| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| HENAT | Hedeoma nana (Torr.) Briq. ssp. typica W.S. Stewart | Hedeoma nana ssp. nana | Lamiaceae
|
| HENA | Hedeoma nana (Torr.) Briq. | dwarf false pennyroyal | Lamiaceae
|
| HEOB | Hedeoma oblongifolia (Gray) Heller | oblongleaf false pennyroyal | Lamiaceae
|
| HEOV2 | Hedeoma ovata A. Nels. | Hedeoma drummondii | Lamiaceae
|
| HEPI4 | Hedeoma pilosa Irving | old blue false pennyroyal | Lamiaceae
|
| HEPIO | Hedeoma piperita Benth. var. oblongifolia Gray | Hedeoma oblongifolia | Lamiaceae
|
| HEPL | Hedeoma plicata Torr. | veiny false pennyroyal | Lamiaceae
|
| HEPU13 | Hedeoma pulchella Greene | Hedeoma costata var. pulchella | Lamiaceae
|
| HEPU12 | Hedeoma pulcherrima Woot. & Standl. | White Mountain false pennyroyal | Lamiaceae
|
| HEPU | Hedeoma pulegioides (L.) Pers. | American false pennyroyal | Lamiaceae
|
| HERER | Hedeoma reverchonii (Gray) Gray var. reverchonii | Reverchon's false pennyroyal | Lamiaceae
|
| HERES | Hedeoma reverchonii (Gray) Gray var. serpyllifolia (Small) Irving | Reverchon's false pennyroyal | Lamiaceae
|
| HERE3 | Hedeoma reverchonii (Gray) Gray | Reverchon's false pennyroyal | Lamiaceae
|
| HESA10 | Hedeoma sancta Small | Hedeoma reverchonii var. serpyllifolia | Lamiaceae
|
| HESE5 | Hedeoma serpyllifolia Small | Hedeoma reverchonii var. serpyllifolia | Lamiaceae
|
| HESE3 | Hedeoma serpylloides Torr. | Pogogyne serpylloides | Lamiaceae
|
| HETE22 | Hedeoma tenella Hemsl. | Hedeoma costata var. costata | Lamiaceae
|
| HETE20 | Hedeoma texana Cory | Rhododon ciliatus | Lamiaceae
|
| HETHO | Hedeoma thymoides Gray var. oblongifolia (Gray) Gray | Hedeoma oblongifolia | Lamiaceae
|
| HETH4 | Hedeoma thymoides Gray | Hedeoma nana ssp. nana | Lamiaceae
|
| HETO2 | Hedeoma todsenii Irving | Todsen's false pennyroyal | Lamiaceae
|
| HEDEO | Hedeoma Pers. | false pennyroyal | Lamiaceae
|
| HECA37 | Hedera canariensis Willd. | Canary ivy | Araliaceae
|
| HECO20 | Hedera colchica (K. Koch) K. Koch | colchis ivy | Araliaceae
|
| HEHEC | Hedera helix L. ssp. canariensis (Willd.) Cout. | Algerian ivy | Araliaceae
|
| HEHE | Hedera helix L. | English ivy | Araliaceae
|
| HEHI12 | Hedera hibernica (Kirchn.) Bean. | Atlantic Ivy | Araliaceae
|
| HEQU3 | Hedera quinquefolia L. | Parthenocissus quinquefolia | Vitaceae
|
| HEDER | Hedera L. | ivy | Araliaceae
|
| HEBA3 | Hedwigia balsamifera Sw. | Tetragastris balsamifera | Burseraceae
|
| HECI5 | Hedwigia ciliata (Hedw.) P. Beauv. | ciliate hedwigia moss | Hedwigiaceae
|
| HEDWI | Hedwigia P. Beauv. | hedwigia moss | Hedwigiaceae
|
| HECO11 | Hedychium coronarium Koenig | white garland-lily | Zingiberaceae
|
| HEFL5 | Hedychium flavescens Carey ex Roscoe | cream garland-lily | Zingiberaceae
|
| HEFL12 | Hedychium flavum auct. non Roxb. | Hedychium flavescens | Zingiberaceae
|
| HEGA | Hedychium gardnerianum Shepard ex Ker-Gawl. | Kahila garland-lily | Zingiberaceae
