| Helianthella | |
|---|---|
| |
| Helianthella castanea | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Subfamily: | Asteroideae |
| Tribe: | Heliantheae |
| Subtribe: | Enceliinae |
| Genus: | Helianthella Torr. & A.Gray |
| Type species | |
| Helianthella uniflora (lectotype)[1][2] (Nutt.) Torr. & A. Gray.
| |
Helianthella, the little sunflower, is a genus of North American plants in the family Asteraceae.[3]
- Helianthella californica A.Gray - California, Nevada, Oregon
- Helianthella castanea Greene - San Francisco Bay region
- Helianthella ciliata S.F.Blake - Chihuahua[6]
- Helianthella durangensis B.L.Turner - Durango
- Helianthella gypsophila B.L.Turner - Nuevo León, Coahuila
- Helianthella mexicana A.Gray - San Luis Potosí, Zacatecas, etc.
- Helianthella microcephala (A.Gray) A.Gray - Arizona, New Mexico, Colorado, Utah
- Helianthella parryi A.Gray - Arizona, New Mexico, Colorado, Utah
- Helianthella quinquenervis (Hook.) A.Gray - from Coahuila to Oregon + Montana
- Helianthella uniflora (Nutt.) Torr. & A.Gray - from New Mexico to British Columbia
References[edit]
- ^ Weber, W. A. 1952. The genus Helianthella (Compositae). American Midland Naturalist 48: 1–35.
- ^ Tropicos, Helianthella Torr. & A. Gray
- ^ Torrey, John, & Asa Gray. 1842. A flora of North America :containing abridged descriptions of all the known indigenous and naturalized plants growing north of Mexico, arranged according to the natural system 2(2): 333–334
- ^ Flann, C (ed) 2009+ Global Compositae Checklist
- ^ Biota of North America Program 2013 county distribution maps
- ^ The International Plant Names Index
External links[edit]
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction