Please do NOT identify this grass until my students have a chance to work on it. Plant is a loosely cespitose, biennial or short-lived perennial of grasslands.
Found them in a collection of puddles in an unpaved parking lot just outside of Ballona Wetlands Ecological Reserve. The puddles act similar to a vernal pool, often present year-round except in the summer.
Hair like feature
Yellow and green
Found in abundance
1 to 2 leaves per stem