Gamochaeta ustulata explained

Gamochaeta ustulata, commonly named featherweed or Pacific cudweed, is a North American species of flowering plant in the family Asteraceae. It is native to the western United States and southwestern Canada, in British Columbia, Washington, Oregon, and California. It is found primarily on seaside hills and in the Coast Ranges, with additional populations inland.^{[1] [2] [3] [4]}

Gamochaeta ustulata is an annual or perennial herb up to 40cm (20inches) tall. Leaves are up to 5cm (02inches) long, green on the top but appearing white on the underside because of many woolly hairs. The plant forms many small flower heads in elongated arrays. Each head contains 4–6 yellow disc flowers but no ray flowers.^[5]

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. https://www.biodiversitylibrary.org/page/9310948#page/737/mode/1up Nesom, Guy L. 2004. Sida 21(2): 717–741
3. http://bonap.net/MapGallery/County/Gamochaeta%20ustulata.png Biota of North America Program 2014 county distribution map
4. http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=9339 Calflora taxon report, University of California, Gamochaeta ustulata (Nutt.) Nesom, featherweed
5. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066795 Flora of North America, Gamochaeta ustulata (Nuttall) Holub, 1976. Featherweed, Pacific cudweed