Science magazines
- Encinitas Baccharis
- Erubia
- Eskimo Curlew
- Etonia Rosemary
- Etowah Darter
- Eugenia Woodburyana
- Eureka Valley Dune Grass
- Eureka Valley Evening-primrose
- Fanshell
- Fassett's Locoweed
- Fat Pocketbook
- Fat Threeridge Mussel
- Fender's Blue Butterfly
- Few-flowered Navarretia
- Finback Whale
- Fine-lined Pocketbook
- Fine-rayed Pigtoe Pearlymussel
- Fish Slough Milk-vetch
- Flat Pebblesnail
- Flat Pigtoe