Erigeron sionis is a North American species of flowering plant in the family Asteraceae known by the common name Zion fleabane.[2] It has been found in the southwestern United States, only in southern Utah. Some of the populations are inside Zion National Park, after which the species is named.[3][4]
| Erigeron sionis | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Erigeron |
| Species: | E. sionis
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| Binomial name | |
| Erigeron sionis | |
| Synonyms[1] | |
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Erigeron sionis grows in shallow soil in open woodlands dominated by pine, juniper, Douglas fir, maple, and oak. It is a perennial, colony-forming herb up to 25 cm (10 inches) tall, spreading by means of stolons running along the surface of the ground. The inflorescence generally contains 1-4 flower heads. Each head contains 22–46 white ray florets surrounding many yellow disc florets.[2][5]
- Erigeron sionis var. sionis
- Erigeron sionis var. trilobatus (Maguire ex Cronquist) S.L.Welsh
References
edit- ^ a b The Plant List, Erigeron sionis Cronquist
- ^ a b c Flora of North America, Erigeron sionis Cronquist, 1947. Zion fleabane
- ^ Biota of North America Program 2014 county distribution map
- ^ Zion Plant List, United States Department of the Interior, National Park Service
- ^ Nesom, Guy L. 1976. A new species of Erigeron (Asteraceae) and its relatives in southwestern Utah. Brittonia 28: 263-272 as Erigeron proselyticus
