| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| HECYG | Heuchera cylindrica Dougl. ex Hook. var. glabella (Torr. & Gray) Wheelock | beautiful alumroot | Saxifragaceae
|
| HECYO | Heuchera cylindrica Dougl. ex Hook. var. orbicularis (Rosendahl, Butters & Lakela) Calder & Savile | poker alumroot | Saxifragaceae
|
| HECYO2 | Heuchera cylindrica Dougl. ex Hook. var. ovalifolia (Nutt. ex Torr. & Gray) Wheelock | Heuchera cylindrica var. alpina | Saxifragaceae
|
| HECYS | Heuchera cylindrica Dougl. ex Hook. var. septentrionalis Rosendahl, Butters & Lakela | roundleaf alumroot | Saxifragaceae
|
| HECYS2 | Heuchera cylindrica Dougl. ex Hook. var. suksdorfii (Rydb.) Dorn | Heuchera cylindrica var. cylindrica | Saxifragaceae
|
| HECY2 | Heuchera cylindrica Dougl. ex Hook. | roundleaf alumroot | Saxifragaceae
|
| HEDI7 | Heuchera diversifolia Rydb. | Heuchera micrantha var. diversifolia | Saxifragaceae
|
| HEDU3 | Heuchera duranii Bacig. | hard alumroot | Saxifragaceae
|
| HEEA | Heuchera eastwoodiae Rosendahl, Butters & Lakela | Senator Mine alumroot | Saxifragaceae
|
| HEEL2 | Heuchera elegans Abrams | urnflower alumroot | Saxifragaceae
|
| HEFLF | Heuchera flabellifolia Rydb. var. flabellifolia | Bridger Mountain alumroot | Saxifragaceae
|
| HEFLS | Heuchera flabellifolia Rydb. var. subsecta Rosendahl, Butters & Lakela | Bridger Mountain alumroot | Saxifragaceae
|
| HEFL14 | Heuchera flabellifolia Rydb. | Bridger Mountain alumroot | Saxifragaceae
|
| HEGL13 | Heuchera glabella Torr. & Gray | Heuchera cylindrica var. glabella | Saxifragaceae
|
| HEGL5 | Heuchera glabra Willd. ex Roemer & J.A. Schultes | alpine heuchera | Saxifragaceae
|
| HEGL6 | Heuchera glomerulata Rosendahl, Butters & Lakela | Chiricahua Mountain alumroot | Saxifragaceae
|
| HEGRG | Heuchera grossulariifolia Rydb. var. grossulariifolia | gooseberryleaf alumroot | Saxifragaceae
|
| HEGRT | Heuchera grossulariifolia Rydb. var. tenuifolia (Wheelock) C.L. Hitchc. | gooseberryleaf alumroot | Saxifragaceae
|
| HEGR8 | Heuchera grossulariifolia Rydb. | gooseberryleaf alumroot | Saxifragaceae
|
| HEHA2 | Heuchera hallii Gray | Front Range alumroot | Saxifragaceae
|
| HEHI3 | Heuchera hirsuticaulis (Wheelock) Rydb. | Heuchera americana var. hirsuticaulis | Saxifragaceae
|
| HEHI4 | Heuchera hirsutissima Rosendahl, Butters & Lakela | shaggyhair alumroot | Saxifragaceae
|
| HEHI5 | Heuchera hispida Pursh | Heuchera americana var. hispida | Saxifragaceae
|
| HEHI10 | Heuchera hispida auct. non Pursh | Heuchera richardsonii | Saxifragaceae
|
| HELA18 | Heuchera lancipetala Rydb. | Heuchera americana var. americana | Saxifragaceae
|
| HELEP | Heuchera leptomeria Greene var. peninsularis Rosendahl, Butters & Lakela | Heuchera rubescens var. versicolor | Saxifragaceae
|
| HELE | Heuchera leptomeria Greene | Heuchera rubescens var. versicolor | Saxifragaceae
|
| HELOA | Heuchera longiflora Rydb. var. aceroides (Rydb.) Rosendahl, Butters & Lakela | Heuchera longiflora | Saxifragaceae
|
| HELO5 | Heuchera longiflora Rydb. | longflower alumroot | Saxifragaceae
|
| HEMA14 | Heuchera macrorhiza Small | Heuchera villosa var. villosa | Saxifragaceae
|
| HEMA4 | Heuchera maxima Greene | Jill of the rocks | Saxifragaceae
|
| HEME2 | Heuchera merriamii Eastw. | Merriam's alumroot | Saxifragaceae
|
| HEMID2 | Heuchera micrantha Dougl. ex Lindl. var. diversifolia (Rydb.) Rosendahl, Butters & Lakela | crevice alumroot | Saxifragaceae
|
| HEMIE2 | Heuchera micrantha Dougl. ex Lindl. var. erubescens (A. Braun & Bouch�) Rosendahl | crevice alumroot | Saxifragaceae
