GENUS |
ABBREVIATION |
COMPOSITION |
| Eastonara | Eas | Asctm x Gchls x V |
| Edeara | Edr | Arach x Phal x Ren x Vdps |
| Elearethusa | Elsa | Aret x Elo |
| Elecalthusa | Ecth | Aret x Cpg x Elo |
| Eleorchis | Elo | Natural |
| Elepogon | Elp | Elo x Cpg |
| Eliara | Eliara | Brs x Onc x Rdza |
| Elleanthus | Ellnth | Natural |
| Eltroplectis | Eltrpl | Natural |
| Eltroplectris | Eltrpl | Natural |
| Embreea | Emb | Natural |
| Encyclia | Encycl | Natural |
| Ephemerantha | Ephem | Natural |
| Epibarkiella | Epbkl | Bark x Epi x Ngl |
| Epiblastus | Epbls* | Natural |
| Epibrassonitis | Epbns | B x Epi x Soph |
| Epicatonia | Epctn | Bro x C x Epi |
| Epicattleya | Epc | C x Epi |
| Epidella | Epdla | Epi x Ngl |
| Epidendrum | Epi | Natural |
| Epidiacrium | Epdcm | Diacm x Epi |
| Epigeneium | Epig | Natural |
| Epiglottis | Epgl | Epi x Scgl |
| Epigoa | Epg | Dga x Epi |
| Epilaelia | Epl | Epi x L |
| Epilaeliocattleya | Eplc | C x Epi x L |
| Epilaeliopsis | Eplps | Epi x Lps |
| Epileptovola | Elva | B x Epi x Lpt |
| Epimicra | Emc | Epi x Ttma |
| Epiopsis | Eps | Ctps x Epi |
| Epipactis | Epcts | Natural |
| Epiphronitis | Ephs | Epi x Soph |
| Epistoma | Epstm | Amb x Epi |
| Epitonia | Eptn | Bro x Epi |
| Eria | Eria | Natural |
| Eriopsis | Erpss | Natural |
| Ernestara | Entra | Phal x Ren x Vdps |
| Erycina | Ercn | Natural |
| Eryidium | Erdm | Ercn x Onc |
| Erythrodes | Erythd* | Natural |
| Esmeralda | Esmrls | Natural |
| Estelaara | Esta | B x C x Epi x Ttma |
| Euanthe | Enth | Natural |
| Euclades | Eucl | Eupha x Oecl |
| Eulocymbidiella | Eucmla | Cymla x Eul |
| Eulophia | Eupha | Natural |
| Eulophidium | Elphd* | Natural |
| Eulophiella | Eul | Natural |
| Euryangis | Eugs | Aergs x Echn |
| Eurychone | Echn | Natural |
| Eurygraecum | Eugcm | Angcm x Echn |
| Eurynopsis | Eunps | Echn x Phal |
| Eurystyles | Erstls | Natural |
| Fergusonara | Ferg | B x C x L x Schom x Soph |
| Fernandezia | Frnndz | Natural |
| Fialaara | Fia | Bro x C x L x Lps |
| Flickingeria | Flkga | Natural |
| Fordyceara | Fdca | Bro x C x Lps x Ttma |
| Forgetara | Fgtra | Asp x Brs x Milt |
| Freedara | Frda | Ascgm x Ren x Vdps |
| Fujioara | Fjo | Asctm x Trgl x V |
| Fujiwarara | Fjw | B x C x Lps |