1 species
1 subspecies and varieties
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Polycarpon tetraphyllumfourleaf allseed, fourleaf manyseed
Distribution: Occurring in scattered locations west of the Cascades crest in lowland western Washington; British Columbia to California, also in the southern U.S.
Habitat: Lawns, meadows, roadsides, wastelots, and other disturbed areas at low elevation.
Origin: Introduced from Europe
Flowers: April-June
ssp. tetraphyllum – fourleaf allseed, fourleaf manyseed