NAME	FAMILY	NATIVITY
Quercus agrifolia	Fagaceae	California
Quercus albocineta	Fagaceae	Mexico
Quercus lobata	Fagaceae	California
Quercus virginiana	Fagaceae	Virginia to Florida and Mexico
Quesnelia arvensis	Bromeliaceae	S Brazil
Quesnelia marmorata	Bromeliaceae	S Brazil
Quesnelia testudo	Bromeliaceae	E Brazil
Ranunculus sp.	Ranunculaceae
Rauhia peruviana	Liliaceae	Peru
Rauvolfia caffra	Apocynaceae	South Africa
Rauvolfia samarensis	Apocynaceae	Philippines
Ravenea madagascariensis	Arecaceae	Madagascar
Ravenea monticola	Arecaceae	Madagascar
Ravenea rivularis	Arecaceae	Madagascar
Rebutia arenacea	Cactaceae	Bolivia(Cochabamba)
Rebutia peruviana	Cactaceae
Reineckea carnea	Convallariaceae	China, Japan
Rhagodia spinescens v. deltophylla	Chenopodiaceae	S Australia
Rhamnus alaternus	Rhamanceae	Portugal
Rhamnus californicus var. tomentella	Rhamnaceae	California
Rhamnus californicus	Rhamnaceae	W United States
Rhaphidophora decursiva	Araceae	SE Asia
Rhapidophyllum hystrix	Arecaceae	SE United States
Rhapis excelsa	Arecaceae	S China
Rhapis humilis	Arecaceae	China
Rhipsalis cereuscula	Cactaceae	Cen Brazil to Uruguay
Rhipsalis cf. elliptica	Cactaceae	Brazil
Rhipsalis clavata	Cactaceae	SE Brazil
Rhipsalis crispa	Cactaceae	SE Brazil
Rhipsalis grandiflora	Cactaceae	Brazil
Rhipsalis mesembryanthemoides	Cactaceae	Brazil(Rio de Janeiro)
Rhipsalis micrantha	Cactaceae	Brazil
Rhipsalis micrantha x naranja	Cactaceae
Rhipsalis monacantha v. espinosa	Cactaceae	N Argentina
Rhipsalis pachyptera	Cactaceae	Brazil
Rhipsalis paradoxa	Cactaceae	SE Brazil
Rhipsalis pentaptera	Cactaceae	S Brazil
Rhipsalis pilocarpa	Cactaceae	SE Brazil
Rhipsalis platycarpa	Cactaceae	Brazil
Rhipsalis rhombea	Cactaceae	Brazil
Rhipsalis sulcata	Cactaceae	Brazil
Rhipsalis teres	Cactaceae	S Brazl
Rhododendron cv. Alaska	Ericaceae
Rhododendron cv. Brilliant	Ericaceae
Rhododendron cv. Christmas Cheer	Ericaceae
Rhododendron cv. Duc de Rohan	Ericaceae
Rhododendron cv. Formosa	Ericaceae
Rhododendron cv. George Lindley Tabor	Ericaceae
Rhododendron cv. L. J. Bobbink	Ericaceae
Rhododendron cv. Mamie	Ericaceae
Rhododendron cv. Mexicali Rose	Ericaceae
Rhododendron cv. Pride of Dorking	Ericaceae
Rhododendron cv. Red Wing	Ericaceae
Rhododendron cv. Roseum Elegans	Ericaceae
Rhododendron cv. Southern Charm	Ericaceae
Rhododendron cv. Trude Webster	Ericaceae
Rhododendron cv. Van Nes Sensation	Ericaceae
Rhombophyllum dolabriforme	Aizoaceae	South Africa
Rhopalostylis baueri	Arecaceae	Australia(Norfolk Is.)
Rhopalostylis baueri v. cheesemanii	Arecaceae	New Zealand(Raoul Is.)
