Erigeron robustior

Erigeron robustior is a North American species of flowering plant in the daisy family known by the common name White cushion fleabane[2] or Willamette fleabane.[3] It is native to the southwestern Oregon and northern California in the western United States.[4][3]

Erigeron robustior
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Astereae
Genus:
Erigeron
Species:
E. robustior
Binomial name
Erigeron robustior
Synonyms[1]
  • Erigeron decumbens subsp. robustior Cronquist
  • Erigeron decumbens var. robustior (Cronquist) Cronquist

Erigeron robustior grows in rocky of gravely slopes, sometimes in serpentine soil. It is an 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 1-3 flower heads. Each head contains 21–36 white or pink ray florets surrounding many yellow disc florets.[2][5]

References
  1. The Plant List, Erigeron robustior (Cronquist) G.L.Nesom
  2. Flora of North America, Erigeron robustior (Cronquist) G. L. Nesom, 2004. White cushion fleabane
  3. Calflora taxon report, University of California, Erigeron robustior (Cronq.) Nesom, Willamette fleabane
  4. Biota of North America Program 2014 county distribution map
  5. Nesom, Guy L. 2004. Sida 21(1): 21-22


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