| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ECCO3 | Echinodorus cordifolius (L.) Griseb. | creeping burrhead | Alismataceae
|
| ECFL4 | Echinodorus floridanus Haynes & Burkhalter | | Alismataceae
|
| ECPA6 | Echinodorus parvulus Engelm. | Echinodorus tenellus | Alismataceae
|
| ECRA2 | Echinodorus radicans (Nutt.) Engelm. | Echinodorus cordifolius | Alismataceae
|
| ECRA | Echinodorus ranunculoides (L.) Engelm. | Baldellia ranunculoides | Alismataceae
|
| ECROL | Echinodorus rostratus (Nutt.) Engelm. ex Gray var. lanceolatus Engelm. ex S. Wats. & Coult. | Echinodorus berteroi | Alismataceae
|
| ECRO | Echinodorus rostratus (Nutt.) Engelm. ex Gray | Echinodorus berteroi | Alismataceae
|
| ECTEL | Echinodorus tenellus (Mart.) Buch. var. latifolius (Seub.) Fassett | Echinodorus tenellus | Alismataceae
|
| ECTEP | Echinodorus tenellus (Mart.) Buch. var. parvulus (Engelm.) Fassett | Echinodorus tenellus | Alismataceae
|
| ECTE2 | Echinodorus tenellus (Mart.) Buch. | mudbabies | Alismataceae
|
| ECHIN6 | Echinodorus L.C. Rich. ex Engelm. | burrhead | Alismataceae
|
| ECAC2 | Echinomastus acunensis W.T. Marsh. | Sclerocactus erectocentrus | Cactaceae
|
| ECERA | Echinomastus erectocentrus (Coult.) Britt. & Rose var. acunensis (W.T. Marsh.) H. Bravo | Sclerocactus erectocentrus | Cactaceae
|
| ECER2 | Echinomastus erectocentrus (Coult.) Britt. & Rose | Sclerocactus erectocentrus | Cactaceae
|
| ECIND2 | Echinomastus intertextus (Engelm.) Britt. & Rose var. dasyacanthus (Engelm.) Backeberg | Sclerocactus intertextus var. dasyacanthus | Cactaceae
|
| ECIN2 | Echinomastus intertextus (Engelm.) Britt. & Rose | Sclerocactus intertextus var. intertextus | Cactaceae
|
| ECJO3 | Echinomastus johnsonii (Parry ex Engelm.) E.M. Baxter | Sclerocactus johnsonii | Cactaceae
|
| ECMA2 | Echinomastus mariposensis Hester | Sclerocactus mariposensis | Cactaceae
|
| ECWA3 | Echinomastus warnockii (L. Benson) Glass & Foster | Sclerocactus warnockii | Cactaceae
|
| ECHO2 | Echinopanax horridus (Sm.) Dcne. & Planch. ex H.A.T. Harms | Oplopanax horridus | Araliaceae
|
| ECCO6 | Echinopepon coulteri (Gray) Rose | Coulter's balsam apple | Cucurbitaceae
|
| ECWR | Echinopepon wrightii (Gray) S. Wats. | wild balsam apple | Cucurbitaceae
|
| ECHIN7 | Echinopepon Naud. | balsam apple | Cucurbitaceae
|
| ECIN4 | Echinoplaca intercedens Vezda | | Gomphillaceae
|
| ECPE4 | Echinoplaca pellucida (Mull. Arg.) R. Sant. | | Gomphillaceae
|
| ECHIN9 | Echinoplaca Fee | echinoplaca | Gomphillaceae
|
| ECCO9 | Echinops commutatus Juratzka | Echinops exaltatus | Asteraceae
|
| ECEX | Echinops exaltatus Schrad. | tall globethistle | Asteraceae
|
| ECFR2 | Echinops fruticosus L. | Rolandra fruticosa | Asteraceae
|
| ECRIR | Echinops rito L. ssp. ruthenicus (Bieb.) Nyman | southern globethistle | Asteraceae
|
| ECRI | Echinops rito L. | southern globethistle | Asteraceae
|
| ECRU3 | Echinops ruthenicus Bieb. | Echinops rito ssp. ruthenicus | Asteraceae
|
| ECSP | Echinops sphaerocephalus L. | great globethistle | Asteraceae
|
| ECHIN8 | Echinops L. | globethistle | Asteraceae
|
| ECHY | Echinopsilon hyssopifolius (Pallas) Moq. | Bassia hyssopifolia | Chenopodiaceae
|
| ECCA6 | Echinopsis candicans (Gillies ex Salm-Dyck) F. A. C. Weber ex D. R. Hunt | | Cactaceae
|
| ECPA8 | Echinopsis pasacana (F.A.C.Weber) Friedrich & G.D.Rowley | | Cactaceae
|
| ECRO3 | Echinopsis rojasii Cardenas | | Cactaceae
|
| ECTU4 | Echinopsis turbinata Zuccagni | | Cactaceae
|
| ECHIN11 | Echinopsis Zuccagni | echinopsis | Cactaceae
|
| ECRE4 | Echinothecium reticulatum Zopf | | Capnodiaceae
|
| ECHIN10 | Echinothecium Zopf | echinothecium | Capnodiaceae
|
| ECAG | Echites agglutinata Jacq. | Prestonia agglutinata | Apocynaceae
|
| ECEC | Echites echites (L.) Britt. ex Small | Echites umbellata | Apocynaceae
|
| ECUM | Echites umbellata Jacq. | devil's potato | Apocynaceae
|
| ECHIT | Echites P. Br. | echites | Apocynaceae
|
| ECAU | Echium australe Lam. | Echium creticum | Boraginaceae
