Cosmos parviflorus

Cosmos parviflorus is a North American species of plants in the sunflower family. Common names include southwestern cosmos in the US and juve or aceitilla blanca in Mexico.[2] 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.[3][4] It is widespread in Mexico from Chihuahua to Oaxaca.[5][6][7][8]

Cosmos parviflorus
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Heliantheae
Genus:
Cosmos
Species:
C. parviflorus
Binomial name
Cosmos parviflorus
(Jacq.) Pers.
Synonyms[1]
  • Coreopsis parviflora Jacq.
  • Cosmea parviflora Willd.
  • Cosmos bipinnatus var parviflorus (Jacq.) A. Gray
  • Bidens humboldtii Sch.Bip

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.[3][9][10]

References
  1. The Plant List Cosmos parviflorus
  2. iNaturalist, aceitilla blanca
  3. Flora of North America, Cosmos parviflorus (Jacquin) Persoon, Syn. Pl. 2: 477. 1807.
  4. Biota of North America Program 2014 county distribution map
  5. Encyclopedia of Life
  6. Tropicos specimen list for Cosmos parviflorus (Jacq.) Pers.
  7. García-Mendoza, A. J. & J. A. Meave. 2011. Diversidad Florística de Oaxaca: de Musgos a Angispermas 1–351. Universidad Nacional Autónoma de México, Ciudad Universitaria
  8. SEINet, Southwest Biodiversity, Arizona Chapter, Cosmos parviflorus includes description, photos, distribution map
  9. Loughmiller, C. & L. Loughmiller. 1984. Texas wildflowers: a field guide. Austin, Texas: University of Texas Press.
  10. Wiggins. Vegetation and Flora of the Sonoran Desert. Stanford University Press, 1964


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