Erigeron robustior

Erigeron robustior
Conservation status
Vulnerable  (NatureServe) [1]
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Erigeron
Species:	E. robustior
Binomial name
Erigeron robustior (Cronquist) G.L.Nesom
Synonyms [2]
Erigeron decumbens subsp. robustiorCronquist Erigeron decumbens var. robustior(Cronquist) Cronquist

Erigeron robustior is a North American species of flowering plant in the family Asteraceae known by the common name white cushion fleabane ^[3] or Willamette fleabane. ^[4] It is native to the southwestern Oregon and northern California in the western United States. ^{[5] [4]}

Erigeron robustior grows in rocky or gravely slopes, sometimes in serpentine soil. It is a perennial herb up to 55 centimeters (22 inches) tall, forming a thin tap root, not growing into colonies as do some of the other species in the genus. The inflorescence usually contains one to three flower heads. Each head contains 21–36 white or pink ray florets surrounding many yellow disc florets. ^{[3] [6]}

References

1. NatureServe (2 February 2024). "Erigeron robustior". NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer. Arlington, Virginia: NatureServe. Retrieved 11 February 2024.
2. The Plant List, Erigeron robustior (Cronquist) G.L.Nesom
3. Flora of North America, Erigeron robustior (Cronquist) G. L. Nesom, 2004. White cushion fleabane
4. Calflora taxon report, University of California, Erigeron robustior (Cronq.) Nesom, Willamette fleabane
5. Biota of North America Program 2014 county distribution map
6. Nesom, Guy L. 2004. Sida 21(1): 21-22