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

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]
  • Erigeron sionis var. sionis
  • Erigeron sionis var. trilobatus (Maguire ex Cronquist) S.L.Welsh

References

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