Cockroach Plant (Haplophyton cimicidum var. crooksii)
Mock Pennyroyal (Hedeoma hyssopifolia)
Silverleaf Sunflower (Helianthus argophyllus)
The Perennial Sunflowers (Helianthus spp)
Mountain Oxeye (Heliopsis parvifolia)
Island Renegade (Henrya insularis)
Bladdermallow (Herissantia crispa)
The Genus Heterotheca, Camphorweeds
Coral Bells ( Heuchera sanguinea)
The Genus Hibiscus
Sonoran Spider Lily (Hymenocallis sonorensis)
Trans-Pecos Thimblehead (Hymenothrix wislizeni)
Wright's Thimblehead (Hymenothrix wrightii)
The Genus Ipomopsis, the Skyrockets
