Gamochaeta coarctata explained

Gamochaeta coarctata, the gray everlasting (also known as cudweed, like other members of its genus), 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.^{[1] [2] [3]}

Gamochaeta coarctata is an annual herb up to 15cm (06inches) tall. Leaves are up to 3cm (01inches) long. The plant forms many small flower heads in elongated arrays. Each head contains 2–4 yellow disc flowers but no ray flowers.^[4]

Some specimens collected in the United States were formerly misidentified as G. americana, which does not grow in the United States.^{[1] [5]}

External links

• photo of herbarium specimen at Missouri Botanical Garden, collected in Peru in 1973

Notes and References

1. http://www.guynesom.com/Gamochaetarecords.pdf Guy L. Nesom 2004. New distribution records for Gamochaeta (Asteraceae: Gnaphalieae) in the United States. Sida 21(2): 1175–1185.
2. http://bonap.net/MapGallery/County/Gamochaeta%20coarctata.png Biota of North America Program 2014 county distribution map
3. http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=9976 Calflora taxon report, University of California, Gamochaeta coarctata
4. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250006652 Flora of North America, Gamochaeta stachydifolia (Lamarck) Cabrera, 1961.
5. https://www.biodiversitylibrary.org/page/12886195#page/34/mode/1up Guy L. Nesom 1990. The taxonomic status of Gamochaeta (Asteraceae: Inuleae) and the species of the United States. Phytologia 68:186–198.