Echinopsis huascha 
Edmondston's Chickweed 
Egyptian Campion 
Elands sour fig 
Elephant Bush 
Emory's Barrel Cactus 
Engelmann's Pricklypear 
Erect Prickly Pear 
Erect Spiderling 
Eremogone picta 
Eriogonum thymoides 
Espostoa huanucoensis 
Espostoa melanostele 
Espostoa utcubambensis 
European bistort 
Fanged Pitcher-Plant 
Fenestraria 
Ferocactus pilosus 
Fescue sandwort 
Field mouse-ear 
Fire pink 
Fish bone cactus 
Fishhook barrel cactus 
Five-stamen Tamarisk