Galvezia juncea 'Grand Canon'   Grand Canon Bush Snapdragon   (Horticultural)

Galvezia juncea 'Punta Banda'   Punta Banda Bush Snapdragon   (Horticultural)

Galvezia speciosa   Island Bush Snapdragon   (Southern)  

Galvezia speciosa ‘Firecracker’   Firecracker Island Bush Snapdragon   (Horticultural)

Garrya elliptica   Coast Tassel Bush   (Northern, Central)

Garrya elliptica 'Evie'   Evie Silktassel   (Horticultural)

Garrya elliptica 'James Roof'   James Roof Silktassel   (Horticultural)

Gilia capitata   Globe Gilia   (Statewide)

Gilia tricolor   Tricolored Gilia   (Southern, Northern)

Grindelia camporum   Great Valley Gumplant   (Southern, Central)

Grindelia camporum var. bracteosa   Rayless Gumplant   (Southern, Central, Baja California)

Grindelia stricta var. platyphylla   Coast Gumplant   (Central, Channel Islands, Northern)

Gutierrezia californica   California Matchweed   (Southern, Central, Baja California)

Hazardia cana   San Clemente Island Hazardia   (San Clemente Island & Guadalupe Island)

Hazardia detonsa   Island Bristleweed   (Channel Islands)

Hazardia squarrosa   Sawtooth Goldenbush   (Southern, Central, Baja California)

Helianthemum scoparium   Peak Rush-Rose   (Statewide)

Heliotropium curassavicum   Salt Heliotrope   (Statewide)

Hesperoyucca whipplei   Chaparral Candle   (Southern, Baja California)

Heteromeles arbutifolia   Toyon   (Statewide)

Heuchera 'Canyon Duet'   Canyon Duet Coral Bells   (Hybrid)

Heuchera 'Canyon Pink'   Canyon Pink Coral Bells   (Hybrid)

Heuchera maxima   Island Alum Root   (Southern, Islands)

Heuchera species 

Hosackia crassifolius   Buck Lotus   (San Diego-Otay Mountain)

Hyptis emoryi 'Silver Lining'   Silver Lining Desert Lavender   (Horticultural)

Iris douglasiana   Douglas Iris   (Northern, Central)

Iris 'Canyon Snow'   Canyon Snow Iris   (Horticultural)

Iris 'Pacific Coast'   Pacific Coast Iris   (Hybrid)

Isocoma menziesii   Goldenbush   (Statewide)

Isomeris (Peritoma) arborea   Bladderpod   (Southern)

Iva hayesiana   San Diego Marsh-Elder   (Southern)