Cyperus bipartitus Torr.
Annotated by Peter F. Zika, 2015.

Washington: Clark County: East shore of Columbia River ca 0.8 km south of Frenchmans Bar Regional Park. Elev. 3 m.
45.673203° N, 122.764733° W
Datum: WGS 84. Uncertainty: 33 meters. Coordinate Source: Digital Map.
Wet, exposed, silty bar on river bank adjacent to mouth of small stream; water levels influenced by tides; with low, lawn-like cover of Eleocharis, Limosella aquatica, and Mazus pumilus bordered below by mostly bare mud, and bordered on upper side by lush growth of Leerzia oryzoides and Helenium autumnale. Stems densely tufted; spikelets broad and flat; common. Photographed. Phenology: Flowers and Fruits.

Ben Legler 13844, Sep 11, 2015
WTU