Rhopalostylis sapida	Arecaceae	New Zealand
Rhus integrifolia	Anacardiaceae	S California to Baja, Ca
Rhus lentii	Anacardiaceae	Mexico
Rhus ovata	Anacardiaceae	California
Rhynchospora colorata	Cyperaceae	SE United States
Ribes viburnifolium	Saxifragaceae	S California to NW Mexico
Rohdea japonica	Convallariaceae	China, Japan
Rosa cv. Amber Queen	Rosaceae
Rosa cv. Betty Boop	Rosaceae
Rosa cv. Bill Warriner	Rosaceae
Rosa cv. Dortmund	Rosaceae
Rosa cv. Julia Child	Rosaceae
Rosa cv. Trumpeter	Rosaceae
Rosmarinus officinalis	Lamiaceae	Mediterranean
Rosmarinus officinalis cv. Lockwood de Forest	Lamiaceae
Rosularia pallida	Crassulaceae	Cen Asia
Rotala indica	Lythraceae	Asia
Roystonea regia	Arecaceae	Cuba
Rudbeckia hirta	Asteraceae	E United States
Rudbeckia hirta cv. Cherokee Sunset	Asteraceae
Ruellia brittoniana	Acanthaceae	Mexico
Ruellia macrantha	Acanthaceae	Brazil
Ruellia makoyana	Acanthaceae	Brazil
Ruellia sp.	Acanthaceae
Rumohra adiantiformis	Polypodiaceae	Southern Hemisphere
Ruschia centrocapsula	Aizoaceae	South Africa
Russelia equisetiformis	Scrophulariaceae	Mexico
Sabal bahamensis	Arecaceae	Bahamas
Sabal bermudana	Arecaceae	Bermuda
Sabal blackburniana	Arecaceae	Bahamas(Santa Domingo Cay)
Sabal mauritiiformis	Arecaceae	Cen and S America, Trinidad
Sabal minor	Arecaceae	SE United States
Sabal parviflora	Arecaceae	Cuba
Sabal uresana	Arecaceae	NW Mexico
Sabal yapa	Arecaceae	W Cuba, Mexico(Yucatan),Belize
Saccharum cv.	Poaceae
Sagittaria lancifolia	Alismataceae	American Tropics
Salix babylonica	Salicaceae	Asia
Salix babylonica cv. Crispa	Salicaceae
Salix laevigata	Salicaceae	SW United States
Salix lasiandra	Salicaceae	W N. America
Salix lasiolepis	Salicaceae	W N. America
Salvia apiana	Lamiaceae	California
Salvia brandegei	Lamiaceae	California, Mexico(Baja, CA)
Salvia chamaedryoides	Lamiaceae	Mexico
Salvia chiapensis	Lamiaceae	Mexico
Salvia clevelandii	S California	Mexico
Salvia clevlandii cv. Winifred Gilman	Lamiaceae
Salvia cv. Allen Chickering	Lamiaceae
Salvia cv. Anthony Parker	Lamiaceae
Salvia cv. Bee's Bliss	Lamiaceae
Salvia cv. Dara's Choice	Lamiaceae
Salvia cv. Purple Majesty	Lamiaceae
Salvia cv. Starlight	Lamiaceae
Salvia cv. Vicki Romo	Lamiaceae
Salvia cv. Waverly	Lamiaceae
Salvia elegans	Lamiaceae	S Mexico, Guatemala
Salvia greggii	Lamiaceae	SW Texas to N Cen Mexico
Salvia guaranitica	Lamiaceae	Argentina, Brazil, Paraguay
Salvia leucantha	Lamiaceae	Mexico
Salvia leucantha cv. Amethyst Bluff	Lamiaceae
Salvia leucantha cv. Figueroa	Lamiaceae
Salvia leucantha cv. Point Sal Spreader	Lamiaceae
Salvia mellifera	Lamiaceae	California
Salvia muelleri	Lamiaceae	Mexico
Salvia sagittata	Lamiaceae	Ecuador
Salvia sp.	Lamiaceae
Salvia spathacea	Lamiaceae	Coastal California
Salvia splendens	Lamiaceae	Brazil
Salvia uliginosa	Lamiaceae	South America
Sambucus mexicana	Caprifoliaceae	W N. America
Sambucus nigra cv. Variegata	Caprifoliaceae
Sansevieria deserti	Dracaenaceae	South Africa, Zimbabwe
Sansevieria downsii	Dracaenaceae	Malawi
Sansevieria masoniana	Dracaenaceae	Congo
Sansevieria patens	Dracaenaceae	Africa
