- Ceanothus americanus – New Jersey Tea; Red Root
- Ceanothus arboreus – Feltleaf Ceanothus
- Ceanothus confusus – Rincon Ridge Ceanothus
- Ceanothus connivens – Trailing Buckbrush
- Ceanothus cordulatus – Whitethorn Ceanothus
- Ceanothus crassifolius – Hoaryleaf Ceanothus
- Ceanothus cuneatus – Buckbrush
- Ceanothus cuneatus var. fascicularis – Hoover Sedgeleaf Buckbrush
- Ceanothus cuneatus var. rigidus – Monterey Ceanothus
- Ceanothus cyaneus – San Diego Buckbrush
- Ceanothus dentatus – Sandscrub Ceanothus
- Ceanothus divergens – Calistoga Ceanothus
- Ceanothus diversifolius – Pinemat
- Ceanothus fendleri – Fendler's Ceanothus
- Ceanothus ferrisiae – Coyote Ceanothus
- Ceanothus foliosus – Wavyleaf Ceanothus
- Ceanothus foliosus var. foliosus – Wavyleaf Ceanothus
- Ceanothus foliosus var. medius – Wavyleaf Ceanothus
- Ceanothus foliosus var. vineatus – Vine Hill Ceanothus
- Ceanothus fresnensis – Fresno Ceanothus
- Ceanothus gloriosus – Point Reyes Ceanothus
- Ceanothus gloriosus var. exaltatus – Point Reyes Ceanothus
- Ceanothus gloriosus var. gloriosus – Point Reyes Ceanothus
- Ceanothus gloriosus var. porrectus – Mt. Vision Ceanothus
- Ceanothus greggii – Desert Ceanothus
- Ceanothus greggii var. greggii – Desert Ceanothus
- Ceanothus greggii var. perplexans – Desert Ceanothus
- Ceanothus greggii var. vestitus – Mojave Ceanothus
- Ceanothus griseus – Carmel Ceanothus
- Ceanothus hearstiorum – Hearst Ranch Buckbrush
- Ceanothus herbaceus – Jersey Tea
- Ceanothus impressus – Santa Barbara Ceanothus
- Ceanothus impressus var. impressus – Santa Barbara Ceanothus
- Ceanothus impressus var. nipomensis – Santa Barbara Ceanothus
- Ceanothus incanus – Coast Whitethorn
- Ceanothus integerrimus – Deerbrush Ceanothus
- Ceanothus jepsonii – Jepson Ceanothus
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- Ceanothus jepsonii var. albiflorus – Jepson Ceanothus
- Ceanothus jepsonii var. jepsonii – Jepson Ceanothus
- Ceanothus lemmonii – Lemmon's Ceanothus
- Ceanothus leucodermis – Chaparral Whitethorn
- Ceanothus maritimus – Maritime Ceanothus
- Ceanothus martinii – Martin's Ceanothus
- Ceanothus masonii – Mason's Ceanothus
- Ceanothus megacarpus – Bigpod Ceanothus
- Ceanothus megacarpus var. insularis – Island Ceanothus
- Ceanothus megacarpus var. megacarpus – Bigpod Ceanothus
- Ceanothus microphyllus – Littleleaf Buckbrush
- Ceanothus oliganthus – Hairy Ceanothus
- Ceanothus ophiochilus – Vail Lake Ceanothus
- Ceanothus palmeri – Palmer Ceanothus
- Ceanothus papillosus – Wartleaf Ceanothus
- Ceanothus papillosus var. papillosus – Wartleaf Ceanothus
- Ceanothus papillosus var. roweanus – Wartleaf Ceanothus
- Ceanothus parryi – Parry Ceanothus
- Ceanothus parvifolius – Littleleaf Ceanothus
- Ceanothus pinetorum – Coville Ceanothus
- Ceanothus prostratus – Prostrate Ceanothus
- Ceanothus pumilus – Dwarf Ceanothus
- Ceanothus purpureus – Hollyleaf Ceanothus
- Ceanothus roderickii – Pine Hill Buckbrush
- Ceanothus sanguineus – Redstem Ceanothus
- Ceanothus serpyllifolius – Coastal Plain Buckbrush
- Ceanothus sonomensis – Sonoma Ceanothus
- Ceanothus sorediatus – Jimbrush Ceanothus
- Ceanothus spinosus – Green Bark Ceanothus
- Ceanothus thyrsiflorus – Blueblossom
- Ceanothus tomentosus – Woolyleaf Ceanothus
- Ceanothus velutinus – Snowbrush Ceanothus
- Ceanothus velutinus var. hookeri – Hooker's Ceanothus
- Ceanothus velutinus var. velutinus – Snowbrush Ceanothus
- Ceanothus verrucosus – Barranca Brush
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