Rodriguezia
Roessleria
Rogeria
Romulea
Rondeletia
Ronnbergia
Roscoea
Rose (Rosa)
Rose Grass (Rhodohypoxis)
Rosinweed (Silphium)
Rosinweed (Grindelia)
Rossioglossum
Rosularia
Rotheca
Royal Waterlily (Victoria)
Rubber Vine (Cryptostegia)
Rue (Ruta)
Ruellia
Ruffle Palm (Aiphanes)
Ruschia
Rush (Juncus)
Ruspolia
Ruttya
S
Sabulina
Safflower (Carthamus)
Safflower (Carduncellus)
Sage (Salvia)
Sagina
Sago Palm (Cycas)
Salt Tree (Halimodendron)
Salt-bush (Atriplex)
Sanchezia
Sand Verbena (Abronia)
Sandwort (Arenaria)
Saraca
Sarcobatus
Sarcochilus
Sarcoglottis
Sarcopoterium
Saruma
Sassafras
Satureja
Satureja (Acinos)
Saururus
Saw-Wort (Saussurea)
Saxifrage (Saxifraga)
Scabious (Scabiosa)
Scabrethia
Scadoxus
Scaphosepalum
Scaphyglottis
Schaueria
Schedonnardus
Schisandra
Schistostephium
Schivereckia
Schizanthus
Schlumbergera
Schoenorchis
Schoenus
Schombocattleya
Schomburgkia
Schotia
Schrenkia
Scindapsus
Scirpus
Scleranthus
Sclerocactus
Scopolia
Scorpion Weed (Phacelia)
Scorzonera
Screw Pine (Pandanus)
Scullcap (Scutellaria)
Sea Grape (Coccoloba)
Sea Heath (Frankenia)
Sea Holly (Eryngium)
Sea Kale (Crambe)
Sea Lavender (Limonium)
Sea Oats (Chasmanthium)
Sea Pink (Armeria)
Sea Poppy (Glaucium)
Sea-Urchin Cactus (Echinopsis)
Searsia
Sedge (Isolepis)
Sedge (Carex)
Seemannia
Selago
Self-Heal (Prunella)
Selinum
Sempervivum
Senna
Sequoia
Sergia
Service Tree (Sorbus)
Serviceberry (Amelanchier)
Sesamothamnus
Seseli
Sesleria
Shad (Amelanchier)
Shadblow (Amelanchier)
Shadbush (Amelanchier)
Sheep's-Bit (Jasione)
Shield Fern (Polystichum)
Shooting Star (Dodecatheon)
Shrubby Bittersweet (Celastrus)
Sibbaldia
Siberian Bugloss (Brunnera)
Siberian Cypress (Microbiota)
Sibiraea
Sida
Siderasis
Sideritis
Sievekingia
Silene
Silk Plant (Albizia)
Silk-Cotton Tree (Ceiba)
Silver Palm (Coccothrinax)
Sinningia
Sinocrassula
Siphonochilus
Sisyrinchium
Sium
Slipper Flower (Calceolaria)
Slipperwort (Calceolaria)
Smelowskia
Smoketree (Cotinus)
Snake Plant (Sansevieria)
Snakeroot (Ageratina)
Snakeroot, Button (Liatris)
Snapdragon (Antirrhinum)
Sneezeweed (Helenium)
Snow-Wreath (Neviusia)
Snowbell (Styrax)
Snowberry (Symphoricarpos)
Snowdrop (Galanthus)
Snowflake (Leucojum)
Soapberry (Sapindus)
Soapwort (Saponaria)
Sobralia
Solandra
Solidaster
Solomon's Seal (Polygonatum)
Sophora
Sophrocattleya
Sophrolaelia
Sophrolaeliocattleya
Sophronitis
Sorbaronia
Sorghastrum
Sorrel (Rumex)
Sorrel Tree (Oxydendrum)
Sotol (Dasylirion)
Souroubea
Sourwood (Oxydendrum)
Spanish Needles (Bidens)
Sparaxis
Sparmannia
Spathiphyllum
Spathoglottis
Specklinia
Speedwell (Veronica)
Speirantha
Spergularia
Sphaeromeria
Sphagneticola
Spicebush (Calycanthus)
Spider Plant (Cleome)
Spider Plant (Anthericum)
Spider-Lily (Lycoris)
Spider-Lily (Hymenocallis)
Spider-lily (Crinum)
Spiderwort (Tradescantia)
Spigelia
Spike Grass (Chasmanthium)
Spike-Moss (Selaginella)
Spike-Rush (Eleocharis)
Spilanthes
Spinacia
Spindle Tree (Euonymus)
Spiraea
Spiraea (Astilbe)
