Gamochaeta coarctata, the gray everlasting (also known as cudweed, like other members of its genus),[2] is a species of flowering plant in the family Asteraceae. It is widespread in South America (from Colombia to Uruguay) and naturalized in parts of Eurasia, Australia, and North America.[3][4][5]

Gamochaeta coarctata is an annual herb up to 15 cm (5.9 in) tall. Leaves are up to 3 cm (1.2 in) long. The plant forms many small flower heads in elongated arrays. Each head contains 2–4 yellow disc flowers but no ray flowers.[6]

Some specimens collected in the United States were formerly misidentified as G. americana, which does not grow in the United States.[3][7]

References

  1. ^ The Plant List, Gnaphalium coarctatum Willd.
  2. ^ NRCS. "Gamochaeta coarctata". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 17 July 2015.
  3. ^ a b Guy L. Nesom 2004. New distribution records for Gamochaeta (Asteraceae: Gnaphalieae) in the United States. Sida 21(2): 1175–1185.
  4. ^ Biota of North America Program 2014 county distribution map
  5. ^ Calflora taxon report, University of California, Gamochaeta coarctata
  6. ^ Flora of North America, Gamochaeta stachydifolia (Lamarck) Cabrera, 1961.
  7. ^ Guy L. Nesom 1990. The taxonomic status of Gamochaeta (Asteraceae: Inuleae) and the species of the United States. Phytologia 68:186–198.


Allikas: https://en.wikipedia.org/wiki/Gamochaeta_coarctata
No tags for this post.