Fritzsche, R. A. 1980. Proceedings of the California Academy of Sciences, Fourth Series. 42 (6): 185.
Girard, C. F. 1858. Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean. 10: 342.
Type Status:
Paralectotype
Syntype
Place:
San Diego Cal., San Diego County, California, United States, Pacific