Science magazines
- Fragrant Prickly-apple
- Fresno Kangaroo Rat
- Fringed Campion
- Furbish Lousewort
- Gahnia Lanaiensis
- Garber's Spurge
- Garrett's Mint
- Gaviota Tarplant
- Gentian Pinkroot
- Gentner's Fritillaria
- Geocarpon Minimum
- Gesneria Pauciflora
- Giant Garter Snake
- Giant Kangaroo Rat
- Gila Topminnow Yaqui Topminnow
- Gila Trout
- Godfrey's Butterwort
- Golden Coqui
- Golden Paintbrush
- Golden-cheeked Warbler