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Range and rarity
Rare (≤ 5 counties)
A broader rarity slice: taxa known from five counties or fewer nationwide. Includes single-county endemics plus the next-most-restricted species.
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Showing 1–50 of 9,281.
- Abelia ×grandiflora (Rovelli ex André) Rehder [chinensis × uniflora] ABGR4glossy abelia · Caprifoliaceae
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Abelmoschus moschatus Medik. ABMOmusk okra · Malvaceae -
Abies alba Mill. ABAL3silver fir · Pinaceae -
Abies balsamea (L.) Mill. var. phanerolepis Fernald ABBAPbalsam fir · Pinaceae -
Abies bracteata (D. Don) D. Don ex Poit. ABBRbristlecone fir · Pinaceae -
Abies firma Siebold & Zucc. ABFIMomi fir · Pinaceae -
Abietinella abietina (Hedw.) Fleisch. ABAB70abietinella moss · Thuidiaceae -
Abronia alpina Brandegee ABALRamshaw Meadows sand verbena · Nyctaginaceae -
Abronia ammophila Greene ABAM3Wyoming sand verbena · Nyctaginaceae -
Abronia argillosa S.L. Welsh & Goodrich ABARclay sand verbena · Nyctaginaceae -
Abronia bigelovii Heimerl ABBIGalisteo sand verbena · Nyctaginaceae -
Abronia bolackii N.D. Atwood, S.L. Welsh & K.D. Heil ABBOBolack's sand verbena · Nyctaginaceae -
Abronia macrocarpa L.A. Galloway ABMA5largefruit sand verbena · Nyctaginaceae - Abronia minor Standl. ABMI2little sand verbena · Nyctaginaceae
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Abronia nana S. Watson var. covillei (Heimerl) Munz ABNACCoville's dwarf sand verbena · Nyctaginaceae -
Abronia villosa S. Watson var. aurita (Abrams) Jeps. ABVIAdesert sand verbena · Nyctaginaceae -
Abutilon auritum (Wall. ex Link) Sweet ABAUAsian Indian mallow · Malvaceae -
Abutilon eremitopetalum Caum ABERhiddenpetal Indian mallow · Malvaceae -
Abutilon grandifolium (Willd.) Sweet ABGR3hairy Indian mallow · Malvaceae -
Abutilon hirtum (Lam.) Sweet ABHIFlorida Keys Indian mallow · Malvaceae -
Abutilon hypoleucum A. Gray ABHYwhiteleaf Indian mallow · Malvaceae -
Abutilon indicum (L.) Sweet ABIN3monkeybush · Malvaceae -
Abutilon indicum (L.) Sweet ssp. albescens (Miq.) Borss. Waalk. ABINAMalvaceae -
Abutilon menziesii Seem. ABME2ko'oloa 'ula · Malvaceae -
Abutilon palmeri A. Gray ABPAPalmer's Indian mallow · Malvaceae -
Abutilon permolle (Willd.) Sweet ABPEcoastal Indian mallow · Malvaceae -
Abutilon reventum S. Watson ABREyellowflower Indian mallow · Malvaceae -
Abutilon sandwicense (O. Deg.) Christoph. ABSA2greenflower Indian mallow · Malvaceae -
Abutilon thurberi A. Gray ABTH2Thurber's Indian mallow · Malvaceae - Abutilon trisulcatum (Jacq.) Urb. ABTRanglestem Indian mallow · Malvaceae
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Acacia confusa Merr. ACCOsmall Philippine acacia · Fabaceae -
Acacia cyclops A. Cunn. ex G. Don ACCY2coastal wattle · Fabaceae -
Acacia elata A. Cunn. ex Benth. ACELcedar wattle · Fabaceae -
Acacia koa A. Gray ACKOkoa · Fabaceae -
Acacia mearnsii De Wild. ACME80black wattle · Fabaceae -
Acacia parramattensis Tindale ACPA81South Wales wattle · Fabaceae -
Acacia pycnantha Benth. ACPY3golden wattle · Fabaceae -
Acacia saligna (Labill.) Wendl. f. ACSAorange wattle · Fabaceae -
Acacia verticillata (L'Hér.) Willd. ACVE2prickly Moses · Fabaceae - Acaciella leucothrix (Standl.) Britton & Rose ACLE10whitehair acacia · Fabaceae
- Acaciella shrevei Britton & Rose ACSH2Shreve's prairie acacia · Fabaceae
- Acaena exigua A. Gray ACEXliliwai · Rosaceae
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Acaena pallida (Kirk) Allen ACPA14pale biddy-biddy · Rosaceae -
Acalypha arvensis Poepp. ACAR16field copperleaf · Euphorbiaceae -
Acalypha californica Benth. ACCA3California copperleaf · Euphorbiaceae - Acalypha chamaedryfolia (Lam.) Müll. Arg. ACCH2bastard copperleaf · Euphorbiaceae
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Acalypha indica L. ACIN12Indian acalypha · Euphorbiaceae -
Acalypha mexicana Müll. Arg. ACME7Mexican copperleaf · Euphorbiaceae -
Acalypha poiretii Spreng. ACPOPoiret's copperleaf · Euphorbiaceae -
Acalypha wilkesiana Müll. Arg. ACWIWilkes' acalypha · Euphorbiaceae