Glaucopsyche piasus umbrosa J. Emmel, T. Emmel & Mattoon, 1998;  Comments: TL: USA (Ca) .

Glaucopsyche piasus umbrosa ALLOTYPE ♀ USA: CALIFORNIA: San Diego Co.,
Laguna Mtns., slope ca. 0.2 air mile east of Big Laguna Lake, 5450 ft. el.,
S10, T15S, R5E, 28-IV-87 [LACM]