25 juin 2019
Albert Everett Wieslander, « Bates Canyon. Canyon oak type burned over in 1923. Ceanothus divaricatus and Amorpha californica. Ground cover of Ribes. Note height as indicated by 3' rule. Assoc species: Ceanothus cuneatus in vicinity. », Berkeley Library Digital Collections, ID : 10670/1.wyc52k