''Cosmos parviflorus'', also known as southwestern cosmos, is a species of plant in the family
Asteraceae found in North America. In many places it is a common weed in agricultural fields, although it also grows in grassy meadows in forested areas. The species appears to be native in
Texas,
New Mexico,
Colorado,
Arizona, and
Utah. Collections have also been made from
Massachusetts,
Maine,
Maryland,
Missouri,
Rhode Island, although it appears to be introduced to those regions.
It is widespread in
Mexico from
Chihuahua Chihuahua may refer to:
Places
*Chihuahua (state), a Mexican state
**Chihuahua (dog), a breed of dog named after the state
**Chihuahua cheese, a type of cheese originating in the state
**Chihuahua City, the capital city of the state
**Chihuahua Mun ...
to
Oaxaca.
Description
''Cosmos parviflorus'' attains a height of up to 100 cm (40 inches). Leaves are deeply divided into narrow linear segments.
Ray florets red, pink or white, the colors sometimes mixed in the same population.
Achenes are barbed, causing them to lodge in fur or clothing. They can thus be transported over long distances.
[Wiggins. Vegetation and Flora of the Sonoran Desert. Stanford University Press, 1964]
References
External links
Photo of herbarium specimen at University of Texas Herbarium in Austin, collected in Mexico State in central Mexico
parviflorus
Flora of Northern America
Plants described in 1798
{{Asteroideae-stub