Unidentified Quillwort #1: Isoetes sp. ? - I need to return to this site to make sure these aren't Lilaeopsis occidentalis.
Howell's Quillwort: Isoetes howellii (Synonyms: Isoetes melanopoda, Isoetes melanopoda var. californica, Isoetes nuda, Isoetes underwoodii)
Nuttall's Quillwort: Isoetes nuttallii (Synonym: Isoetes nuttallii var. nuttallii, Isoetes opaca, Isoetes suksdorfii)