25 juin 2019
H.R. Josephson, « Ridgetop south of Clipper Creek. Woodland chaparral type with Quercus wislizenii, Pinus sabiniana and a few trees of Ponderosa pine. Understory of Rhus diversiloba, Quercus wislizenii and Rhamnus crocea. Grass of Festuca and Bromus sp. », Berkeley Library Digital Collections, ID : 10670/1.1pyoz4