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
- 9,281
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- max_counties=5
Showing 7,651–7,700 of 9,281.
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Romneya coulteri Harv. ROCOCoulter's Matilija poppy · Papaveraceae -
Romneya trichocalyx Eastw. ROTR2bristly Matilija poppy · Papaveraceae -
Romulea rosea (L.) Eckl. ROROrosy sandcrocus · Iridaceae -
Romulea rosea (L.) Eckl. var. australis (Ewart) de Vos ROROArosy sandcrocus · Iridaceae -
Rorippa amphibia (L.) Besser ROAMgreat yellowcress · Brassicaceae -
Rorippa curvisiliqua (Hook.) Besser ex Britton var. nuttallii (S. Watson) R. Stuckey ROCUNNuttall's yellowcress · Brassicaceae -
Rorippa curvisiliqua (Hook.) Besser ex Britton var. occidentalis (Greene) R. Stuckey ROCUOwestern yellowcress · Brassicaceae -
Rorippa globosa (Turcz. ex Fisch. & C.A. Mey.) Hayek ROGL2globe yellowcress · Brassicaceae -
Rorippa indica (L.) Hiern. var. indica ROINIvariableleaf yellowcress · Brassicaceae - Rorippa intermedia (Kuntze) R. Stuckey ROIN2intermediate yellowcress · Brassicaceae
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Rorippa islandica (Oeder) Borbás ROIS2northern marsh yellowcress · Brassicaceae - Rorippa ramosa Rollins RORA2Durango yellowcress · Brassicaceae
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Rorippa sarmentosa (G. Forst. ex DC.) J.F. Macbr. ROSAlongrunner · Brassicaceae - Rorippa ×prostrata (Bergeret) Schinz & Thell. (pro sp.) [sylvestris × amphibia] ROPR4prostrate yellowcress · Brassicaceae
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Rosa acicularis Lindl. ssp. acicularis ROACAprickly rose · Rosaceae -
Rosa blanda Aiton var. glabra Crép. ROBLGsmooth rose · Rosaceae - Rosa ferruiginea Vill. ROFE5redleaf rose · Rosaceae
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Rosa gymnocarpa Nutt. var. serpentina Ertter & W.H.Lewis ROGYSGasquet rose · Rosaceae - Rosa manca Greene ROMA3Mancos rose · Rosaceae
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Rosa minutifolia Engelm. ROMI80Baja rose · Rosaceae -
Rosa moschata J. Herrm. ROMOmusk rose · Rosaceae - Rosa myriadenia Greene, nom. inq. ROMYglandular rose · Rosaceae
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Rosa pinetorum A. Heller, nom. inq. ROPIpine rose · Rosaceae -
Rosa sherardii Davies ROSH2Sherard's downy rose · Rosaceae - Rosa sicula Tratt. ROSI5Mediterranean rose · Rosaceae
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Rosa stellata Wooton ssp. abyssa A. Phillips ROSTAdesert rose · Rosaceae -
Rosa stellata Wooton ssp. mirifica (Greene) W.H. Lewis ROSTMdesert rose · Rosaceae -
Rosa stellata Wooton ssp. mirifica (Greene) W.H. Lewis var. erlansoniae W.H. Lewis ROSTE2desert rose · Rosaceae -
Rosa stellata Wooton ssp. mirifica (Greene) W.H. Lewis var. mirifica (Greene) Cockerell ROSTM2desert rose · Rosaceae -
Rosa stellata Wooton ssp. stellata ROSTSdesert rose · Rosaceae -
Rosa tomentosa Sm. ROTOwhitewoolly rose · Rosaceae -
Rosa villosa L. ROVI80apple rose · Rosaceae -
Rosa woodsii Lindl. var. glabrata (Parish) Cole ROWOGWoods' rose · Rosaceae -
Rosa woodsii Lindl. var. gratissima (Greene) Cole ROWOG2Tehachapi rose · Rosaceae - Rosa ×borboniana N.H.F. Desp. (pro sp.) [chinensis × damascena] ROBO3Bourbon rose · Rosaceae
- Rosa ×dulcissima Lunell (pro sp.) [blanda × woodsii] RODUhybrid rose · Rosaceae
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Rosa ×dumetorum Thuill. [canina × obtusifolia] RODU5corymb rose · Rosaceae - Rosa ×housei Erlanson (pro sp.) [acicularis × blanda] ROHO3hybrid rose · Rosaceae
- Rosa ×rehderiana Blackb. [chinensis × multiflora] RORE3polyantha rose · Rosaceae
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Rosmarinus officinalis L. ROOFrosemary · Lamiaceae -
Rotala rotundifolia (Buch.-Ham. ex Roxb.) Koehne RORO7dwarf rotala · Lythraceae -
Rousselia humilis (Sw.) Urb. ROHUshineseed · Urticaceae -
Roystonea regia (Kunth) O.F. Cook, nom. cons. RORE2royal palm · Arecaceae -
Rubus alaskensis L.H. Bailey RUAL6Alaska blackberry · Rosaceae - Rubus aliceae L.H. Bailey RUAL7roadside raspberry · Rosaceae
- Rubus andrewsianus Blanch. RUAN2Andrews' blackberry · Rosaceae
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Rubus bartonianus M. Peck RUBABarton's raspberry · Rosaceae -
Rubus bifrons × ursinus [unnamed hybrid] RUBI7hybrid blackberry · Rosaceae - Rubus burnhamii L.H. Bailey RUBUBurnham's blackberry · Rosaceae
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Rubus caesius L. RUCAEuropean dewberry · Rosaceae