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Steviopsis

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Steviopsis
Steviopsis dryophila
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Eupatorieae
Genus: Steviopsis
R.M.King & H.Rob.
Type species
Eupatorium adenospermum[1]

Steviopsis is a genus of Mexican plants in the tribe Eupatorieae within the family Asteraceae.[1][2][3]

Description

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Members of Steviopsis are perennial herbs that have heads composed entirely of disk flowers, a pappus of capillary bristles, narrow corollas with spreading lobes, and glands on the cypselae (achenes). The base chromosome number is x=10, which distinguishes it in part from the morphologically similar Brickellia. The genus is endemic to Mexico.

Taxonomy

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The genus was originally described by King and Robinson[1] as part of the splitting of Eupatorium into monophyletic units. The distinctiveness and circumscription of the genus were recently assessed using molecular phylogenetic approaches [4][5]

Species[6][7]
formerly included[6]

see Asanthus Brickelliastrum Dyscritogyne

References

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  1. ^ a b c King, Robert Merrill & Robinson, Harold Ernest. 1971. Studies in the Eupatorieae (Asteraceae) LIX. A new genus, Steviopsis. Phytologia 22: 156-157
  2. ^ D.J.N.Hind & H.E.Robinson. 2007. Tribe Eupatorieae In: The Families and Genera of Vascular Plants vol.VIII. (Joachim W.Kadereit & Charles Jeffrey, volume editors. Klaus Kubitzky, general editor). Springer-Verlag. Berlin, Heidelberg.
  3. ^ Tropicos, Steviopsis R.M. King & H. Rob.
  4. ^ Schilling, E. E., J. L. Panero, B. S. Crozier & P. Davila. 2013. Relationships of Asanthus (Asteraceae, Eupatorieae). Systematic Botany 38: 253-258.
  5. ^ Turner, Billie Lee. 1988. Phytologia 64: 259-262
  6. ^ a b Flann, C (ed) 2009+ Global Compositae Checklist
  7. ^ 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