Could not get my phone to focus on the moss, sorry for the bad photos.
Bigelow's Spikemoss (Selaginella bigelovii) is a Lycophyte (NOT a fern) in the Spikemoss (Selaginellaceae) family. It is native to California and Baja California, where it grows in rocky places in many different habitat types, from the coastline to the mountains to the deserts. This lycophyte forms clumps of spreading upright to erect stems up to 20 centimeters long with a few short lateral branches. The linear or lance-shaped green leaves are up to 4 millimeters long, including the tiny rigid bristles at the tips.
It is a UV fluorescent organism (that can be tested and confirmed using a black light at night).
Jepson eFlora https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=44043
Anza-Borrego Desert Wildflowers /https://borregowildflowers.org/?type=search&searchtype=S&family=&name=Selaginella%20bigelovii