Sansevieria rorida	Dracaenaceae	Somalia
Sansevieria trifasciata cv. Moonshine	Dracaenaceae
Sapindus saponaris	Sapindaceae	African Tropics
Sarcostemma stolonifera	Asclepiadaceae	Kenya, N Tanzania
Sarcostemma viminale	Asclepiadaceae	Africa
Sasa veitchii	Poaceae	Japan
Saxifraga stolonifera	Saxifragaceae	E Asia
Scabiosa sp.	Dipsacaceae
Scadoxus multiflorus v. katharinae	Amaryllidaceae	South Africa
Scaevola cv. Pink Carpet	Goodeniaceae
Schizolobium parahybum	Caesalpiniaceae	S Mexico to S Brazil
Schlumbergera russelliana	Cactaceae	Brazil
Schoenus nigricans	Cyperaceae	Europe
Schotia afra	Caesalpiniaceae	SW South Africa
Schotia brachypetala	Caesalpiniaceae	South Africa
Sciadopitys verticillata	Taxodiaceae	Japan
Sedum acre	Crassulaceae	Europe, Asia Minor
Sedum brevifolium	Crassulaceae	W Europe
Sedum clavatum	Crassulaceae	Mexico
Sedum confusum	Crassulaceae	Mexico
Sedum dasyphyllum	Crassulaceae	N Africa, S & W Europe
Sedum hybrid	Crassulaceae
Sedum morganianum	Crassulaceae	Mexico
Sedum ochroleucum	Crassulaceae	Europe
Sedum pachyphyllum	Crassulaceae	S Mexico
Sedum sp.	Crassulaceae
Sedum spathufolium cv. Carnea	Crassulaceae
Sedum spurium cv. Fuldaglut	Crassulaceae
Sedum x rubrotinctum	Crassulaceae
Sedum x rubrotinctum cv. Aurora	Crassulaceae
Selenicereus anthonyanus	Cactaceae	Mexico
Selenicereus chrysocardium	Cactaceae	Mexico(Chiapas)
Selenicereus coniflorus	Cactaceae	E Mexico
Selenicereus grandiflorus	Cactaceae	Jamaica, Cuba
Selenicereus hamatus	Cactaceae	Mexico(Veracruz, Jalapa)
Selenicereus inermis	Cactaceae	Venezuela, Colombia
Selenicereus macdonaldiae	Cactaceae	Central America
Selenicereus testudo	Cactaceae	Mexico to Colombia
Selenicereus wercklei	Cactaceae	Costa Rica
Sempervivum arachnioidium cv. Pekingense	Crassulaceae
Sempervivum calcareum	Crassulaceae	SW Alps
Sempervivum cv. Silverine	Crassulaceae
Senecio articulatus	Asteraceae	South Africa
Senecio articulatus v. variegatus	Asteraceae	South Africa
Senecio citriformis	Asteraceae	South Africa
Senecio haworthii	Asteraceae	South Africa(N. Cape Province)
Senecio jacobsenii	Asteraceae	Kenya, Tanzania
Senecio macroglossus cv. Variegatum	Asteraceae
Senecio mandraliscae	Asteraceae	South Africa
Senecio picticaulis	Asteraceae	E Africa
Senecio sp.	Crassulaceae	Canary Islands
Senecio stapeliiformis v. gregori	Asteraceae
Senecio tropaeolifolius	Asteraceae	South Africa
Senna didymobotrya	Caesalpiniaceae	E Africa
Senna marilandica	Caesalpiniaceae	Eastern United States
Sequoia sempervirens	Taxodiaceae	California, Oregon
Sequoia sempervirens cv. Santa Cruz	Taxodiaceae
Serenoa repens	Arecaceae	SE United States
Sesleria autumnalis	Poaceae	Italy
Setaria palmifolia	Poaceae	India
Silene regia	Caryophyllaceae	Central United States
Sinarundinaria nitida	Poaceae	Cen China
Sisyrinchium californicum	Iridaceae	N CA to British Columbia
Solanum jasminoides	Solanaceae	Brazil
Soleirolia soleirolii	Urticaceae	Mediterranean
Sollya heterophylla	Pittosporaceae	Australia
Sonchus acaulis	Asteraceae	Spain(Canary Islands)
Sparmannia africana	Tiliaceae	South Africa
Spathiphyllum sp.	Araceae
