Buckthorn Family - Photo (c) Douglas Goldman, some rights reserved (CC BY), uploaded by Douglas Goldman Comprehensive check list for Buckthorn Family (Family Rhamnaceae)
Source: Calflora: Information on California plants for education, research and conservation. [web application]. 2012. Berkeley, California: The Calflora Database [a non-profit organization]. Available: http://www.calflora.org/ (Accessed: 42 07, 2012). (Link)