25 juin 2019
Albert Everett Wieslander, « From open hill just north of Brownsville. Looking north and east showing second growth stand of ponderosa pine. Fir type in foreground: black oak, madrone, tanoak, Ceanothus integerrimus, Chamaebatia foliolosa, Arctostaphylos viscida. Yuba Co. », Berkeley Library Digital Collections, ID : 10670/1.ft5qz0