Sphaeropteris cooperi	Cyatheaceae	Australia
Sphaeropteris cooperi cv. Brentwood	Cyatheaceae
Sphaeropteris medullaris	Cyatheaceae	New Zealand
Spilanthes oleracea	Asteraceae	Brazil
Sporobolus airoides	Poaceae	W United States
Stachys byzantina	Lamiaceae	Turkey
Stangeria eriopus	Stangeriaceae	South Africa
Stanhopea wardii	Orchidaceae	Mexico
Stapelia nobilis	Asclepiadaceae	South Africa, Mozambique
Stenocactus aff. pentacanthus	Cactaceae	Mexico
Stenocactus ochoterenanus	Cactaceae	Mexico
Stenocactus phyllacanthus	Cactaceae	Mexico
Stenocactus vaupelianus	Cactaceae	Mexico(Hidalgo)
Stenocarpus sinuatus	Proteaceae	E Australia
Stenocereus alamosensis	Cactaceae	Mexico(Chihuahua, Sonora)
Stenocereus beneckei	Cactaceae	Mexico
Stenocereus eruca	Cactaceae	Mexico(Baja California Sur)
Stenocereus fimbriatus	Cactaceae	Caribbean
Stenocereus griseus	Cactaceae	Mexico to Venezuela
Stenocereus gummosus	Cactaceae	S California to Mexico
Stenocactus kerberi	Cactaceae	Mexico(Sinaloa, Colima)
Stenocereus macdowellii	Cactaceae
Stenocereus pruinosus	Cactaceae	Cen & S Mexico
Stenocereus sp.	Cactaceae	Mexico
Stenocereus stellatus	Cactaceae	Mexico
Stenocereus thurberi	Cactaceae	S Arizona to Mexico
Stenocereus thurberi ssp. littoralis	Cactaceae	S Arizona to Mexico
Stenocereus victoriensis	Cactaceae
Stenochlaena tenuifolia	Blechnaceae	Asia
Stephanotis floribunda	Asclepiadaceae	Madagascar
Sterculia africana	Sterculiaceae	Zimbabwe
Sterculia quinqueloba	Sterculiaceae	Zimbabwe
Stetsonia coryne	Cactaceae	Argentina, Bolivia
Strelitzia juncea	Strelitziaceae	South Africa
Strelitzia nicolai	Strelitziaceae	South Africa
Strelitzia reginae	Strelitziaceae	Africa
Strelitzia reginae cv. Mandela's Gold	Strelitziaceae
Streptocarpus x hybridus	Gesneriaceae
Stromanthe sanguinea	Marantaceae	Brazil
Sutherlandia frutescens	Papilionaceae	South Africa, Namibia
Swietenia mahagoni	Meliaceae	Carribean
Syagrus comosa	Arecaceae	Brazil
Syagrus coronata	Arecaceae	Brazil
Syagrus flexuosa	Arecaceae	Brazil
Syagrus romanzoffiana	Arecaceae	Australia
Syagrus schizophylla	Arecaceae	Brazil
Syagrus sp.	Arecaceae	Bolivia
Synadenium cupulare	Euphorbiaceae	South Africa
Synadenium grantii f. rubra	Euphorbiaceae	Uganda, Tanzania, Mozambique
Syzygium dombeyi	Myrtaceae	Brazil
Syzygium paniculatum	Myrtaceae	Australia
Syzygium paniculatum cv. Globulus	Myrtaceae
Syzygium paniculatum cv. Monterey Bay	Myrtaceae
Syzygium paniculatum cv. Teenie Genie	Myrtaceae
Tabebuia chrysantha	Bignoniaceae	Mexico to Venezuela
Tabebuia chrysotricha	Bignoniaceae	Brazil, Colombia
Tabebuia sp.	Bignoniaceae
Tagetes lemmonii	Asteraceae	SW United States
Taiwania cryptomerioides	Cupressaceae	SW China, Upper Burma
Tanacetum niveum	Asteraceae
Tanacetum parthenium cv. Aureum	Asteraceae
Tanacetum vulgare	Asteraceae	Europe
Tasmannia lanceolata	Winteraceae	Australia(Tasmania)
Taxodium distichum cv. Cajun Snowflake	Taxodiaceae
Taxodium mucronatum	Taxodiaceae	Mexico
Tecoma cv. Orange Julius	Bignoniaceae
Tellima grandiflora	Saxifragaceae	Cen California to Alaska
Tephrocactus articulatus v. papyracantha	Cactaceae	Argentina
