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 1–50 of 2,062.
- Abelia ×grandiflora (Rovelli ex André) Rehder [chinensis × uniflora] ABGR4glossy abelia · Caprifoliaceae
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Abies alba Mill. ABAL3silver fir · Pinaceae -
Abies amabilis (Douglas ex Loudon) Douglas ex Forbes ABAMPacific silver fir · Pinaceae -
Abies magnifica A. Murray bis ABMACalifornia red fir · Pinaceae -
Abietinella abietina (Hedw.) Fleisch. ABAB70abietinella moss · Thuidiaceae -
Abutilon reventum S. Watson ABREyellowflower Indian mallow · Malvaceae -
Abutilon thurberi A. Gray ABTH2Thurber's Indian mallow · Malvaceae -
Acalypha californica Benth. ACCA3California copperleaf · Euphorbiaceae -
Acalypha mexicana Müll. Arg. ACME7Mexican copperleaf · Euphorbiaceae -
Acalypha poiretii Spreng. ACPOPoiret's copperleaf · Euphorbiaceae -
Acaulon muticum (Hedw.) Müll. Hal. ACMU5acaulon moss · Pottiaceae -
Acer glabrum Torr. var. diffusum (Greene) Smiley ACGLD3Rocky Mountain maple · Aceraceae -
Achillea ageratum L. ACAG3sweet-Nancy · Asteraceae - Achnatherum lobatum (Swallen) Barkworth ACLO7littleawn needlegrass · Poaceae
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Achnatherum parishii (Vasey) Barkworth ACPA13Parish's needlegrass · Poaceae -
Achnatherum parishii (Vasey) Barkworth var. parishii ACPAPParish's needlegrass · Poaceae -
Achnatherum pinetorum (M.E. Jones) Barkworth ACPI2pine needlegrass · Poaceae - Acmella pilosa R.K. Jansen ACPI4hairy spotflower · Asteraceae
- Aconitum infectum Greene ACIN2Arizona monkshood · Ranunculaceae
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Acrocomia totai Mart. ACTO5grugru palm · Arecaceae -
Actinidia chinensis Planch. ACCH5kiwi · Actinidiaceae -
Actinidia chinensis Planch. var. deliciosa (A. Chev.) A. Chev. ACCHDkiwi · Actinidiaceae -
Actinidia polygama (Siebold & Zucc.) Maxim. ACPO9silver vine · Actinidiaceae -
Adenophyllum cooperi (A. Gray) Strother ADCO2Cooper's dogweed · Asteraceae -
Adenophyllum wrightii A. Gray ADWRWright's dogweed · Asteraceae -
Adiantum anceps Maxon & Morton ADAN2double edge maidenhair · Pteridaceae -
Adiantum caudatum L. ADCA3tailed maidenhair · Pteridaceae -
Adiantum hispidulum Sw. ADHIrough maidenhair · Pteridaceae -
Adiantum melanoleucum Willd. ADMEfragrant maidenhair · Pteridaceae -
Adiantum trapeziforme L. ADTR4diamond maidenhair · Pteridaceae -
Adiantum villosum L. ADVIwoolly maidenhair · Pteridaceae -
Adiantum viridimontanum Paris ADVI3Green Mountain maidenhair · Pteridaceae -
Adonis vernalis L. ADVEspring pheasant's eye · Ranunculaceae -
Aegilops crassa Boiss. AECRPersian goatgrass · Poaceae -
Aegilops geniculata Roth AEGEovate goatgrass · Poaceae -
Aegilops neglecta Req. ex Bertol. AENE2three-awned goatgrass · Poaceae -
Aegilops tauschii Coss. AETA2Tausch's goatgrass · Poaceae - Aesculus ×arnoldiana Sarg. [glabra × hybrida] AEAR5Arnold buckeye · Hippocastanaceae
- Agalinis caddoensis Pennell AGCA8Caddo false foxglove · Scrophulariaceae
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Agalinis flexicaulis Hays AGFL2Hampton false foxglove · Scrophulariaceae -
Agastache micrantha (A. Gray) Wooton & Standl. AGMIwhite giant hyssop · Lamiaceae -
Agastache pallida (Lindl.) Cory AGPA11pale giant hyssop · Lamiaceae -
Agastache pallidiflora (A. Heller) Rydb. ssp. pallidiflora var. greenei (Briq.) R.W. Sanders AGPAG4Bill Williams Mountain giant hyssop · Lamiaceae -
Agave americana L. ssp. americana var. americana AGAMA2American century plant · Agavaceae -
Agave americana L. ssp. americana var. expansa (Jacobi) Gentry AGAMEAmerican century plant · Agavaceae -
Agave desmettiana Jacobi AGDE4dwarf century plant · Agavaceae -
Agave phillipsiana W.C. Hodgson AGPHGrand Canyon century plant · Agavaceae -
Agave schottii Engelm. var. treleasei (Toumey) Kearney & Peebles AGSCTTrelease's century plant · Agavaceae - Agave ×ajoensis W.C. Hodgson [deserti × schottii] AGAJagave · Agavaceae
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Ageratina lemmonii (B.L. Rob.) R.M. King & H. Rob. AGLE3Lemmon's snakeroot · Asteraceae