United States, California, Los Angeles, Transverse Range; San Gabriel Mountains; approximately 16.7 air-miles north of Monrovia, approximately 1.3 air-mile northeast of Vetter Mountain and 0.75 air-mile southwest of Chilao Station, in canyon of East Fork Alder Creek. T03N R11W S27 SW1/4 USGS Quadrangle: Chilao Flat 1:24,000
34.314722 -118.020556 +-402m. NAD83
T03N R11W S27 SW1/4; 34§ 18m 53s N; 118§ 1m 14s W
1494 meters
4900ft.
Growing on rocky partially shaded slope in conifer forest.