Strong differentiation across an edaphic gradient between the gabbro-endemic shrub Ceanothus roderickii (Rhamnaceae) and the soil generalist C. cuneatus.

Burge, D.O., R. Hopkins, Y. Tsai, P. Manos. 2013. Limited hybridization across an edaphic disjunction between the gabbro-endemic shrub Ceanothus roderickii (Rhamnaceae) and the soil generalist C. cuneatus. American Journal of Botany 100: 1883-1895. [PDF]