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Range and rarity
Rare (≤ 5 counties)
A broader rarity slice: taxa known from five counties or fewer nationwide. Includes single-county endemics plus the next-most-restricted species.
- Matching taxa
- 9,281
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- max_counties=5
Showing 8,951–9,000 of 9,281.
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Tripsacum floridanum Porter ex Vasey TRFL4Florida gamagrass · Poaceae - Tripsacum lanceolatum Rupr. ex Fourn. TRLA11Mexican gamagrass · Poaceae
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Tripterocalyx carneus (Greene) L.A. Galloway var. carneus TRCAC7winged sandpuffs · Nyctaginaceae -
Triraphis mollis R. Br. TRMO20purple needlegrass · Poaceae -
Trisetum glomeratum (Kunth) Trin. ex Steud. TRGL3pili uka · Poaceae - Trisetum inaequale Whitney TRIN4Whitney's false oat · Poaceae
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Trisetum sibiricum Rupr. TRSI2Siberian oatgrass · Poaceae -
Trisetum sibiricum Rupr. ssp. litorale Rupr. ex Rosh. TRSILSiberian oatgrass · Poaceae -
Triteleia clementina Hoover TRCLSan Clemente Island triteleia · Liliaceae -
Triteleia crocea (Alph. Wood) Greene var. modesta (H.M. Hall) Hoover TRCRMyellow triteleia · Liliaceae -
Triteleia hendersonii Greene var. leachiae (M. Peck) Hoover TRHELLeach's triteleia · Liliaceae -
Triteleia ixioides (W.T. Aiton) Greene ssp. cookii (Hoover) Lenz TRIXCCook's triteleia · Liliaceae -
Triteleia lemmoniae (S. Watson) Greene TRLE4Oak Creek triteleia · Liliaceae - Triteleia versicolor Hoover TRVE3pinto triteleia · Liliaceae
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Triteleiopsis palmeri (S. Watson) Hoover TRPA9Palmer's Bajalily · Liliaceae -
Triticum spelta L. TRSP3spelt · Poaceae -
Triticum turgidum L. TRTU2rivet wheat · Poaceae -
Triumfetta rhomboidea Jacq. TRRHdiamond burbark · Tiliaceae -
Tropidia polystachya (Sw.) Ames TRPO5young palm orchid · Orchidaceae -
Tsuga ×jeffreyi (Henry) Henry [heterophylla × mertensiana] TSJEhybrid hemlock · Pinaceae -
Tuctoria mucronata (Crampton) J. Reeder TUMUprickly spiralgrass · Poaceae -
Tulipa clusiana DC. TUCLlady tulip · Liliaceae -
Tulipa gesneriana L. TUGEDidier's tulip · Liliaceae -
Tumamoca macdougalii Rose TUMATumamoc globeberry · Cucurbitaceae -
Turbina corymbosa (L.) Raf. TUCOChristmasvine · Convolvulaceae -
Turgenia latifolia (L.) Hoffm. TULAbroadleaf false carrot · Apiaceae -
Turnera diffusa Willd. ex Schult. TUDIdamiana · Turneraceae -
Turnera diffusa Willd. ex Schult. var. aphrodisiaca (G.H. Ward) Urb. TUDIAdamiana · Turneraceae - Twisselmannia californica Al-Shehbaz TWCAking's gold · Brassicaceae
- Typha ×bethulona Costa [domingensis × latifolia] TYBETyphaceae
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Ulmus pumila × rubra [unnamed hybrid] ULPU2hybrid elm · Ulmaceae - Ulva clathratioides L.G. Kraft, Kraft, & R.F. Waller ULCLsea lettuce · Ulvaceae
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Ulva pertusa Kjellman ULPEsea lettuce · Ulvaceae -
Umbellularia californica (Hook. & Arn.) Nutt. var. fresnensis Eastw. UMCAFCalifornia laurel · Lauraceae -
Uncinia brevicaulis Thouars UNBRfalse watermeal · Cyperaceae -
Uncinia hamata (Sw.) Urb. UNHAbirdcatching sedge · Cyperaceae - Uncinia uncinata (L. f.) Kük. UNUNHawai'i birdcatching sedge · Cyperaceae
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Urera glabra (Hook. & Arn.) Weddell URGLhopue · Urticaceae -
Urera kaalae Wawra URKAopuhe · Urticaceae -
Urochloa arrecta (Hack. ex T. Dur. & Schinz) O. Morrone & F. Zuloaga URAR2African signalgrass · Poaceae -
Urochloa deflexa (Schumach.) H. Scholz URDE2deflexed brachiaria · Poaceae -
Urochloa panicoides P. Beauv. URPApanic liverseed grass · Poaceae -
Urospermum picroides (L.) Scop. ex F.W. Schmidt URPIprickly goldenfleece · Asteraceae - Urvillea ulmacea Kunth URULapaac · Sapindaceae
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Usnea flammea Stirt. USFL3flame beard lichen · Parmeliaceae -
Utricularia amethystina Salzm. ex A. St.-Hil. & Girard UTAMFlorida purple bladderwort · Lentibulariaceae -
Vaccinium calycinum Sm. VACA8ohelo kau la'au · Ericaceae -
Vaccinium dentatum Sm. VADE2ohelo · Ericaceae -
Vaccinium reticulatum Sm. VAREohelo 'ai · Ericaceae -
Vaccinium simulatum Small VASI2upland highbush blueberry · Ericaceae