Steviopsis

Steviopsis
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Supertribe: Helianthodae
Tribe: Eupatorieae[1]
Genus: Steviopsis
R.M.King & H.Rob.
Type species
Eupatorium adenospermum[2]
Sch.Bip.

Steviopsis is a genus of Mexican plants in the boneset tribe within the sunflower family.[2][3][4]

Description

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

The genus was originally described by King and Robinson[2] as part of the splitting of Eupatorium into monophyletic units. The distinctiveness and circumscription of the genus were recently assessed using molecular phylogenetic approaches [5][6]

Species[1][7]
  1. Steviopsis amblyolepis (B.L.Rob.) R.M.King & H.Rob. - Guerrero, Morelos, Michoacán
  2. Steviopsis arsenei R.M.King & H.Rob. - Michoacán
  3. Steviopsis dryophila (B.L.Rob.) B.L.Turner - Jalisco, Nayarit, Zacatecas, Sinaloa
  4. Steviopsis nesomii B.L.Turner - Nuevo León
  5. Steviopsis rapunculoides (DC.) R.M.King & H.Rob. - Jalisco, Guanajuato, Nayarit, Morelos, Michoacán
  6. Steviopsis vigintiseta (DC.) R.M.King & H.Rob. - Oaxaca, Puebla, Morelos, México State
formerly included[1]

see Asanthus Brickelliastrum Dyscritogyne

  • Steviopsis adenosperma - Dyscritogyne adenosperma
  • Steviopsis dryophila - Dyscritogyne dryophila
  • Steviopsis fendleri - Brickelliastrum fendleri
  • Steviopsis squamulosa - Asanthus squamulosus
  • Steviopsis thyrsiflora - Asanthus thyrsiflorus
  • Steviopsis thyrsiflora var. solidaginifolia - Asanthus solidaginifolius

References

  1. ↑ 1.0 1.1 1.2 Flann, C (ed) 2009+ Global Compositae Checklist
  2. ↑ 2.0 2.1 2.2 King, Robert Merrill & Robinson, Harold Ernest. 1971. Studies in the Eupatorieae (Asteraceae) LIX. A new genus, Steviopsis. Phytologia 22: 156-157
  3. ↑ 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.
  4. ↑ Tropicos, Steviopsis R.M. King & H. Rob.
  5. ↑ Schilling, E. E., J. L. Panero, B. S. Crozier & P. Davila. 2013. Relationships of Asanthus (Asteraceae, Eupatorieae). Systematic Botany 38: 253-258.
  6. ↑ Turner, Billie Lee. 1988. Phytologia 64: 259-262
  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