Ternstroemia gymnanthera	Theaceae	India to Malaysia & Cen Japan
Tetradenia sp. nov.	Lamiaceae	Madagascar
Tetrapanax papyriferus	Araliaceae	China, Taiwan
Thalia dealbata	Marantaceae	SE United States
Thalictrum aquilegifolium	Ranunculaceae	Europe, Asia
Thalictrum dipterocarpum	Ranunculaceae	W China
Thalictrum flavum	Ranunculaceae	Eurasia
Thalictrum foetidum	Ranunculaceae	Cen Europe
Thalictrum minus ssp. saxatile	Ranunculaceae	Europe, N Asia
Thalictrum simplex	Ranunculaceae	Europe
Thelocactus setispinus	Cactaceae	S Texas to NE Mexico
Thelocactus sp.	Cactaceae	Mexico
Thelocactus tulensis	Cactaceae	Mexico
Thelypteris ovata	Polypodiaceae	SW U.S.
Thelypteris puberula	Polypodiaceae	S California to Mexico
Thujopsis dolabrata	Cupressaceae	Japan
Thysanolaena maxima	Poaceae	China
Tillandsia streptophylla x brachycaulos cv. Eric Knobloch	Bromeliaceae
Tillandsia albertiana	Bromeliaceae	NW Argentina
Tillandsia araujei	Bromeliaceae	Brazil
Tillandsia bergeri	Bromeliaceae	Argentina
Tillandsia butzii	Bromeliaceae	Mexico to Cen America
Tillandsia concolor	Bromeliaceae	Mexico, El Salvador
Tillandsia crocata	Bromeliaceae	Brazil, Argentina, Uruguay
Tillandsia cyanea	Bromeliaceae	Ecuador
Tillandsia duratii	Bromeliaceae	Bolivia, Paraguay, Argentina
Tillandsia edithae	Bromeliaceae	Bolivia
Tillandsia eizii	Bromeliaceae	Mexico
Tillandsia fasciculata	Bromeliaceae	Florida & Mexico to Colombia
Tillandsia fasciculata v. venosispica	Bromeliaceae	Mexico to Colombia, W. Indies
Tillandsia flabellata	Bromeliaceae	Mexico, Cen America
Tillandsia guatemalensis	Bromeliaceae	Mexico to Cen America
Tillandsia intermedia	Bromeliaceae	Mexico
Tillandsia ionantha	Bromeliaceae	Mexico to Costa Rica
Tillandsia ionantha cv. Druid	Bromeliaceae
Tillandsia ionantha cv. Peanut	Bromeliaceae
Tillandsia juncea	Bromeliaceae	Mexico to South America
Tillandsia juncea hybrid	Bromeliaceae
Tillandsia lajensis	Bromeliaceae	Ecuador
Tillandsia leonamiana	Bromeliaceae	Brazil
Tillandsia mallemontii	Bromeliaceae	Brazil
Tillandsia paucifolia	Bromeliaceae	Fla.,Cuba,Bahamas,CO to Mexico
Tillandsia recurvata	Bromeliaceae	S U.S. to South America
Tillandsia roezlii	Bromeliaceae	Peru
Tillandsia roseospicata	Bromeliaceae
Tillandsia sp.	Bromeliaceae
Tillandsia straminea	Bromeliaceae	Peru, Ecuador
Tillandsia streptophylla	Bromeliaceae	Mexico
Tillandsia stricta x albertiana	Bromeliaceae
Tillandsia tectorum	Bromeliaceae	Ecuador, Peru
Tillandsia tricolor	Bromeliaceae	Mexico to Costa Rica
Tillandsia usneoides	Bromeliaceae	SE U.S. to South America
Tillandsia usneoides v. major	Bromeliaceae	SE U.S. to South America
Tillandsia usneoides x recurvata	Bromeliaceae
Tithonia rotundifolia	Asteraceae	Mexico to Cen America
Todea barbara	Osmundaceae	Aust., New Zealand, S. Africa
Tournefortia acutiflora	Boraginaceae	Mexico
Trachelospermum jasminoides	Apocynaceae	China
Trachycarpus fortunei	Arecaceae	China, Japan
Trachycarpus martianus	Arecaceae	Himalayas
Trachycarpus takil	Arecaceae	Himalayas
Trachycarpus wagnerianus	Arecaceae	Cultivated origin
Tradescantia pallida cv. Large Purple Heart	Commelinaceae
