Polycarpon tetraphyllum (L.) L. ssp. tetraphyllum
Annotated by Ben Legler, Jul 2016.

Washington: King County: North side of Shilshole Avenue NW midway between 22nd Avenue NW and 24th Avenue NW, Ballard. Elev. 11 m.
47.667581° N, 122.386062° W
Datum: WGS 84. Uncertainty: 4 meters. Coordinate Source: GPS.
Dry concrete and pavement between road and an old industrial building; full sun; with Matricaria discoidea, Polygonum aviculare, Conyza canadensis, Hordeum murinum. Leaves opposite or apparently in whorls of 4, obovate; sepals with thick green midrib, scarious margins, and apiculate tip; plants annual, forming low mounds or mats to 15 cm wide; common weed growing in cracks along sidewalk and pavement for several hundred meters in both directions along street. Phenology: Flowers & Fruits.

Ben Legler 14207, Jul 26, 2016
WTU, Accession: 418966, Barcode: WTU-V-041869