Explore / Range and rarity / Rare (≤ 5 counties)
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.
- Matching taxa
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Showing 4,501–4,550 of 9,281.
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Hilaria belangeri (Steud.) Nash var. longifolia (Vasey) Hitchc. HIBELlongleaf curly-mesquite · Poaceae -
Hilaria swallenii Cory HISWSwallen's curly-mesquite · Poaceae -
Hillebrandia sandwicensis Oliv. HISAaka'aka'aka · Begoniaceae -
Hippobroma longiflora (L.) G. Don HILO3madamfate · Campanulaceae -
Hippocratea volubilis L. HIVOmedicine vine · Hippocrateaceae -
Hippocrepis comosa L. HICO3horseshoe vetch · Fabaceae -
Hippomane mancinella L. HIMA2manchineel · Euphorbiaceae -
Hoffmannseggia microphylla Torr. HOMI5wand holdback · Fabaceae -
Hoffmannseggia repens (Eastw.) Cockerell HOREcreeping nicker · Fabaceae -
Hoffmannseggia tenella Tharp & L.O. Williams HOTEslender rushpea · Fabaceae -
Hoheria populnea A. Cunn. HOPO5lacebark · Malvaceae -
Hoita strobilina (Hook. & Arn.) Rydb. HOST3Loma prieta · Fabaceae -
Holacantha stewartii C.H. Mull. HOST2Stewart's crucifixionthorn · Simaroubaceae -
Holmgrenanthe petrophila (Coville & Morton) Elisens HOPE2rocklady · Scrophulariaceae -
Holmskioldia sanguinea Retz. HOSA2Chinese hatplant · Verbenaceae -
Holocarpha macradenia (DC.) Greene HOMASanta Cruz tarplant · Asteraceae -
Holocarpha obconica (J.C. Clausen & D.D. Keck) D.D. Keck ssp. autumnalis D.D. Keck HOOBASan Joaquin tarweed · Asteraceae -
Holocarpha virgata (A. Gray) D.D. Keck ssp. elongata D.D. Keck HOVIEwand tarbush · Asteraceae -
Homomallium adnatum (Hedw.) Broth. HOADhomomallium moss · Hypnaceae -
Honckenya peploides (L.) Ehrh. ssp. diffusa (Hornem.) Hultén HOPEDseaside sandplant · Caryophyllaceae -
Hordeum marinum Huds. ssp. marinum HOMAMseaside barley · Poaceae -
Horkelia bolanderi A. Gray HOBO2border horkelia · Rosaceae -
Horkelia californica Cham. & Schltdl. ssp. californica HOCACCalifornia horkelia · Rosaceae -
Horkelia clevelandii (Greene) Rydb. HOCLCleveland's horkelia · Rosaceae -
Horkelia congesta Douglas ex Hook. ssp. nemorosa D.D. Keck HOCONSierra horkelia · Rosaceae -
Horkelia daucifolia (Greene) Rydb. ssp. latior D.D. Keck HODALcarrotleaf horkelia · Rosaceae -
Horkelia fusca Lindl. ssp. filicoides (Crum) D.D. Keck HOFUFpinewoods horkelia · Rosaceae - Horkelia fusca Lindl. ssp. pseudocapitata (Rydb. ex Howell) D.D. Keck HOFUP3littlehead horkelia · Rosaceae
- Horkelia fusca Lindl. ssp. tenella (S. Watson) D.D. Keck HOFUTpinewoods horkelia · Rosaceae
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Horkelia hendersonii Howell HOHE2Henderson's horkelia · Rosaceae -
Horkelia hispidula Rydb. HOHIWhite Mountain horkelia · Rosaceae -
Horkelia marinensis (Elmer) Crum ex D.D. Keck HOMA3Point Reyes horkelia · Rosaceae -
Horkelia parryi Greene HOPA2Parry horkelia · Rosaceae -
Horkelia rydbergii Elmer HORYRydberg's horkelia · Rosaceae -
Horkelia tenuiloba (Torr.) A. Gray HOTE2Santa Rosa horkelia · Rosaceae -
Horkelia truncata Rydb. HOTR2Ramona horkelia · Rosaceae -
Horkelia tularensis (J.T. Howell) Munz HOTUKern Plateau horkelia · Rosaceae -
Horkelia wilderae Parish HOWIBarton Flats horkelia · Rosaceae -
Horkelia yadonii Ertter HOYA2Santa Lucia horkelia · Rosaceae -
Horkeliella congdonis (Rydb.) Rydb. HOCO5Congdon's false horkelia · Rosaceae -
Horkeliella purpurascens (S. Watson) Rydb. HOPU8purple false horkelia · Rosaceae -
Horsfordia alata (S. Watson) A. Gray HOALpink velvetmallow · Malvaceae -
Hosta plantaginea (Lam.) Asch. HOPL2fragrant plantain lily · Liliaceae -
Houstonia acerosa (A. Gray) A. Gray ex Benth. & Hook. f. var. polypremoides (A. Gray) Terrell HOACP2needleleaf bluet · Rubiaceae - Houstonia correllii (W.H. Lewis) Terrell HOCO2Correll's bluet · Rubiaceae
- Houstonia croftiae Britton & Rusby HOCRCroft's bluet · Rubiaceae
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Houstonia ouachitana (E.B. Sm.) Terrell HOOUOuachita bluet · Rubiaceae -
Houstonia purpurea L. var. montana (Small) Terrell HOPUMVenus' pride · Rubiaceae -
Houttuynia cordata Thunb. HOCO3chameleon · Saururaceae -
Hovenia dulcis Thunb. HODU2Japanese raisintree · Rhamnaceae