Tradescantia sillamontana	Commelinaceae	NE Mexico
Trevesia palmata	Araliaceae	India to China
Trichodiadema bulbosum	Aizoaceae	South Africa
Tristania conferta	Myrtaceae	Australia(New South Wales)
Trithrinax acanthocoma	Arecaceae	Brazil
Trithrinax brasiliensis	Arecaceae	Carribean
Tropaeolum majus	Tropaeolaceae	South America
Tulbaghia violacea	Alliaceae	South Africa
Turbinicarpus horripilus	Cactaceae	Mexico(Hidalgo)
Tylecodon paniculata	Crassulaceae	South Africa
Tylecodon sinus-alexandrii	Crassulaceae	South Africa
Tylecodon sp.	Crassulaceae
Ulmus americana	Ulmaceae	E North America
Ulmus parvifolia	Ulmaceae	China, Japan
Uncarina ihlenfeldtiana	Pedaliaceae	Madagascar
Uncarina leptocarpa	Pedaliaceae	Madagascar
Uncarina roeoseliana	Pedaliaceae	Madagascar
Urginea maritima	Hyacinthaceae	Mediterranean, Portugal
Ursulaea tuitensis	Bromeliaceae	Mexico(Jalisco)
Veltheimia bracteata	Hyacinthaceae	South Africa
Veltheimia capensis	Hyacinthaceae	South Africa
Verticordia plumosa	Myrtaceae	W Australia
Viburnum tinus cv. Spring Bouquet	Caprifoliaceae
Victoria cruziana	Nymphaeaceae	South America
Victoria cv. Adventure	Nymphaeaceae
Victoria cv. Challenger	Nymphaeaceae
Victoria cv. Discovery	Nymphaeaceae
Viminaria juncea	Papilionaceae	Australia
Viola hederacea	Violaceae	Australia
Vitis californica cv. Rogers Red	Vitaceae
Vriesea carinata hybrid	Bromeliaceae
Vriesea cv. Warmingii	Bromeliaceae
Vriesea ensiformis	Bromeliaceae	Brazil
Vriesea erythrodactylon	Bromeliaceae	Brazil
Vriesea espinosae	Bromeliaceae	Ecuador
Vriesea fosteriana	Bromeliaceae	Brazil
Vriesea fosteriana cv. Red Chestnut	Bromeliaceae
Vriesea fosteriana x gigantea	Bromeliaceae
Vriesea fosteriana x hieroglyphica	Bromeliaceae
Vriesea platynema v. platynema	Bromeliaceae	South America
Vriesea platynema v. variegata	Bromeliaceae	E Brazil
Vriesea platynema x gigantea	Bromeliaceae
Vriesea saundersii	Bromeliaceae	Brazil
Vriesea sceptrum cv. Sceptre D'or	Bromeliaceae
Vriesea sp.	Bromeliaceae	Brazil
Vriesea splendens	Bromeliaceae	N South America
Vriesea sucrei	Bromeliaceae	Brazil
Vriesea x vigeri	Bromeliaceae
Wachendorfia thyrsiflora	Haemodoraceae	South Africa
Wallichia disticha	Arecaceae	Himalayas
Washingtonia filifera	Arecaceae	SW United States
Washingtonia robusta	Arecaceae	NW Mexico
Weberbauerocereus callanus	Cactaceae	Peru
Weberbauerocereus cuzcoensis	Cactaceae	Peru
Weberbauerocereus johnsonii	Cactaceae	Peru(Cajamarca)
Weberbauerocereus longicomus	Cactaceae	Peru(Cajamarca)
Weberbauerocereus rauhii	Cactaceae	Peru
Weberbauerocereus sp.	Cactaceae	Peru
Weberbauerocereus weberbaueri	Cactaceae	S Peru, N Chile
Weberbauerocereus weberbaueri v. horribilis	Cactaceae	S Peru, N Chile
Weberbauerocereus winterianus	Cactaceae	Peru
Weberbauerocereus winterianus v. australis	Cactaceae	Peru
Welwitschia mirabilis	Welwitschiaceae	Angola, Namibia
Werauhia werckliana	Bromeliaceae
Werckleocereus glaber v. mirandae	Cactaceae	Mexico
Westringia fruticosa	Lamiaceae	Australia(New South Wales)
Widdringtonia nodiflora	Cupressaceae	S. Africa, Mozambique,Zimbabwe
Widdringtonia schwarzii	Cupressaceae	South Africa(E. Cape Prov.