|
| HEDYC | Hedychium Koenig | garland-lily | Zingiberaceae
|
| HEAR | Hedyosmum arborescens Sw. | cigarbush | Chloranthaceae
|
| HEDYO | Hedyosmum Sw. | hedyosmum | Chloranthaceae
|
| HEACB | Hedyotis acerosa Gray var. bigelovii (Greenm.) W.H. Lewis | Houstonia acerosa | Rubiaceae
|
| HEACP | Hedyotis acerosa Gray var. polypremoides (Gray) W.H. Lewis | Houstonia acerosa | Rubiaceae
|
| HEAC5 | Hedyotis acerosa Gray | Houstonia acerosa | Rubiaceae
|
| HEAC3 | Hedyotis acuminata (Cham. & Schlecht.) Steud. | au | Rubiaceae
|
| HEAN14 | Hedyotis angulata Fosberg ex Shinners | smallflower starviolet | Rubiaceae
|
| HEANK | Hedyotis angusta Fosberg var. koolauensis Fosberg | Hedyotis schlechtendahliana var. schlechtendahliana | Rubiaceae
|
| HEANU | Hedyotis angusta Fosberg var. umbrosa Fosberg | Hedyotis schlechtendahliana var. schlechtendahliana | Rubiaceae
|
| HEAN10 | Hedyotis angusta Fosberg | Hedyotis schlechtendahliana var. schlechtendahliana | Rubiaceae
|
| HEAU3 | Hedyotis australis W.H. Lewis & D.M. Moore | Houstonia micrantha | Rubiaceae
|
| HEBO5 | Hedyotis boscii DC. | Oldenlandia boscii | Rubiaceae
|
| HEBU2 | Hedyotis butterwickiae (Terrell) Nesom | Butterwick's starviolet | Rubiaceae
|
| HECAM | Hedyotis caerulea (L.) Hook. var. minima (Beck) Fosberg | Houstonia pusilla | Rubiaceae
|
| HECAM2 | Hedyotis caerulea (L.) Hook. var. minor (Michx.) Torr. & Gray | Houstonia pusilla | Rubiaceae
|
| HECA19 | Hedyotis caerulea (L.) Hook. | Houstonia caerulea | Rubiaceae
|
| HECA20 | Hedyotis callitrichoides (Griseb.) W.H. Lewis | Oldenlandiopsis callitrichoides | Rubiaceae
|
| HECA21 | Hedyotis canadensis (Willd. ex Roemer & J.A. Schultes) Fosberg | Houstonia canadensis | Rubiaceae
|
| HECEL | Hedyotis centranthoides (Hook. & Arn.) Steud. var. laevis (Wawra) Fosberg | Hedyotis centranthoides | Rubiaceae
|
| HECE | Hedyotis centranthoides (Hook. & Arn.) Steud. | forest starviolet | Rubiaceae
|
| HECE4 | Hedyotis cervantesii Kunth | Houstonia wrightii | Rubiaceae
|
| HECO29 | Hedyotis commutata J.A. & J.H. Schultes | Oldenlandia lancifolia | Rubiaceae
|
| HECO13 | Hedyotis cookiana (Cham. & Schlecht.) Steud. | 'awiwi | Rubiaceae
|
| HECO14 | Hedyotis coriacea Sm. | kio'ele | Rubiaceae
|
| HECO22 | Hedyotis correllii W.H. Lewis | Houstonia correllii | Rubiaceae
|
| HECO15 | Hedyotis corymbosa (L.) Lam. | Oldenlandia corymbosa | Rubiaceae
|
| HECRM | Hedyotis crassifolia Raf. var. micrantha Shinners | Houstonia micrantha | Rubiaceae
|
| HECR9 | Hedyotis crassifolia Raf. | Houstonia pusilla | Rubiaceae
|
| HECR7 | Hedyotis croftiae (Britt. & Rusby) Shinners | Houstonia croftiae | Rubiaceae
|
| HEDEC | Hedyotis degeneri Fosberg var. coprosmifolia Fosberg | Waianae Range starviolet | Rubiaceae
|
| HEDED2 | Hedyotis degeneri Fosberg var. degeneri | Waianae Range starviolet | Rubiaceae
|
| HEDE3 | Hedyotis degeneri Fosberg | Waianae Range starviolet | Rubiaceae
|
