Matricaria occidentalis, commonly known as valley mayweed, is an annual plant native to North America. It is in the family Asteraceae.
Description The stem is either branching or below the corymbose summit. It is high; not strongly scented; heads as much as in diameter, conical in shape and greenish yellow in color; achenes are sharply angled. It is used as substitute for chamomile. It is extremely similar to pineapple weed.
Distribution and habitat Usually occurs in wetlands, but occasionally found in non wetlands. It is native to California and Oregon.
References
External links USDA Plants Profile for Matricaria occidentalis (Valley mayweed) Jepson eFlora Taxon page for Matricaria occidentalis Calflora Taxon Report for Matricaria occidentalis