Wisteria floribunda	Fabaceae	Japan
Wisteria sinensis	Fabaceae	China
Wittrockia superba	Bromeliaceae	Brazil
Wollemia nobilis	Araucariaceae	Australia(New South Wales)
Woodwardia fimbriata	Polypodiaceae	California to Baja California
Woodwardia radicans	Polypodiaceae	Europe
Xanthorrhoea fulva	Xanthorrhoeaceae	Australia
Xanthorrhoea preisii	Xanthorrhoeaceae	SW Australia
Xanthorrhoea quadrangulata	Xanthorrhoeaceae	Australia
Xanthosoma sp.	Araceae
Xerosicyos danguyi	Cucurbitaceae	Madagascar
Yucca aloifolia cv. Marginata	Agavaceae
Yucca endlichiana	Agavaceae	Mexico
Yucca filifera	Agavaceae	Texas, N Mexico
Yucca periculosa	Agavaceae	Mexico
Yucca schidigera	Agavaceae	California, NW AZ, SW Nevada
Yucca thompsoniana	Agavaceae	Mexico
Yungasocereus inquisivensis	Cactaceae	Bolivia(La Paz)
Zamia amblyphyllidia	Zamiaceae	Puerto Rico, Cuba, Jamaica
Zamia boliviana	Zamiaceae	N. Bolivia
Zamia cremnophila	Zamiaceae	Mexico(Tabasco)
Zamia fairchildiana	Zamiaceae	Costa Rica, Panama
Zamia fischeri	Zamiaceae	Mexico
Zamia furfuracea	Zamiaceae	Mexico
Zamia herrerae	Zamiaceae	Pac. Coastal Cen Am. & S Mex.
Zamia integrifolia	Zamiaceae	Florida, Bahamas
Zamia integrifolia forma nov. "Bahamas"	Zamiaceae	Florida, Bahamas, Jamaica
Zamia integrifolia forma nov. "New Providence"	Zamiaceae	Florida, Bahamas, Jamaica
Zamia lacandona	Zamiaceae	Mexico(Chiapas)
Zamia loddigesii	Zamiaceae	Mexico, Belize, Guatemala
Zamia muricata	Zamiaceae	N Venezuela, Colombia
Zamia poeppigiana	Zamiaceae	Peru
Zamia pumila	Zamiaceae	Cuba, Pto Rico, Dominican Rep.
Zamia skinneri	Zamiaceae	Panama
Zamia soconuscensis	Zamiaceae	Mexico(Chiapas)
Zamia sp.	Zamiaceae
Zamia spartea	Zamiaceae	Mexico, Guatemala
Zamia splendens	Zamiaceae	Mexico
Zamia standleyi	Zamiaceae	Honduras
Zamia variegata	Zamiaceae	Mexico, Guatemala, Belize
Zamia verschafeltii	Zamiaceae	Mexico(Chiapas)
Zamioculcas zamiifolia	Araceae	Tanzania
Zantedeschia aethiopica	Araceae	South Africa
Zantedeschia cv.	Araceae
Zantedeschia cv. Green Goddess	Araceae
Zantedeschia cv. Hercules	Araceae
Zieria pilosa	Rutaceae	Australia
Ziziphus jujuba	Rhamnaceae	SE Europe to China
Zombia antillarum	Arecaceae	Haiti
Zygosicyos pubescens	Cucurbitaceae	Madagascar