Psilactis
Genus of flowering plants in the family Asteraceae
From Wikipedia, the free encyclopedia
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.[5] There are six species within the genus.
.jpg)
| Psilactis | |
|---|---|
| |
| Psilactis asteroides, Otero County, New Mexico | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Subfamily: | Asteroideae |
| Tribe: | Astereae |
| Subtribe: | Symphyotrichinae |
| Genus: | Psilactis A.Gray |
| Type species | |
| Psilactis asteroides[1][2] A.Gray | |
| Species[3] | |
| Synonyms[4] | |
| |
Taxonomy
The genus contains six species: Psilactis asteroides, Psilactis brevilingulata, Psilactis gentryi, Psilactis heterocarpa, Psilactis odysseus, and Psilactis tenuis.[3] Formerly included in the genus were Psilactis coulteri and Psilactis crispa which are now placed in genus Leucosyris as L. coulteri[6] and L. crispa,[7] respectively. Additionally, Psilactis lepta has been determined to be a taxonymic synonym of Psilactis asteroides.[8]
P. asteroides
P. brevilingulata
P. gentryi
P. heterocarpa
.jpg)
.jpg)
.jpg)
_(cropped).jpg)
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.[9] P. odysseus is restricted to the Mexican states Nuevo León and Tamaulipas,[10] and the other four species, P. asteroides,[11] P. brevilingulata,[12] P. gentryi,[13] and P. tenuis[14] have distributions in both Mexico and the United States. P. brevilingulata has an additional presence in Colombia and Peru.[12]