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 151–200 of 3,373.
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Aniseia martinicensis (Jacq.) Choisy ANMA4whitejacket · Convolvulaceae -
Aniseia martinicensis (Jacq.) Choisy var. nitens (Choisy) O'Donell ANMANwhitejacket · Convolvulaceae -
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 densifolia A.E. Porsild ANDE9denseleaf pussytoes · Asteraceae -
Antennaria dioica (L.) Gaertn. ANDI3stoloniferous pussytoes · Asteraceae -
Antennaria soliceps S.F. Blake ANSO2Charleston Mountain pussytoes · Asteraceae -
Anthemis austriaca Jacq. ANAU3Austrian chamomile · Asteraceae -
Anthephora hermaphrodita (L.) Kuntze ANHE3oldfield grass · Poaceae - Anthurium ×selloum K. Koch (pro sp.) [cordatum × crenatum] ANSE5laceleaf · Araceae
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Antidesma platyphyllum H. Mann var. hillebrandii Pax & K. Hoffm. ANPLH2Hillebrand's ha'a · Euphorbiaceae -
Anulocaulis leiosolenus (Torr.) Standl. var. howardii Spellenb. & Wootten ANLEHsouthwestern ringstem · Nyctaginaceae -
Aquilegia chrysantha A. Gray var. chrysantha AQCHC2golden columbine · Ranunculaceae -
Aquilegia chrysantha A. Gray var. rydbergii Munz AQCHRRydberg's golden columbine · Ranunculaceae - Aquilegia grahamii S.L. Welsh & Goodrich AQGRGrahm's columbine · Ranunculaceae
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Aquilegia laramiensis A. Nelson AQLALaramie columbine · Ranunculaceae - Aquilegia loriae S.L. Welsh & N.D. Atwood AQLO2Lori's columbine · Ranunculaceae
- Aquilegia scopulorum Tidestr. var. calcarea (M.E. Jones) Munz AQSCCUtah columbine · Ranunculaceae
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Arabis breweri S. Watson var. pecuniaria Rollins ARBRPBrewer's rockcress · Brassicaceae -
Arabis davidsonii Greene var. parva Rollins ARDAPDavidson's rockcress · Brassicaceae -
Arabis hirshbergiae S. Boyd ARHI9Cuyamaca rockcress · Brassicaceae -
Arabis johnstonii Munz ARJOJohnston's rockcress · Brassicaceae -
Arabis koehleri Howell var. koehleri ARKOKKoehler's rockcress · Brassicaceae -
Arabis microphylla Nutt. var. thompsonii Rollins ARMITThompson's rockcress · Brassicaceae -
Arabis murrayi G. Mulligan ARMU6Murray's rockcress · Brassicaceae -
Arabis parishii S. Watson ARPAdwarf rockcress · Brassicaceae -
Arabis pulchra M.E. Jones ex S. Watson var. duchesnensis Rollins ARPUDDuchesne rockcress · Brassicaceae - Arabis pusilla Rollins ARPU18Fremont County rockcress · Brassicaceae
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Arabis rollei Rollins ARRO11Klamath River rockcress · Brassicaceae - Arachis hagenbeckii Harms ARHA10rhizoma peanut · Fabaceae
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Aralia chinensis L. ARCH12Chinese angelica tree · Araliaceae -
Arbutus unedo L. ARUN4strawberry tree · Ericaceae -
Arceuthobium blumeri A. Nelson ARBL3southwestern white pine dwarf mistletoe · Viscaceae - Archidium ohioense Schimp. ex Müll. Hal. AROHOhio archidium moss · Archidiaceae
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Archontophoenix alexandrae (F. Muell.) H. Wendl. & Drude ARALAlexandra palm · Arecaceae -
Arctomecon humilis Coville ARHU3common bearpoppy · Papaveraceae -
Arctostaphylos auriculata Eastw. ARAUMt. Diablo manzanita · Ericaceae -
Arctostaphylos bakeri Eastw. ARBA4Baker's manzanita · Ericaceae -
Arctostaphylos bakeri Eastw. ssp. bakeri ARBABBaker's manzanita · Ericaceae -
Arctostaphylos bakeri Eastw. ssp. sublaevis P.V. Wells ARBASThe Cedars manzanita · Ericaceae -
Arctostaphylos catalinae P.V. Wells ARCA21Santa Catalina Island manzanita · Ericaceae -
Arctostaphylos confertiflora Eastw. ARCO13Santa Rosa Island manzanita · Ericaceae -
Arctostaphylos densiflora M.S. Baker ARDE2Vine Hill manzanita · Ericaceae -
Arctostaphylos edmundsii J.T. Howell AREDLittle Sur manzanita · Ericaceae - Arctostaphylos gabrielensis P.V. Wells ARGA4San Gabriel manzanita · Ericaceae
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Arctostaphylos glandulosa Eastw. ssp. crassifolia (Jeps.) P.V. Wells ARGLC4Del Mar manzanita · Ericaceae -
Arctostaphylos glandulosa Eastw. ssp. glaucomollis P.V. Wells ARGLG4Eastwood's manzanita · Ericaceae -
Arctostaphylos glutinosa Schreib. ARGL5Schreiber's manzanita · Ericaceae