Bidens amplissima Greene

Washington: King County: West of Route 167 and M Street NW, Mill Creek drainage, 3.4 air kilometers east of Lake Dolloff, Auburn. Elev. 15 m.
47.3276° N, 122.2399° W
Coordinate Source: Specimen Label.
Common on dried edges of large vernal pool, full sun, seasonally wet soil; with Gnaphalium uliginosum, Rorippa curvisiliqua, Lythrum portula, Eleocharis palustris, E. obstusa. Annual, 7-10 bright yellow rays with blades 6-11 millimeters long, anthers dark purple, fruits 3-4 awned, warty, heads erect in fruit, most leaves simple. Phenology: Flowers and Fruits.

Peter F. Zika 29387, Aug 7, 2018
WTU, Accession: 419131, Barcode: WTU-V-041595