25 juin 2019
Albert Everett Wieslander, « Clapboard Canyon, 1.5 miles up canyon. Shows woodland type in canyon. Coast live oak with occasional sycamore or valley oak. Understory shrubs are Ceanothus sorediatus, Ribes californicum, Cornus sp., Pteris aquilina lanuginosa, Rubus vitifolius, Rhus diversiloba, Amorpha californica. », Berkeley Library Digital Collections, ID : 10670/1.rdytxq