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 301–350 of 2,993.
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Astrolepis cochisensis (Goodding) Benham & Windham ssp. arizonica Benham ASCOA2Arizona scaly cloakfern · Pteridaceae -
Atamisquea emarginata Miers ex Hook. & Arn. ATEMvomitbush · Capparaceae - Atriplex eardleyae Aellen ATEAsmall saltbush · Chenopodiaceae
- Atriplex leucophylla (Moq.) D. Dietr. ATLE2beach saltbush · Chenopodiaceae
- Atriplex longitrichoma Stutz, G.L. Chu & S.C. Sand. ATLO3long-hair silverscale · Chenopodiaceae
- Atriplex minuticarpa Stutz & G.L. Chu ATMI4Tununk saltbush · Chenopodiaceae
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Atriplex oblongifolia Waldst. & Kit. ATOB2oblongleaf orache · Chenopodiaceae -
Atriplex pacifica A. Nelson ATPADavidson's saltbush · Chenopodiaceae -
Atriplex serenana A. Nelson ATSE2bractscale · Chenopodiaceae -
Atriplex serenana A. Nelson var. serenana ATSESbractscale · Chenopodiaceae - Atriplex tenuissima A. Nelson ATTEslender saltbush · Chenopodiaceae
- Atriplex wardii Standl. ATWA2Ward's saltbush · Chenopodiaceae
- Atriplex welshii C.A. Hanson ATWEWelsh's saltbush · Chenopodiaceae
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Aureolaria grandiflora (Benth.) Pennell var. grandiflora AUGRGlargeflower yellow false foxglove · Scrophulariaceae - Aurinia petraea (Ard.) Schur AUPE3goldentuft · Brassicaceae
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Avena hybrida Peterm. ex Rchb. AVHYoat · Poaceae -
Avena strigosa Schreb. AVST2black oats · Poaceae -
Avenula pubescens (Huds.) Dumort. AVPU2downy alpine oatgrass · Poaceae -
Ayenia glabra S. Watson AYGLsmooth ayenia · Sterculiaceae -
Azolla pinnata R. Br. AZPIfeathered mosquitofern · Azollaceae -
Azolla pinnata R. Br. ssp. asiatica R.M.K. Saunders & K. Fowler AZPIAfeathered mosquitofern · Azollaceae -
Baccharis dioica Vahl BADI3broombush false willow · Asteraceae - Baccharis douglasii DC. BADOsaltmarsh baccharis · Asteraceae
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Ballota nigra L. var. alba (L.) Sm. BANIAblack horehound · Lamiaceae -
Baltimora recta L. BARE2beautyhead · Asteraceae - Baptisia ×microphylla Nutt. (pro sp.) [perfoliata × tinctoria] BAMI3wild indigo · Fabaceae
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Barbula convoluta Hedw. BACO8convoluted barbula moss · Pottiaceae -
Barleria lupulina Lindl. BALU2hophead Philippine violet · Acanthaceae -
Batesimalva violacea (Rose) Fryxell BAVI5purple gaymallow · Malvaceae -
Bauhinia yunnanensis Franch. BAYUYunnan bauhinia · Fabaceae - Begonia foliosa Kunth BEFOfuchsia begonia · Begoniaceae
- Begonia foliosa Kunth var. miniata (Planch.) L.B. Sm. & B.G. Schub. BEFOMfuchsia begonia · Begoniaceae
- Begonia reniformis Dryand. BERE2grapeleaf begonia · Begoniaceae
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Beloglottis costaricensis (Rchb. f.) Schltr. BECO5Costa Rican lady's tresses · Orchidaceae - Berkheya heterophylla O. Hoffm. BEHEprickly gousblom · Asteraceae
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Betula platyphylla Sukaczev BEPL2Asian white birch · Betulaceae -
Betula pumila L. var. glabra Regel BEPUG2bog birch · Betulaceae -
Betula pumila L. var. renifolia Fernald BEPURbog birch · Betulaceae -
Betula uber (Ashe) Fernald BEUBVirginia roundleaf birch · Betulaceae - Betula ×sargentii Dugle [nana × pumila] BESA3birch · Betulaceae
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Bidens amplectens Sherff BIAM3kokolau · Asteraceae -
Bidens asymmetrica (Levl.) Sherff BIAS3Koolau Range beggarticks · Asteraceae -
Bidens campylotheca Sch. Bip. ssp. pentamera (Sherff) Ganders & Nagata BICAPviper beggarticks · Asteraceae -
Bidens campylotheca Sch. Bip. ssp. waihoiensis H. St. John BICAWWaihoi beggarticks · Asteraceae -
Bidens conjuncta Sherff BICO4bog beggarticks · Asteraceae -
Bidens cosmoides (A. Gray) Sherff BICO6cosmosflower beggarticks · Asteraceae -
Bidens forbesii Sherff BIFOcoastal bluff beggarticks · Asteraceae -
Bidens forbesii Sherff ssp. forbesii BIFOFcoastal bluff beggarticks · Asteraceae -
Bidens forbesii Sherff ssp. kahiliensis Ganders & Nagata BIFOKKahili beggarticks · Asteraceae -
Bidens gardneri Baker BIGAridge beggartick · Asteraceae