''Matricaria occidentalis'', commonly known as valley mayweed,
is an
annual plant native to
North America. It is in the family
Asteraceae
The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae ...
.
Description
The stem is either branching or below the
corymbose
Corymb is a botanical term for an inflorescence with the flowers growing in such a fashion that the outermost are borne on longer pedicels than the inner, bringing all flowers up to a common level. A corymb has a flattish top with a superficial re ...
summit. It is high; not strongly scented; heads as much as in diameter, conical in shape and greenish yellow in color;
achenes
An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) and indehiscent (they do not op ...
are sharply angled. It is used as substitute for
chamomile
Chamomile (American English) or camomile (British English; see spelling differences) ( or ) is the common name for several plants of the family Asteraceae. Two of the species, '' Matricaria recutita'' and '' Anthemis nobilis'', are commonly ...
.
Distribution and habitat
Usually occurs in wetlands, but occasionally found in non wetlands. It is native to
California
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the ...
and
Oregon
Oregon () is a state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idah ...
.
References
External links
USDA Plants Profile for ''Matricaria occidentalis'' (Valley mayweed)Jepson eFlora Taxon page for ''Matricaria occidentalis''Calflora Taxon Report for ''Matricaria occidentalis''
{{Taxonbar, from=Q15556804
Matricaria
Flora of the Northwestern United States
Flora of the Southwestern United States
Flora of the Sierra Nevada (United States)
Flora of California
Flora of Oregon
Flora without expected TNC conservation status