|
| ECCA5 | Echium candicans L. f. | pride of Madeira | Boraginaceae
|
| ECCO10 | Echium coincyanum Lacaita | smallstamen vipersbugloss | Boraginaceae
|
| ECCR3 | Echium creticum L. | Cretan vipersbugloss | Boraginaceae
|
| ECFA3 | Echium fastuosum auct. non Ait. | Echium candicans | Boraginaceae
|
| ECIT | Echium italicum L. | Italian vipersbugloss | Boraginaceae
|
| ECLY | Echium lycopsis L. p.p. | Echium plantagineum | Boraginaceae
|
| ECME4 | Echium menziesii Lehm. | Amsinckia menziesii var. menziesii | Boraginaceae
|
| ECPI2 | Echium pininana Webb & Berthel. | pine echium | Boraginaceae
|
| ECPL | Echium plantagineum L. | salvation jane | Boraginaceae
|
| ECPU2 | Echium pustulatum Sibthorp & Sm. | bluedevil | Boraginaceae
|
| ECVUP | Echium vulgare L. var. pustulatum (Sibthorp & Sm.) Coincy | Echium pustulatum | Boraginaceae
|
| ECVU | Echium vulgare L. | common vipersbugloss | Boraginaceae
|
| ECHIU | Echium L. | vipersbugloss | Boraginaceae
|
| ECAL | Eclipta alba (L.) Hassk. | Eclipta prostrata | Asteraceae
|
| ECER3 | Eclipta erecta L. | Eclipta prostrata | Asteraceae
|
| ECPR | Eclipta prostrata (L.) L. | false daisy | Asteraceae
|
| ECLIP | Eclipta L. | eclipta | Asteraceae
|
| ECAL4 | Ectosperma alexandrae Swallen | Swallenia alexandrae | Poaceae
|
| ECCA3 | Ectropothecium caloosiense (Aust.) Britt. | Vesicularia vesicularis | Hypnaceae
|
| EDGO | Eddya gossypina Woot. & Standl. | Tiquilia gossypina | Boraginaceae
|
| EDHI | Eddya hispidissima Torr. & Gray | Tiquilia hispidissima | Boraginaceae
|
| EDCH | Edgeworthia chrysantha Lindl. | Edgeworthia papyrifera | Thymelaeaceae
|
| EDPA | Edgeworthia papyrifera Sieb. & Zucc. | oriental paperbush | Thymelaeaceae
|
| EDTO | Edgeworthia tomentosa Nakai | Edgeworthia papyrifera | Thymelaeaceae
|
| EDGEW | Edgeworthia Meisn. | paperbush | Thymelaeaceae
|
| EDPU | Edisonia pubiflora (Dcne.) Small | Matelea pubiflora | Asclepiadaceae
|
| EDGR | Edithcolea grandis N.E. Br. | Persian carpet flower | Asclepiadaceae
|
| EDITH | Edithcolea N.E. Br. | Persian carpet flower | Asclepiadaceae
|
| EDCO | Edrudia constipans (Nyl.) W. P. Jordan | | Lecanoraceae
|
| EDRUD | Edrudia W. P. Jordan | edrudia | Lecanoraceae
|
| EDCA | Edwinia californica Small | Jamesia americana var. rosea | Hydrangeaceae
|
| EGDE | Egeria densa Planch. | Brazilian waterweed | Hydrocharitaceae
|
| EGERI | Egeria Planch. | egeria | Hydrocharitaceae
|
| EGBU | Eggersia buxifolia Hook. f. | Neea buxifolia | Nyctaginaceae
|
| EGPR | Egletes prostrata (Sw.) Kuntze | prostrate tropic daisy | Asteraceae
|
| EGVI | Egletes viscosa (L.) Less. | erect tropical daisy | Asteraceae
|
| EGLET | Egletes Cass. | tropic daisy | Asteraceae
|
| EHCH | Ehrendorferia chrysantha (Hook. & Arn.) Rylander | golden eardrops | Fumariaceae
|
| EHOC | Ehrendorferia ochroleuca (Englem.) Fukuhara | yellow bleeding heart | Fumariaceae
|
| EHREN | Ehrendorferia Fukuhara & Lid�n | golden eardrops | Fumariaceae
|
| EHAN | Ehretia anacua (Teran & Berl.) I.M. Johnston | knockaway | Boraginaceae
|
| EHRET | Ehretia P. Br. | ehretia | Boraginaceae
|
| EHCA | Ehrharta calycina Sm. | perennial veldtgrass | Poaceae
|
| EHER | Ehrharta erecta Lam. | panic veldtgrass | Poaceae
|
| EHLO3 | Ehrharta longiflora Sm. | longflowered veldtgrass | Poaceae
|
| EHST | Ehrharta stipoides Labill. | weeping grass | Poaceae
|
| EHRHA | Ehrharta Thunb. | veldtgrass | Poaceae
|
| EIAZ2 | Eichhornia azurea (Sw.) Kunth | anchored water hyacinth | Pontederiaceae
|
| EICR | Eichhornia crassipes (Mart.) Solms | common water hyacinth | Pontederiaceae
|
| EIDI | Eichhornia diversifolia (Vahl) Urban | variableleaf water hyacinth | Pontederiaceae
|
| EIPA | Eichhornia paniculata (Spreng.) Solms | Brazilian water hyacinth | Pontederiaceae
|
| EISP | Eichhornia speciosa Kunth | Eichhornia crassipes | Pontederiaceae
|
| EICHH | Eichhornia Kunth | water hyacinth | Pontederiaceae
|
| EIFL | Eiglera flavida (Hepp) Hafellner | | Eigleraceae
|