Southeastern Arizona plant common names that begin with E.
- Easter Bonnets, White
- Easterbonnets, White
- Eastern Mojave Buckwheat
- Eaton's Firecracker
- Eaton's Penstemon
- Egyptian Mallow
- Elder, Mexican
- Elder, Yellow
- Elderberry, American Black
- Elderberry, Common
- Elephant Grass
- Emory's Desertmallow
- Emory's Globemallow
- Encelia, Rayless
- Engelmann's Prickly Pear
- Engelmann's Pricklypear
- Entireleaf Morningglory
- Ephedra, Longleaf
- Esteve's Pincushion
- Eucrypta, Small-flowered
- Eupatorium, Gregg's
- European Bindweed
- Evening Primrose, Desert
- Evening Primrose, Fragrant
- Evening Primrose, Hooker's
- Evening Primrose, Mustard
- Evening Primrose, Rose
- Evening Primrose, Tufted
- Evening Primrose, Yellow Desert
- Evening Scented Stock
- Evening Stock
- Evening-primrose, Bottle
- Evening-primrose, Cespitose
- Evening-primrose, Pink
- Evening-primrose, Rosy
- Evening-primrose, Western
- Evolvulus, Hairy
- Evolvulus, Prostrate
- Evolvulus, Shaggy
- Evolvulus, Silky
- Exserted Indian Paintbrush