- Hazardia squarrosa
- Picture 1
- Picture 2
- Picture 3
- Helenium puberulum
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Picture 5
- Picture 6
- Helianthemum scoparium
- Picture 1
- Picture 2
- Picture 3
- Helianthus annuus
- Picture 1
- Picture 2
- Picture 3
- Helianthus gracilentus
- Picture 1
- Picture 2
- Heliotropium curassavicum
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Hemizonia congesta ssp. luzulifolia
- Picture 1
- Picture 2
- Hemizonia fasciculata
- Hemizonia minthornii
- Picture 1 (Rare)
- Picture 2 (Rare)
- Picture 3 (Rare)
- Picture 4
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- Heracleum lanatum
- Heteromeles arbutifolia
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Heterotheca grandiflora
- Picture 1
- Picture 2
- Picture 3
- Picture 4
- Heuchera maxima
- Hoffmannseggia glauca
- Picture 1
- Picture 2
- Picture 3
- Hoita macrostachya
- Picture 1 ((Psoralea))
- Picture 2
- Hoita orbicularis
- Picture 1
- Picture 2
- Holodiscus discolor
- Picture 1
- Picture 2
- Hordeum murinum ssp. glaucum
- Hordeum vulgare
- Horkelia cuneata
- Picture 1
- Picture 2
- Picture 3
- Hypochaeris glabra
- Picture 1
- Picture 2
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