Echinochloa, Genus
Echinops, Genus
Echium, Genus
Egeria, Genus
Elaeagnaceae, Family
Elaeagnus, Genus
Elatinaceae, Family
Elatine, Genus
Eleocharis, Genus
Eleogiton, Genus
Eleusine, Genus
Elodea, Genus
Elymus, Genus
Elytrigia, Genus
Empetraceae, Family
– synoniem van Ericaceae, Family
Empetrum, Genus
Epilobium, Genus
Epimedium, Genus
Epipactis, Genus
Equisetaceae, Family
Equisetum, Genus
Eragrostis, Genus
Eranthis, Genus
Erica, Genus
Ericaceae, Family
Ericales, Order
Erigeron, Genus
Eriophorum, Genus
Erodium, Genus
Erophila, Genus
Eruca, Genus
Erucastrum, Genus
Eryngium, Genus
Erysimum, Genus
Eschscholzia, Genus
Euonymus, Genus
Eupatorium, Genus
Euphorbia, Genus
Euphorbiaceae, Family
Euphrasia, Genus
Euthamia, Genus