- Balsam-root
- Baneberry
- Picture 1
- Picture 2
- Picture 3
- Beavertail cactus
- Picture 1
- Picture 2
- Bedstraw
- Big leaf maple
- Bigelow's sneezeweed
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Picture 5
- Picture 6
- Picture 7
- Picture 8
- Picture 9
- Bird's-foot trefoil
- Bitter cherry
- Picture 1
- Picture 2
- Picture 3 (fruits)
- Bitter root
- Picture 1
- Picture 2
- Picture 3
- Black cottonwood
- Picture 1
- Picture 2
- Picture 3
- Blazing star
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Blue balls
- Picture 1
- Picture 2
- Picture 3
- Blue elderberry
- Picture 1
- Picture 2
- Picture 3
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- Blue-eyed mary
- Bog swertia
- Picture 1
- Picture 2
- Bracken fern
- Picture 1
- Picture 2
- Branching phacelia
- Picture 1
- Picture 2
- Brewer's golden aster
- Brewer's lupine
- Bridge's penstemon
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Picture 5
- Picture 6
- Bristlecone pine
- Picture 1
- Picture 2
- Picture 3
- Brittle bush
- Picture 1
- Picture 2
- Broad-leaved lotus
- Bush chinquapin
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Bush mallow
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Buttercup
- Butterfly mariposa
- Picture 1
- Picture 2
- Picture 3
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