Spiral Ginger (Costus)
Spleenwort (Asplenium)
Sprekelia
Spring Beauty (Claytonia)
Spring-Club Palm (Bactris)
Spring-Parsley (Cymopterus)
Spruce (Picea)
Spurge (Pachysandra)
Squash (Cucurbita)
Squill (Scilla)
Squirting Cucumber (Ecballium)
St. Bernard's Lily (Chlorophytum)
St. John'swort (Hypericum)
Stachyurus
Stanfieldara
Stanhopea
Stapelianthus
Star Cactus (Haworthia)
Star Fruit (Averrhoa)
Star Grass (Hypoxis)
Star Thistle (Centaurea)
Star-of-Bethlahem (Ornithogalum)
Starwort (Aster)
Statice (Limonium)
Stelis
Stellera
Stenaria
Stenocereus
Stenorrhynchos
Stenotaphrum
Stenotus
Stephanandra
Sternbergia
Stetsonia
Stevia
Stewartia
Stock (Matthiola)
Stokes' Aster (Stokesia)
Stomatium
Stone Cress (Aethionema)
Stonecrop (Sedum)
Stonecrop (Phedimus)
Stopper (Eugenia)
Strawberry (Fragaria)
Strawberry Cactus (Mammillaria)
Strawberry, Barren (Waldsteinia)
Strawflower (Helichrysum)
Strelitzia
Streptocarpus
Striped Squill (Puschkinia)
Strobilanthes
Stromanthe
Strombocactus
Stylophorum
Styphnolobium
Succisa
Sudamerlycaste
Sugarcane (Saccharum)
Sugarplum (Amelanchier)
Sumac (Rhus)
Summer-Sweet (Clethra)
Sun Pitcher (Heliamphora)
Sundew (Drosera)
Sunflower (Helianthus)
Sunrose (Helianthemum)
Swallowwort (Chelidonium)
Sweet Cicely (Osmorhiza)
Sweet Coltsfoot (Petasites)
Sweet Gum (Liquidambar)
Sweetcicely (Myrrhis)
Sweetflag (Acorus)
Sweetspire (Itea)
Swertia
Sword Fern (Nephrolepis)
Sycamore (Platanus)
Synandrospadix
Syneilesis
Syngonium
Synthyris
Syringa (Philadelphus)
Syringodea
T
Tabernaemontana
Tacitus
Taenidia
Tail Grape (Artabotrys)
Tailflower (Anthurium)
Talbotia
Tansy (Tanacetum)
Tansy (Pyrethrum)
Tansy-Aster (Machaeranthera)
Tecophilaea
Telekia
Telesonix
Telipogon
Tellima
Temple Tree (Plumeria)
Tenaxia
Tephrocactus
Tephrosia
Tetradium
Tetraglochin
Tetraneuris
Thamnocalamus
Thaumatophyllum
Thelesperma
Thelocactus
Themeda
Thermopsis
Thistle (Cirsium)
Thistle, Globe (Echinops)
Thoroughwort (Eupatorium)
Thorow Wax (Bupleurum)
Three-Awn Grass (Aristida)
Thrift (Armeria)
Throatwort (Trachelium)
Thunbergia
Thunia
Thyme (Thymus)
Tickseed (Coreopsis)
Tickseed (Bidens)
Tigridia
Tillandsia
Timothy (Phleum)
Tinantia
Titanopsis
Toad Lily (Tricyrtis)
Toadflax (Linaria)
Tobacco (Nicotiana)
Tonestus
Tongueleaf (Glottiphyllum)
Toona
Torch Ginger (Etlingera)
Torchwood (Bursera)
Torenia
Torminalis
Torreya
Townsendia
Trachelospermum
Trachyandra
Trachystemon
Tragopogon
Treacle Mustard (Erysimum)
Tree Fern (Dicksonia)
Treebine (Cissus)
Trichocentrum
Trichocereus
Trichoceros
Trichodiadema
Trichoglottis
Trichopilia
Trichosalpinx
Trichostigma
Tridens
Tripterocalyx
Trisetella
Triteleia
Tromotriche
Troncosoa
Trumpet Bush (Tecoma)
Trumpet Creeper (Campsis)
Trumpet Flower (Campsis)
Trumpet Tree (Tabebuia)
Trumpet Vine (Campsis)
Tubeflower (Iochroma)
Tulbaghia
Tulip (Tulipa)
Tulip Orchid (Anguloa)
Tulip Tree (Liriodendron)
Tulista
Tunilla
Tupelo (Nyssa)
Turbinicarpus
Turnera
Turpentine Weed (Gutierrezia)
