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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
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
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 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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