Buckbrush: Ceanothus cuneatus var. cuneatus - Foliage opposite-leaved.
Deerbrush, Deer Brush: Ceanothus integerrimus (Synonyms: Ceanothus andersonii, Ceanothus californicus, Ceanothus integerrimus var. californicus, Ceanothus integerrimus var. macrothyrsus) - Leaves deciduous. Flowers white, lilac or powder blue. Upper leaf surfaces neither shiny nor sticky. Leaf margins entire and non-glandular.
Mahala Mat, Prostrate Ceanothus: Ceanothus prostratus (Synonyms: Ceanothus divergens ssp. occidentalis, Ceanothus prostratus var. laxus, Ceanothus prostratus ssp. prostratus) -
Buck Brush, Oregon Teatree, Oregon Tea Tree, Redstem Ceanothus: Ceanothus sanguineus - Leaves deciduous. Flowers white. Upper leaf surfaces not shiny and sticky. Leaf margins with minute, forward-pointing teeth that are glandular.
Snow Brush, Sticky Laurel, Tobacco Brush: Ceanothus velutinus var. velutinus (Synonym: Ceanothus velutinus ssp. velutinus) - Leaves persistent all year long. Upper leaf surfaces shiny and sticky or gummy. Flowers white.
Cascara, Chittam, Chittam Bark, False Buckthorn: Rhamnus purshiana (Synonym: Frangula purshiana) - Leaves deciduous. Flowers greenish-yellow, the petals lacking or short-clawed.