Gamochaeta Explained

Gamochaeta is a genus of flowering plants in the family Asteraceae.^[1] There has not always been agreement among botanists regarding its status as a recognized genus, but it has become more accepted in recent years.^{[2] [3]} It currently includes many plants that previously belonged in genus Gnaphalium. Like many species of Gnaphalium, many Gamochaeta are called cudweeds or everlastings.

Gamochaeta are native to North and South America, with one species endemic to Tristan da Cunha in the South Atlantic.^{[3] [4]} Some species are found in other regions as introduced species outside of their native ranges, and sometimes as invasive noxious weeds.^{[3] [5]}

Plants of this genus have "relatively small heads in spiciform (spike-like) arrays, concave post-fruiting receptacles, truncate collecting appendages of style branches in bisexual florets, relatively small cypselae (fruits) with minute, mucilage-producing papilliform hairs on the faces, and pappus bristles basally connate (joined) in smooth rings and released as single units."^[3]

Species^{[3] [6] [7] [8] [9]}

Notes and References

1. https://www.biodiversitylibrary.org/page/297565#page/161/mode/1up Weddell, Hugh Algernon. 1855. Chloris andina :essai d'une flore de la région alpine des Cordillères de l'Amérique du Sud 1(4–6): 151–154
2. Nesom, G. L. 1990. The taxonomic status of Gamochaeta (Asteraceae: Inuleae) and the species of the United States. Phytologia 68: 186–198.
3. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=113220 Gamochaeta.
4. Evenhuis, N. L. and L. G. Eldredge, Eds. (2012). Records of the Hawaii Biological Survey for 2011. Part II: Plants. Bishop Museum Occasional Papers No. 113.
5. http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=113220 Flora of China Vol. 20–21 Page 776 合冠鼠麴草属 he guan shu qu cao shu GamochaetaWeddell, Chlor. Andina. 1: 151. 1856.
6. http://www.theplantlist.org/browse/A/Compositae/Gamochaeta/ Gamochaeta.
7. http://www.ars-grin.gov/cgi-bin/npgs/html/splist.pl?4835 Gamochaeta.
8. https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=37416 Gamochaeta.
9. http://bonap.net/NAPA/TaxonMaps/Genus/County/Gamochaeta Biota of North America Program 2013 county distribution maps