United States, California, Solano, California Delta: Cordelia Hill.
38.206944 -122.121944
38§ 12m 25s N; 122§ 7m 19s W
15 meters (49ft)
Riparian near creek and blue oak savannah and oak woodland on slopes. Dominant annual herb to 70 cm in wet soil of creek channel with Polygonum persicaria, P. lapathifolium & Cyperus eragrostis. Flowers pink.
Label says: Herbarium of CA Dept. Food & Agriculture CDA. Entered into CDA database (19368 Ammi).