- False lupine
- Picture 1
- Picture 2
- Farewell to spring
- Picture 1
- Picture 2
- Picture 3
- Fern-leaved Catalina ironwood
- Picture 1 (Rare)
- Picture 2 (Rare)
- Picture 3 (Rare)
- Picture 4 (Rare)
- Picture 5 (Rare)
- Picture 6 (Rare)
- Fiddle dock
- Fiddleneck
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Picture 5
- Picture 6
- Field chickweed
- Field madder
- Field mustard
- Picture 1
- Picture 2
- Fiesta flower
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Fire poppy
- Picture 1
- Picture 2
- Picture 3
- Picture 4
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- Fishnet lichen
- Picture 1
- Picture 2
- Flannel bush
- Flowering ash
- Picture 1
- Picture 2
- Fluff grass
- Foothill penstemon
- Fountain grass
- French broom
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Picture 5
- Fringe cups
- Picture 1
- Picture 2
- Picture 3
- Fringe pod
- Fuchsia-flowered gooseberry
- Picture 1 (fruits)
- Picture 2
- Picture 3
- Picture 4
- Picture 5
- Picture 6
- Fuller's teasel
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Picture 5
- Picture 6
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