| Literature | Crum and Anderson 1981; Kellman 2003; Lawton 1971; Spence 1988a; Toren 1977; Yurky 1990, 1995. |
| Illustrations | Ignatov and Ignatova 2003; Ireland 1982; Lawton 1971; Smith 1978; Zolotov 2000. |
| Notes | Needs update to Gemmabryum violaceum (Crundwell & Nyholm) J. R. Spence |
| Bioregions | CaR, CW, DMoj, DSon, NW, SN, SW. |
| Vouchers | Contra Costa Co.: Mt. Diablo State Park, Norris 100525; Fresno Co.: Middle Fork Kings River near LeConte Ranger Station, Kings Canyon National Park, Shevock & Haultain 18628 (determined by Allen); Lake Co.: end of Hells Peak Road, Toren 843 (CAS); Marin Co.: Pike County Gulch, Yurky 309 (SFSU); Monterey Co.: Sam Jones Road about 1 km east of Piojo Airstrip, Hunter-Liggett Military Reservation, Norris 87220 & 87221; San Bernardino Co.: Pachalka Spring, Clark Mountain, Mojave National Preserve, Laeger, Newman & Adams 1800 (CAS) [determined by Spence]; Santa Cruz Co.: Bonny Doon, Kellman 917 (CAS). |
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