|
| HEMIH | Heuchera micrantha Dougl. ex Lindl. var. hartwegii (S. Wats. ex Wheelock) Rosendahl | Hartweg's alumroot | Saxifragaceae
|
| HEMIM4 | Heuchera micrantha Dougl. ex Lindl. var. macropetala B.G. Shipes & E. Wells | crevice alumroot | Saxifragaceae
|
| HEMIM2 | Heuchera micrantha Dougl. ex Lindl. var. micrantha | crevice alumroot | Saxifragaceae
|
| HEMIP | Heuchera micrantha Dougl. ex Lindl. var. pacifica Rosendahl, Butters & Lakela | Pacific alumroot | Saxifragaceae
|
| HEMI7 | Heuchera micrantha Dougl. ex Lindl. | crevice alumroot | Saxifragaceae
|
| HEMI8 | Heuchera missouriensis Rosendahl | Heuchera parvifolia var. parvifolia | Saxifragaceae
|
| HENI5 | Heuchera nivalis Rosendahl, Butters & Lakela | Heuchera parvifolia var. nivalis | Saxifragaceae
|
| HENO | Heuchera novomexicana Wheelock | New Mexico alumroot | Saxifragaceae
|
| HEOVO | Heuchera ovalifolia Nutt. ex Torr. & Gray var. orbicularis Rosendahl, Butters & Lakela | Heuchera cylindrica var. orbicularis | Saxifragaceae
|
| HEOVT | Heuchera ovalifolia Nutt. ex Torr. & Gray var. thompsonii Rosendahl, Butters & Lakela | Heuchera cylindrica var. alpina | Saxifragaceae
|
| HEOV | Heuchera ovalifolia Nutt. ex Torr. & Gray | Heuchera cylindrica var. alpina | Saxifragaceae
|
| HEPA9 | Heuchera parishii Rydb. | Mill Creek alumroot | Saxifragaceae
|
| HEPAP4 | Heuchera parviflora Bartl. var. parviflora | littleflower alumroot | Saxifragaceae
|
| HEPAP5 | Heuchera parviflora Bartl. var. puberula (Mackenzie & Bush) E. Wells | littleflower alumroot | Saxifragaceae
|
| HEPAR | Heuchera parviflora Bartl. var. rugelii (Shuttlw.) Rosendahl, Butters & Lakela | Heuchera parviflora var. parviflora | Saxifragaceae
|
| HEPA10 | Heuchera parviflora Bartl. | littleflower alumroot | Saxifragaceae
|
| HEPAA | Heuchera parvifolia Nutt. ex Torr. & Gray var. arizonica Rosendahl, Butters & Lakela | Arizona alumroot | Saxifragaceae
|
| HEPAD | Heuchera parvifolia Nutt. ex Torr. & Gray var. dissecta M.E. Jones | Heuchera flabellifolia var. flabellifolia | Saxifragaceae
|
| HEPAF | Heuchera parvifolia Nutt. ex Torr. & Gray var. flavescens (Rydb.) Rosendahl, Butters & Lakela | littleleaf alumroot | Saxifragaceae
|
| HEPAM | Heuchera parvifolia Nutt. ex Torr. & Gray var. major Rosendahl, Butters & Lakela | littleleaf alumroot | Saxifragaceae
|
| HEPAM2 | Heuchera parvifolia Nutt. ex Torr. & Gray var. microcarpa Rosendahl, Butters & Lakela | littleleaf alumroot | Saxifragaceae
|
| HEPAN | Heuchera parvifolia Nutt. ex Torr. & Gray var. nivalis (Rosendahl, Butters & Lakela) A.& D. L�ve & Kapoor | littleleaf alumroot | Saxifragaceae
|
| HEPAP6 | Heuchera parvifolia Nutt. ex Torr. & Gray var. parvifolia | littleleaf alumroot | Saxifragaceae
|
| HEPAU | Heuchera parvifolia Nutt. ex Torr. & Gray var. utahensis (Rydb.) Garrett | Utah alumroot | Saxifragaceae
|
| HEPA11 | Heuchera parvifolia Nutt. ex Torr. & Gray | littleleaf alumroot | Saxifragaceae
|
| HEPIH | Heuchera pilosissima Fisch. & C.A. Mey. var. hemisphaerica (Rydb.) Rosendahl | seaside alumroot | Saxifragaceae
|
| HEPIP | Heuchera pilosissima Fisch. & C.A. Mey. var. pilosissima | seaside alumroot | Saxifragaceae
|
| HEPI3 | Heuchera pilosissima Fisch. & C.A. Mey. | seaside alumroot | Saxifragaceae
|
| HEPR4 | Heuchera pringlei Rydb. | Heuchera merriamii | Saxifragaceae
|
| HEPU9 | Heuchera puberula Mackenzie & Bush | Heuchera parviflora var. puberula | Saxifragaceae
|
