Ageratina thyrsiflora

Ageratina thyrsiflora is a North American species of plants in the sunflower family. It is native mostly to northwestern Mexico (states of Chihuahua, Durango, Jalisco, Sinaloa, and Sonora). The range extends just barely into the United States, a single herbarium specimen having been collected in 1929 just north of the border town of Nogales, Arizona.[2][3][4]

Ageratina thyrsiflora
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Ageratina
Species:
A. thyrsiflora
Binomial name
Ageratina thyrsiflora
(Greene) R.M.King & H.Rob.
Synonyms[1]
  • Eupatorium thyrsiflorum (Greene) B.L.Rob.
  • Kyrstenia thyrsiflora Greene

Etymology

Ageratina is derived from Greek meaning 'un-aging', in reference to the flowers keeping their color for a long time. This name was used by Dioscorides for a number of different plants. Thyrsiflora is derived from the Ancient Greek thyrsos (θύρσος; meaning a 'contracted panicle, wreath, or thyrsos') and the Latin floris (gen. 'flower'), and so, thyrsiflora means approximately 'with flowers arranged in the shape of a contracted panicle or thyrsos staff'.[5]

References
  1. "Ageratina thyrsiflora (Greene) R.M.King & H.Rob.". The Global Compositae Checklist (GCC) – via The Plant List.
  2. Nesom, Guy L. (2006). "Ageratina thyrsiflora". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). 21. New York and Oxford – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  3. "Ageratina thyrsiflora". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  4. Turner, B. L. 1997. The Comps of Mexico: A systematic account of the family Asteraceae, vol. 1 – Eupatorieae. Phytologia Memoirs 11: i–iv, 1–272
  5. Gledhill, David (2008). "The Names of Plants". Cambridge University Press. ISBN 9780521866453 (hardback), ISBN 9780521685535 (paperback). pp 39, 168


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