jordanzylstra's Identifications

One of the two wettest spots along the road system at the top of Baldy Mountain.

Observations:
Rhizomed perennial.

Stem 31 cm tall, 1.5 mm wide.
Infl 10 x 3 mm, with ~31 fl bracts. Infl bract (single one at bottom of infl) 1.8 mm, membranous.

Fl scales dark brown, 3.0 to 3.5 mm long x 1.0 mm wide, not wrinkled, not recurved. Scales in lower half of spikelet acute tipped.
Anthers 2, 2.0 mm, mucronate.

~6 bristles surrounding ovary, from 1.6 to 4.0 mm long.
Ovary with a "cap".
Stigmas 3.

This keys to E. parishii in the Jepson Manual key, on the shape of the flower bract tips, and the lack of them being transversely wrinkled and recurved.
These plants fit the Jepson Manual description except that the stem with is not "0.2 to 1.0 mm", which is less serious than the disagreements with E. montevidensis.

See also the nearby plants from the other wettest areas

https://www.inaturalist.org/observations/49163716

The view of the entire plants shows typical C.m. jonesii for all but the most prominent plant in the foreground. Usually, C.m. jonesii has no branches from the base. I suspect the central stem of that plant got damaged, so it produced roughly equal new stems from the base, each of which individually looks like typical C.m. jonesii, with branches only in the upper half of the stem.