| HEPUB | Heuchera pubescens Pursh var. brachyandra Rosendahl, Butters & Lakela | Heuchera pubescens | Saxifragaceae
|
| HEPU7 | Heuchera pubescens Pursh | downy alumroot | Saxifragaceae
|
| HEPU10 | Heuchera pulchella Woot. & Standl. | Sandia Mountain alumroot | Saxifragaceae
|
| HERA6 | Heuchera racemosa S. Wats. | Elmera racemosa var. racemosa | Saxifragaceae
|
| HERIA | Heuchera richardsonii R. Br. var. affinis Rosendahl, Butters & Lakela | Heuchera richardsonii | Saxifragaceae
|
| HERIG | Heuchera richardsonii R. Br. var. grayana Rosendahl, Butters & Lakela | Heuchera richardsonii | Saxifragaceae
|
| HERIH | Heuchera richardsonii R. Br. var. hispidior Rosendahl, Butters & Lakela | Heuchera richardsonii | Saxifragaceae
|
| HERI | Heuchera richardsonii R. Br. | Richardson's alumroot | Saxifragaceae
|
| HERUA | Heuchera rubescens Torr. var. alpicola Jepson | pink alumroot | Saxifragaceae
|
| HERUG | Heuchera rubescens Torr. var. glandulosa Kellogg | pink alumroot | Saxifragaceae
|
| HERUP | Heuchera rubescens Torr. var. pachypoda (Greene) Rosendahl, Butters & Lakela | Heuchera rubescens var. alpicola | Saxifragaceae
|
| HERUR2 | Heuchera rubescens Torr. var. rubescens | pink alumroot | Saxifragaceae
|
| HERUR | Heuchera rubescens Torr. var. rydbergiana Rosendahl, Butters & Lakela | pink alumroot | Saxifragaceae
|
| HERUT | Heuchera rubescens Torr. var. truncata Rosendahl, Butters & Lakela | pink alumroot | Saxifragaceae
|
| HERUV | Heuchera rubescens Torr. var. versicolor (Greene) M.G. Stewart | pink alumroot | Saxifragaceae
|
| HERU | Heuchera rubescens Torr. | pink alumroot | Saxifragaceae
|
| HESAP | Heuchera sanguinea Engelm. var. pulchra (Rydb.) Rosendahl | coralbells | Saxifragaceae
|
| HESAS | Heuchera sanguinea Engelm. var. sanguinea | coralbells | Saxifragaceae
|
| HESA3 | Heuchera sanguinea Engelm. | coralbells | Saxifragaceae
|
| HESA8 | Heuchera saxicola E. Nels. | Heuchera cylindrica var. cylindrica | Saxifragaceae
|
| HESC5 | Heuchera scabra Rydb. | Heuchera longiflora | Saxifragaceae
|
| HESU9 | Heuchera suksdorfii Rydb. | Heuchera cylindrica var. cylindrica | Saxifragaceae
|
| HETE23 | Heuchera tenuifolia (Wheelock) Rydb. | Heuchera grossulariifolia var. tenuifolia | Saxifragaceae
|
| HEVEL | Heuchera versicolor Greene var. leptomeria (Greene) Kearney & Peebles | Heuchera rubescens var. versicolor | Saxifragaceae
|
| HEVE2 | Heuchera versicolor Greene | Heuchera rubescens var. versicolor | Saxifragaceae
|
| HEVIA | Heuchera villosa Michx. var. arkansana (Rydb.) E.B. Sm. | Arkansas alumroot | Saxifragaceae
|
| HEVII | Heuchera villosa Michx. var. intermedia Rosendahl, Butters & Lakela | Heuchera villosa var. villosa | Saxifragaceae
|
| HEVIM | Heuchera villosa Michx. var. macrorhiza (Small) Rosendahl, Butters & Lakela | Heuchera villosa var. villosa | Saxifragaceae
|
| HEVIV2 | Heuchera villosa Michx. var. villosa | hairy alumroot | Saxifragaceae
|
| HEVI2 | Heuchera villosa Michx. | hairy alumroot | Saxifragaceae
|
| HEWO | Heuchera wootonii Rydb. | White Mountain alumroot | Saxifragaceae
|
| HEUCH | Heuchera L. | alumroot | Saxifragaceae
|
| HEBE2 | Hevea benthamiana Muell. Arg. | Bentham's hevea | Euphorbiaceae
|
| HEBR8 | Hevea brasiliensis (Willd. ex Adr. Juss.) Muell. Arg. | rubber tree | Euphorbiaceae
|
| HEVEA | Hevea Aublet | hevea | Euphorbiaceae
|
| HEGR9 | Hexalectris grandiflora (A. Rich. & Gal.) L.O. Williams | largeflower crested coralroot | Orchidaceae
|
| HENI2 | Hexalectris nitida L.O. Williams | Glass Mountain crested coralroot | Orchidaceae
|