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 101–150 of 2,071.
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Anacamptodon splachnoides (Froel. ex Brid.) Brid. ANSP11anacamptodon moss · Fabroniaceae -
Anacyclus clavatus (Desf.) Pers. ANCL2whitebuttons · Asteraceae -
Anagallis monelli L. ANMO2flaxleaf pimpernel · Primulaceae -
Andreaea rothii F. Weber & D. Mohr ANRO7Roth's andreaea moss · Andreaeaceae -
Andreaea rupestris Hedw. ANRU7andreaea moss · Andreaeaceae -
Androsace chamaejasme Wulfen ssp. andersonii Hultén ANCHAAnderson's rockjasmine · Primulaceae -
Androsace maxima L. ANMA14greater rockjasmine · Primulaceae -
Androsace septentrionalis L. ssp. glandulosa (Wooton & Standl.) G.T. Robbins ANSEG2pygmyflower rockjasmine · Primulaceae -
Androsace septentrionalis L. ssp. subumbellata (A. Nelson) G.T. Robbins ANSES5pygmyflower rockjasmine · Primulaceae -
Anemia wrightii Baker ANWR4Wright's flowering fern · Anemiaceae -
Anemone multifida Poir. var. saxicola B. Boivin ANMUSred windflower · Ranunculaceae -
Anemone multifida Poir. var. stylosa (A. Nelson) Dutton & Keener ANMUS5Pacific anemone · Ranunculaceae -
Anemone piperi Britton ex Rydb. ANPIPiper's anemone · Ranunculaceae -
Aniseia martinicensis (Jacq.) Choisy ANMA4whitejacket · Convolvulaceae -
Aniseia martinicensis (Jacq.) Choisy var. nitens (Choisy) O'Donell ANMANwhitejacket · Convolvulaceae -
Anoda crenatiflora Ortega ANCRthicket anoda · Malvaceae -
Anoda thurberi A. Gray ANTH3Arizona anoda · Malvaceae -
Anomodon minor (Hedw.) Fürnr. ANMI9anomodon moss · Anomodontaceae -
Anomodon rugelii (Müll. Hal.) Keissl. ANRU5Rugel's anomodon moss · Anomodontaceae -
Anomodon viticulosus (Hedw.) Hook. & Taylor ANVI14anomodon moss · Anomodontaceae -
Antennaria aromatica Evert ANAR10scented pussytoes · Asteraceae -
Antennaria densifolia A.E. Porsild ANDE9denseleaf pussytoes · Asteraceae -
Antennaria dioica (L.) Gaertn. ANDI3stoloniferous pussytoes · Asteraceae -
Antennaria flagellaris (A. Gray) A. Gray ANFL2whip pussytoes · Asteraceae -
Antennaria howellii Greene ssp. howellii ANHOHHowell's pussytoes · Asteraceae -
Anthephora hermaphrodita (L.) Kuntze ANHE3oldfield grass · Poaceae -
Antiphytum floribundum (Torr.) A. Gray ANFL3Texas saucerflower · Boraginaceae -
Anulocaulis leiosolenus (Torr.) Standl. var. howardii Spellenb. & Wootten ANLEHsouthwestern ringstem · Nyctaginaceae -
Apiastrum angustifolium Nutt. APANmock parsley · Apiaceae -
Aptenia cordifolia (L. f.) Schwant. APCOheartleaf iceplant · Aizoaceae -
Aquilegia coerulea James var. alpina A. Nelson AQCOAColorado alpine columbine · Ranunculaceae -
Aquilegia jonesii Parry var. jonesii AQJOJJones' columbine · Ranunculaceae -
Arabis microphylla Nutt. var. macounii (S. Watson) Rollins ARMIMMacoun's rockcress · Brassicaceae -
Arabis murrayi G. Mulligan ARMU6Murray's rockcress · Brassicaceae -
Arabis pendulina Greene ARPErabbit ear rockcress · Brassicaceae -
Arabis pendulina Greene var. pendulina ARPEPrabbit ear rockcress · Brassicaceae - Arabis williamsii Rollins ARWIWind River rockcress · Brassicaceae
- Arabis williamsii Rollins var. saximontana (Rollins) Rollins ARWISCross Mountain rockcress · Brassicaceae
- Arachis hagenbeckii Harms ARHA10rhizoma peanut · Fabaceae
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Aralia chinensis L. ARCH12Chinese angelica tree · Araliaceae - Arbutus xalapensis Kunth ARXA80Texas madrone · Ericaceae
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Arceuthobium blumeri A. Nelson ARBL3southwestern white pine dwarf mistletoe · Viscaceae -
Arceuthobium campylopodum Engelm. ARCA3western dwarf mistletoe · Viscaceae -
Arceuthobium cyanocarpum (A. Nelson ex Rydb.) A. Nelson ARCY2limber pine dwarf mistletoe · Viscaceae -
Arceuthobium laricis (Piper) H. St. John ARLA11larch dwarf mistletoe · Viscaceae -
Arceuthobium tsugense (Rosend.) G.N. Jones ARTShemlock dwarf mistletoe · Viscaceae - Archidium ohioense Schimp. ex Müll. Hal. AROHOhio archidium moss · Archidiaceae
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Arctomecon californica Torr. & Frém. ARCA4California bearpoppy · Papaveraceae -
Arctotis stoechadifolia P.J. Bergius ARST2African daisy · Asteraceae -
Ardisia solanacea Roxb. ARSOChina-shrub · Myrsinaceae