Science magazines
- Barneby Ridge-cress
- Barton Springs Salamander
- Bay Checkerspot Butterfly
- Bayou Darter
- Beach Jacquemontia
- Beach Layia
- Bear Valley Sandwort
- Beautiful Goetzea
- Beautiful Pawpaw
- Beautiful Shiner
- Bee Creek Cave Harvestman
- Behren's Silverspot Butterfly
- Ben Lomond Spineflower
- Ben Lomond Wallflower
- Big Bend Gambusia
- Big Spring Spinedace
- Big-leaved Crown-beard
- Birdwing Pearlymussel
- Black Clubshell
- Black Lace Cactus