Psilactis
Display parents3
TaxonPsilactis
AuthorityA.Gray
Synonyms
Type speciesPsilactis asteroides[1][2]
Type species authorityA.Gray
Subdivision ranksSpecies

Psilactis is a genus of North American and South American plants in the tribe Astereae within the family Asteraceae which are known by the common name tansyaster.[3] There are six species within the genus.

Taxonomy

The genus contains six species: Psilactis asteroides, Psilactis brevilingulata, Psilactis gentryi, Psilactis heterocarpa, Psilactis odysseus, and Psilactis tenuis.[4] Formerly included in the genus were Psilactis coulteri and Psilactis crispa which are now placed in genus Leucosyris as L. coulteri[5] and L. crispa,[6] respectively. Additionally, Psilactis lepta has been determined to be a taxonymic synonym of Psilactis asteroides.[7]

Distribution

Five species within the genus have native distribution in Mexico. Psilactis heterocarpa is restricted to Texas in the United States with no Mexican distribution.[8] P. odysseus is restricted to the Mexican states Nuevo León and Tamaulipas,[9] and the other four species, P. asteroides,[10] P. brevilingulata,[11] P. gentryi,[12] and P. tenuis[13] have distributions in both Mexico and the United States. P. brevilingulata has an additional presence in Colombia and Peru.[11]

Citations

  1. ^ Lectotype designated by Pfeiffer, L.K.G. 1874. Nomenclator Botanicus 2(2): 857.
  2. ^ Tropicos, Psilactis A. Gray
  3. ^ USDA 2014.
  4. ^ POWO 2021.
  5. ^ POWO 2021, pp. Psilactis coulteri A.Gray.
  6. ^ POWO 2021, pp. Psilactis crispa Brandegee.
  7. ^ POWO 2021, pp. Psilactis lepta Shinners.
  8. ^ Hassler 2021, Psilactis heterocarpa (R. L. Hartm. & M. A. Lane) D. R. Morgan.
  9. ^ Hassler 2021, Psilactis odysseus (G. L. Nesom) D. R. Morgan.
  10. ^ Hassler 2021, Psilactis asteroides A. Gray.
  11. ^ Hassler 2021, Psilactis brevilingulata Sch. Bip. ex Hemsl..
  12. ^ Hassler 2021, Psilactis gentryi (Standl.) D. R. Morgan.
  13. ^ Hassler 2021, Psilactis tenuis S. Watson.

References