Answer:
Easter lily
Echeveria
Echinacea
Echium
Eidelweiss
Elder
Elderflower
English Bluebell
Eremophila
Eremurus
Erica
Erigeron
Eriostemon
Euryops
Eustoma
Evening primrose
Eranthis Hyemalis (commonly known as the Winter Aconite)
clifornia poppy (eschscholzia californica)
Everlasting-a beautiful flower in hues from white to pink to red to deep purple.
Enchanter's Nightshade-a flower that refuses to bloom in the sunlight
Elastic Momordica-very rare and hard to grow lilac-colored flower