Turtlehead (Chelone)
Twining Snapdragon (Asarina)
Twinleaf (Jeffersonia)
Twinspur (Diascia)
Tylecodon
Typhonium
Typhonodorum
U
Uebelmannia
Umbilicus
Umbrella Sedge (Cyperus)
Umbrella Tree (Schefflera)
Ungnadia
Unicorn Plant (Proboscidea)
Ursinia
Ursulaea
V
Vaccinium
Valerian (Valeriana)
Valerian, Greek (Polemonium)
Vallisneria
Vancouveria
Vanda
Vania
Vanilla
Vase Plant (Billbergia)
Vase Plant (Aechmea)
Vaughnara
Vauquelinia
Veitchia
Veldt Lily (Veltheimia)
Vella
Velvetleaf (Abutilon)
Venus Flytrap (Dionaea)
Verbena
Verbena (Glandularia)
Veronica (Hebe)
Vervain (Verbena)
Vervain (Glandularia)
Vesper
Vetch (Vicia)
Vickifunkia
Vigna
Villadia
Vincetoxicum
Violet (Viola)
Viper's Bugloss (Echium)
Virginia Creeper (Parthenocissus)
Vitex
Volkameria
Vriecantarea
Vriesea
Vuylstekeara
W
Wahlenbergia
Wake-robin (Trillium)
Wallflower (Erysimum)
Wallisia
Walnut (Juglans)
Wandflower (Dierama)
Warczewiczella
Warszewiczia
Wart Plant (Haworthia)
Washington Palm (Washingtonia)
Water Canna (Thalia)
Water Clover (Marsilea)
Water Hyssop (Bacopa)
Water Lily (Nymphaea)
Water Pennywort (Hydrocotyle)
Water Snowflake (Nymphoides)
Water Willow (Justicia)
Waterleaf (Hydrophyllum)
Watsonia
Wattle (Acacia)
Wax Myrtle (Myrica)
Wax Vine (Hoya)
Wedding Flower (Dombeya)
Weevil Lily (Molineria)
Weigela
Welwitschia
Werauhia
Werneria
Wheat (Triticum)
Wheatgrass (Pascopyrum)
Wheatgrass (Elymus)
Wheatgrass (Agropyron)
Whisk Fern (Psilotum)
White Alder (Clethra)
White Forget-Me-Not (Cryptantha)
Whiteweed (Ageratum)
Whitfieldia
Whitlow Grass (Draba)
Whitlowwort (Paronychia)
Whorlflower (Morina)
Wickerware Cactus (Rhipsalis)
Wild Buckwheat (Eriogonum)
Wild Coffee (Psychotria)
Wild Dagga (Leonotis)
Wild Ginger (Asarum)
Wild Indigo (Baptisia)
Wild Irishman (Discaria)
Wild Parsnip (Angelica)
Wildrye (Leymus)
Willow (Salix)
Wilsonara
Windflower (Pulsatilla)
Windflower (Anemone)
Window Plant (Fenestraria)
Wing Nut (Pterocarya)
Winged Everlasting (Ammobium)
Winter Aconite (Eranthis)
Winter Hazel (Corylopsis)
Winterocereus
Wisteria
Witch Hazel (Hamamelis)
Withania
Wittrockia
Wodyetia
Wollemi Pine (Wollemia)
Wood Fern (Dryopteris)
Wood Sorrel (Oxalis)
Woodbine (Parthenocissus)
Woodruff (Asperula)
Woodrush (Luzula)
Woodwardia
Woolly Sunflower (Eriophyllum)
Wormwood (Artemisia)
Woundwort (Stachys)
Wulfenia
Wurmbea
Wyethia
X
Xanthisma
Xanthoparmelia
Xeranthemum
Xerochrysum
Xerophyta
Xerosicyos
Xylanthemum
Xylobium
Y
Yam (Dioscorea)
Yamadara
Yampah (Perideridia)
Yarrow (Achillea)
Yautia (Xanthosoma)
Yellow Alyssum (Alyssoides)
Yellow Horn (Xanthoceras)
Yellow Waxbells (Kirengeshoma)
Yellowbells (Tecoma)
Yellowwood (Afrocarpus)
Yerba Mansa (Anemopsis)
Yew (Taxus)
Yew, Japanese (Taxus)
Yew, Plum (Cephalotaxus)
Yucca
Yucca (Hesperoyucca)
Z
Zabelia
Zaluzianskya
Zamioculcas
Zanthoxylum
Zelkova
Zepher Lily (Zephyranthes)
Zinnia
Zizia
Ziziphora
Ziziphus
Zoellnerallium
Zombi Palm (Zombia)
Zootrophion
Zygolum
Zygopetalum
Zygophyllum