Science magazines
- Brady Pincushion Cactus
- Braun's Rock-cress
- Braunton's Milk-vetch
- Bridled White-eye
- Britton's Beargrass
- Brooksville Bellflower
- Bruneau Hot Springsnail
- Bull Trout
- Bunched Arrowhead
- Bunched Cory Cactus
- Burke's Goldfields
- Butte County Meadowfoam
- Cactus Ferruginous Pygmy-owl
- Cahaba Shiner
- California Clapper Rail
- California Condor
- California Freshwater Shrimp
- California Jewelflower
- California Least Tern
- California Orcutt Grass