| HEELE | Hedyotis elatior (Mann) Fosberg var. ensiformis (Fosberg) Fosberg | Hedyotis elatior | Rubiaceae
|
| HEELH | Hedyotis elatior (Mann) Fosberg var. herbacea (Levl.) Fosberg | Hedyotis elatior | Rubiaceae
|
| HEEL4 | Hedyotis elatior (Mann) Fosberg | 'uiwi | Rubiaceae
|
| HEFA7 | Hedyotis fasciculata Bertol. | Oldenlandia uniflora | Rubiaceae
|
| HEFLH | Hedyotis fluviatilis (Forbes) Fosberg var. hathewayi Fosberg | Hedyotis fluviatilis | Rubiaceae
|
| HEFLK | Hedyotis fluviatilis (Forbes) Fosberg var. kamapuaana (O. Deg.) Fosberg | Hedyotis fluviatilis | Rubiaceae
|
| HEFLK2 | Hedyotis fluviatilis (Forbes) Fosberg var. kauaiensis Fosberg | Hedyotis fluviatilis | Rubiaceae
|
| HEFL6 | Hedyotis fluviatilis (Forbes) Fosberg | kamapua'a | Rubiaceae
|
| HEFO | Hedyotis foggiana Fosberg | Kauai starviolet | Rubiaceae
|
| HEFO2 | Hedyotis foliosa (Hbd.) Fosberg | Haleakala starviolet | Rubiaceae
|
| HEFO3 | Hedyotis formosa (Hbd.) Fosberg | Maui starviolet | Rubiaceae
|
| HEFO5 | Hedyotis fosbergii W.L. Wagner & Herbst | Fosberg's starviolet | Rubiaceae
|
| HEGLH | Hedyotis glaucifolia (Gray) Fosberg var. helleri Fosberg | Hedyotis schlechtendahliana var. schlechtendahliana | Rubiaceae
|
| HEGLS | Hedyotis glaucifolia (Gray) Fosberg var. subimpressa Fosberg | Hedyotis schlechtendahliana var. schlechtendahliana | Rubiaceae
|
| HEGLW | Hedyotis glaucifolia (Gray) Fosberg var. waimeae (Wawra) Fosberg | Hedyotis schlechtendahliana var. schlechtendahliana | Rubiaceae
|
| HEGL9 | Hedyotis glaucifolia (Gray) Fosberg | Hedyotis schlechtendahliana var. schlechtendahliana | Rubiaceae
|
| HEGR17 | Hedyotis greenei (Gray) W.H. Lewis | Greene's starviolet | Rubiaceae
|
| HEGR11 | Hedyotis greenmanii Fosberg | Houstonia parviflora | Rubiaceae
|
| HEHA4 | Hedyotis halei Torr. & Gray | Pentodon pentandrus | Rubiaceae
|
| HEHI8 | Hedyotis hillebrandii (Fosberg) W.L. Wagner & Herbst | manono | Rubiaceae
|
| HEHU | Hedyotis humifusa Gray | Houstonia humifusa | Rubiaceae
|
| HEIN7 | Hedyotis intricata Fosberg | tangled starviolet | Rubiaceae
|
| HEKN | Hedyotis knudsenii (Hbd.) Fosberg | kokee starviolet | Rubiaceae
|
| HELA16 | Hedyotis lanceolata Poir. | Houstonia purpurea var. calycosa | Rubiaceae
|
| HELA17 | Hedyotis lancifolia Schumacher | Oldenlandia lancifolia | Rubiaceae
|
| HELI5 | Hedyotis littoralis (Hbd.) Fosberg | seacliff starviolet | Rubiaceae
|
| HELOC | Hedyotis longifolia (Gaertn.) Hook. var. ciliolata (Torr.) Mohlenbrock | Houstonia canadensis | Rubiaceae
|
| HELOT | Hedyotis longifolia (Gaertn.) Hook. var. tenuifolia (Nutt.) Torr. & Gray | Houstonia longifolia | Rubiaceae
|
| HELO7 | Hedyotis longifolia (Gaertn.) Hook. | Houstonia longifolia | Rubiaceae
|
| HEMAC | Hedyotis mannii Fosberg var. cuspidata Fosberg | Hedyotis mannii | Rubiaceae
|
| HEMAM | Hedyotis mannii Fosberg var. munroi Fosberg | Hedyotis mannii | Rubiaceae
|
| HEMAS | Hedyotis mannii Fosberg var. scaposa Fosberg | Hedyotis mannii | Rubiaceae
|