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 4,551–4,600 of 9,281.
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Howellanthus dalesianus (J.T. Howell) Walden & R.Patt. HODA2Scott Mountain phacelia · Hydrophyllaceae -
Hudsonia montana Nutt. HUMOmountain goldenheather · Cistaceae -
Hulsea brevifolia A. Gray HUBRshortleaf alpinegold · Asteraceae -
Hulsea californica Torr. & A. Gray HUCASan Diego alpinegold · Asteraceae -
Hulsea mexicana Rydb. HUMEMexican alpinegold · Asteraceae -
Hulsea vestita A. Gray ssp. callicarpha (H.M. Hall) Wilken HUVECpumice alpinegold · Asteraceae - Hulsea vestita A. Gray ssp. gabrielensis Wilken HUVEGpumice alpinegold · Asteraceae
- Hulsea vestita A. Gray ssp. inyoensis (D.D. Keck) Wilken HUVEIpumice alpinegold · Asteraceae
- Hulsea vestita A. Gray ssp. parryi (A. Gray) Wilken HUVEPParry's alpinegold · Asteraceae
- Hulsea vestita A. Gray ssp. pygmaea (A. Gray) Wilken HUVEP2pygmy alpinegold · Asteraceae
- Hulsea vestita A. Gray ssp. vestita HUVEVpumice alpinegold · Asteraceae
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Hunnemannia fumariifolia Sweet HUFUMexican tulip poppy · Papaveraceae -
Hunzikeria texana (Torr.) D'Arcy HUTE2Texas cupflower · Solanaceae -
Huperzia dichotoma (Jacq.) Trevis. HUDIhanging clubmoss · Lycopodiaceae -
Huperzia selago (L.) Bernh. ex Schrank & Mart. var. densa Trevis. HUSEDfir clubmoss · Lycopodiaceae - Huperzia ×buttersii (Abbe) Kartesz & Gandhi [lucidula × selago] HUBUclubmoss · Lycopodiaceae
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Hura crepitans L. HUCRsandbox tree · Euphorbiaceae -
Hyacinthoides hispanica (Mill.) Rothm. HYHI5Hispanic hyacinthoides · Liliaceae - Hyacinthoides ×massartiana Geerinck [hispanica × non-scripta] HYMA4hyacinthoides · Liliaceae
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Hybanthus attenuatus (Humb. & Bonpl. ex Schult.) Schulze-Menz HYATwestern greenviolet · Violaceae -
Hybanthus linearifolius (Vahl) Urb. HYLI3chancleta · Violaceae -
Hybanthus parviflorus (L. f.) Baill. HYPA15violetilla · Violaceae -
Hydrocharis morsus-ranae L. HYMO6common frogbit · Hydrocharitaceae -
Hydrocotyle bowlesioides Mathias & Constance HYBO3largeleaf marshpennywort · Apiaceae -
Hydrocotyle moschata G. Forst. HYMO4musky marshpennywort · Apiaceae -
Hydrocotyle verticillata Thunb. var. fetherstoniana (Jennings) Mathias HYVEFwhorled marshpennywort · Apiaceae -
Hydrolea spinosa L. HYSPspiny false fiddleleaf · Hydrophyllaceae -
Hygrophila corymbosa (Blume) Lindau HYCO8starhorn · Acanthaceae -
Hygrophila difformis (L. f.) Blume HYDI7Water-Wisteria · Acanthaceae -
Hylocomium splendens (Hedw.) Schimp. HYSP70splendid feather moss · Hylocomiaceae - Hymenocallis caribaea (L.) Herb. HYCA19Caribbean spiderlily · Liliaceae
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Hymenocallis franklinensis G. Lom. Sm., L.C. Anderson & Flory HYFR4Franklin spiderlily · Liliaceae -
Hymenocallis gholsonii G. Lom. Sm. & Garland HYGHGholson's spider-lily · Liliaceae -
Hymenocallis godfreyi G. Lom. Sm. & Darst HYGO2Godfrey's spiderlily · Liliaceae -
Hymenocallis henryae Traub HYHE2Henry's spiderlily · Liliaceae - Hymenocallis henryae Traub var. glaucifolia J.N. Henry & G. Lom. Sm. HYHEGHenry's spiderlily · Liliaceae
- Hymenocallis henryae Traub var. henryae HYHEHHenry's spiderlily · Liliaceae
- Hymenocallis puntagordensis Traub HYPU10Punta Gorda spiderlily · Liliaceae
- Hymenoclea sandersonii (S.L. Welsh) N.H. Holmgren HYSA2Sanderson's burrobrush · Asteraceae
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Hymenopappus filifolius Hook. var. eriopodus (A. Nelson) B.L. Turner HYFIEfineleaf hymenopappus · Asteraceae - Hymenopappus filifolius Hook. var. idahoensis B.L. Turner HYFIIIdaho hymenopappus · Asteraceae
- Hymenopappus filifolius Hook. var. tomentosus (Rydb.) B.L. Turner HYFITfinehair hymenopappus · Asteraceae
- Hymenopappus radiatus Rose HYRA2ray hymenopappus · Asteraceae
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Hymenophyllum tunbrigense (L.) Sm. HYTU2Tunbridge filmy fern · Hymenophyllaceae -
Hymenophyllum wrightii Bosch HYWR2Wright's filmy fern · Hymenophyllaceae -
Hymenoxys ambigens (S.F. Blake) Bierner HYAM8Pinaleno Mountain rubberweed · Asteraceae - Hymenoxys ambigens (S.F. Blake) Bierner var. ambigens HYAMAPinaleno Mountain rubberweed · Asteraceae
- Hymenoxys ambigens (S.F. Blake) Bierner var. floribunda (A. Gray) W.L. Wagner HYAMFApache Passe rubberweed · Asteraceae
- Hymenoxys ambigens (S.F. Blake) Bierner var. neomexicana W.L. Wagner HYAMNPinaleno Mountain rubberweed · Asteraceae
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Hymenoxys brachyactis Wooton & Standl. HYBR7East View rubberweed · Asteraceae