Erigeron sionis

Erigeron sionis
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Tribe: Astereae
Genus: Erigeron
Species: E. sionis
Binomial name
Erigeron sionis
Cronquist
Synonyms[1]
  • Erigeron flagellaris var. trilobatus Maguire ex Cronquist, syn of var. trilobatus
  • Erigeron proselyticus G.L.Nesom, syn of var. trilobatus

Erigeron sionis is a North American species of flowering plant in the daisy family 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 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]

Varieties[1][2]

References

  1. 1 2 The Plant List, Erigeron sionis Cronquist
  2. 1 2 3 Flora of North America, Erigeron sionis Cronquist, 1947. Zion fleabane
  3. ↑ Biota of North America Program 2014 county distribution map
  4. ↑ Zion Plant List, United States Department of the Interior, National Park Service
  5. ↑ Nesom, Guy L. 1976. A new species of Erigeron (Asteraceae) and its relatives in southwestern Utah. Brittonia 28: 263-272 as Erigeron proselyticus


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