Explore / Range and rarity / Rare (≤ 5 counties)
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
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Showing 7,751–7,800 of 9,281.
- Rubus trifrons Blanch. RUTR4threeleaflet dewberry · Rosaceae
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Rubus tygartensis H.A. Davis & T. Davis RUTYTaylor County blackberry · Rosaceae -
Rubus ulmifolius Schott var. ulmifolius RUULU2elmleaf blackberry · Rosaceae -
Rubus uniformis L.H. Bailey RUUNthornless dewberry · Rosaceae - Rubus vagus L.H. Bailey RUVArambling dewberry · Rosaceae
- Rubus variispinus L.H. Bailey RUVA3Vicksburg blackberry · Rosaceae
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Rubus vestitus Weihe RUVEEuropean blackberry · Rosaceae - Rubus vigilis L.H. Bailey RUVI11Missouri blackberry · Rosaceae
- Rubus vitifolius Cham. & Schltdl. var. vitifolius RUVIVPacific dewberry · Rosaceae
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Rudbeckia alpicola Piper RUAL17showy coneflower · Asteraceae -
Rudbeckia hirta L. var. angustifolia (T.V. Moore) Perdue RUHIAblackeyed Susan · Asteraceae -
Rudbeckia klamathensis P. Cox & Urbatsch RUKLKlamath coneflower · Asteraceae -
Rudbeckia laciniata L. var. bipinnata Perdue RULABcutleaf coneflower · Asteraceae -
Rudbeckia laciniata L. var. digitata (Mill.) Fiori RULADcutleaf coneflower · Asteraceae -
Rudbeckia laciniata L. var. heterophylla (Torr. & A. Gray) Fernald & B.G. Schub. RULAH3cutleaf coneflower · Asteraceae -
Rudbeckia triloba L. var. rupestris (Chickering) A. Gray RUTRRbrowneyed Susan · Asteraceae -
Ruellia brevifolia (Pohl) Ezcurra RUBR12tropical wild petunia · Acanthaceae -
Ruellia caroliniensis (J.F. Gmel.) Steud. ssp. caroliniensis var. succulenta (Small) R.W. Long RUCAS7Carolina wild petunia · Acanthaceae -
Ruellia ciliatiflora Hook. RUCI3hairyflower wild petunia · Acanthaceae -
Ruellia corzoi Tharp & F.A. Barkley RUCOCorzo's wild petunia · Acanthaceae -
Ruellia davisiorum Tharp & F.A. Barkley RUDARio Grande wild petunia · Acanthaceae - Ruellia malacosperma Greenm. RUMA9softseed wild petunia · Acanthaceae
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Ruellia prostrata Poir. RUPR18prostrate wild petunia · Acanthaceae -
Rumex acetosa L. ssp. thyrsiflorus (Fingerh.) Hayek RUACTgarden sorrel · Polygonaceae -
Rumex albescens Hillebr. RUAL5Oahu dock · Polygonaceae -
Rumex alpinus L. RUAL3Munk's rhubarb · Polygonaceae -
Rumex brownei Campd. RUBR2Browne's dock · Polygonaceae -
Rumex giganteus Aiton RUGIpawale · Polygonaceae - Rumex hesperius Greene RUHE7western willow dock · Polygonaceae
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Rumex kerneri Borbás RUKEKerner's dock · Polygonaceae - Rumex krausei Jurtzev & V.V. Petrovsky RUKRKrause's sorrel · Polygonaceae
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Rumex lapponicus (Hiitonen) Czern. RULA9dock · Polygonaceae - Rumex nematopodus Rech. f. RUNE4Arizona dock · Polygonaceae
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Rumex palustris Sm. RUPA12marsh dock · Polygonaceae -
Rumex paucifolius Nutt. ssp. gracilescens (Rech. f.) Rech. f. RUPAG2alpine sheep sorrel · Polygonaceae -
Rumex salicifolius Weinm. var. angustivalvis Danser RUSAAwillow dock · Polygonaceae -
Rumex skottsbergii O. Deg. & I. Deg. RUSKlava dock · Polygonaceae - Rumex tomentellus Rech. f. RUTOWillow Creek dock · Polygonaceae
- Rumex ×confusus Simonkai [crispus × patientia] RUCO7dock · Polygonaceae
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Rupertia hallii (Rydb.) J. Grimes RUHA5Hall's California tea · Fabaceae -
Rupertia rigida (Parish) J. Grimes RURI2Parish's California tea · Fabaceae -
Rytidosperma biannulare (Zotov) Connor & Edgar RYBIwallaby grass · Poaceae -
Rytidosperma caespitosum (Gaudich.) Connor & Edgar RYCAtufted wallaby grass · Poaceae -
Rytidosperma racemosum (R. Br.) Connor & Edgar RYRAwallaby grass · Poaceae - Sabal bermudana L.H. Bailey SABEBermuda palm · Arecaceae
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Sabal mexicana Mart. SAME8Rio Grande palmetto · Arecaceae - Sabal ×brazoriensis D.H. Goldman, Lockett, & Read [minor × palmetto] SABR4Brazoria palmetto · Arecaceae
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Saccharum spontaneum L. SASPwild sugarcane · Poaceae -
Sachsia polycephala Griseb. SAPO3Bahama sachsia · Asteraceae -
Sadleria wagneriana D.D. Palmer & T. Flynn SAWA3Wagner's Plume Fern · Blechnaceae