Explore / Range and rarity / Single-county taxa
Range and rarity
Single-county taxa
Taxa documented in only a single county across the entire catalogue. Mostly local endemics, sub-rank curiosities, and rarely-collected outliers — the eccentric edge of the flora.
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Showing 2,901–2,950 of 3,373.
- Schiedea sarmentosa O. Deg. & Sherff SCSA4cliff schiedea · Caryophyllaceae
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Schiedea spergulina A. Gray SCSPcanyon schiedea · Caryophyllaceae -
Schiedea spergulina A. Gray var. leiopoda Sherff SCSPLcanyon schiedea · Caryophyllaceae -
Schiedea spergulina A. Gray var. spergulina SCSPScanyon schiedea · Caryophyllaceae -
Schiedea stellarioides H. Mann SCST3lau lihilihi · Caryophyllaceae -
Schiedea verticillata F. Br. SCVE3Devils Slide schiedea · Caryophyllaceae - Schizachyrium spadiceum (Swallen) Wipff SCSP4honey bluestem · Poaceae
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Schoenocrambe argillacea (S.L. Welsh & N.D. Atwood) Rollins SCAR5Uinta Basin plainsmustard · Brassicaceae - Schoenoplectiella ×magrathii F.M. Sm. & P.M. McKenzie [hallii × saximontana] SCMA11Magrath's bulrush · Cyperaceae
- Schoenoplectus ×contortus (Eames) S.G. Sm. [americanus × pungens] SCCO20bulrush · Cyperaceae
- Scleria bourgeaui Boeckeler SCBO3Bourgeau's nutrush · Cyperaceae
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Scleria purpurascens Steud. SCPU15Cyperaceae -
Scrophularia auriculata L. SCAU7shoreline figwort · Scrophulariaceae -
Scrophularia canina L. SCCA20dog figwort · Scrophulariaceae -
Scrophularia laevis Wooton & Standl. SCLA5Organ Mountain figwort · Scrophulariaceae -
Scrophularia peregrina L. SCPE11Mediterranean figwort · Scrophulariaceae -
Scrophularia umbrosa Dumort. SCUMwater figwort · Scrophulariaceae -
Scrophularia villosa Pennell SCVISanta Catalina figwort · Scrophulariaceae -
Scutellaria altissima L. SCAL4tall skullcap · Lamiaceae - Scutellaria caerulea Moc. & Sessé SCCA31blue skullcap · Lamiaceae
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Scutellaria ovata Hill ssp. mexicana Epling SCOVMheartleaf skullcap · Lamiaceae -
Scutellaria potosina Brandegee ssp. potosina var. davisiana B.L. Turner SCPODMexican skullcap · Lamiaceae -
Sedella leiocarpa H. Sharsm. SELE7Lake County mock stonecrop · Crassulaceae -
Sedum citrinum Zika SECI6Blue Creek stonecrop · Crassulaceae -
Sedum dendroideum Moc. & Sessé ex A. DC. SEDE8tree stonecrop · Crassulaceae -
Sedum diffusum S. Watson SEDI13Crassulaceae -
Sedum eastwoodiae (Britton) A. Berger SEEA2Red Mountain stonecrop · Crassulaceae -
Sedum lineare Thunb. SELI10needle stonecrop · Crassulaceae -
Sedum mexicanum Britton SEME3Mexican stonecrop · Crassulaceae -
Sedum moranii R.T. Clausen SEMO5Rogue River stonecrop · Crassulaceae -
Sedum nanifolium Fröd. SENAdwarf stonecrop · Crassulaceae -
Sedum ochroleucum Chaix SEOCEuropean stonecrop · Crassulaceae -
Sedum oreganum Nutt. ssp. oreganum SEOROOregon stonecrop · Crassulaceae -
Sedum oreganum Nutt. ssp. tenue R.T. Clausen SEORTOregon stonecrop · Crassulaceae -
Sedum radiatum S. Watson ssp. radiatum SERARCoast Range stonecrop · Crassulaceae -
Sedum valens Björk SEVA5Idaho stonecrop · Crassulaceae -
Selaginella eatonii Hieron. ex Small SEEAEaton's spikemoss · Selaginellaceae -
Selaginella willdenowii (Desv. ex Poir.) Baker SEWIWilldenow's spikemoss · Selaginellaceae -
Selenia jonesii Cory var. obovata Rollins SEJOOJones' selenia · Brassicaceae -
Selinocarpus maloneanus B.L. Turner SEMA17gypsum moonpod · Nyctaginaceae -
Senecio cannabifolius Less. SECA7Aleutian ragwort · Asteraceae - Senecio cannabinifolius Hook. & Arn. SECA5hempleaf ragwort · Asteraceae
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Senecio ertterae T.M. Barkley SEER4Ertter's ragwort · Asteraceae -
Senecio erucifolius L. SEER5hoary ragwort · Asteraceae -
Senecio lyonii A. Gray SELYisland senecio · Asteraceae -
Senecio musiniensis S.L. Welsh SEMU12Musinea ragwort · Asteraceae - Senecio quaylei T.M. Barkley SEQU3Quayle's ragwort · Asteraceae
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Senecio squalidus L. SESQoxford ragwort · Asteraceae -
Senna artemisioides (Gaudich. ex DC.) Randell ssp. ×coriacea (Benth.) Randell [? × cardiosperma ssp. gawlerensis] SEARCscented senna · Fabaceae -
Senna atomaria (L.) Irwin & Barneby SEAT3flor de San Jose · Fabaceae