Erigeron poliospermus

Erigeron poliospermus is a species of flowering plant in the daisy family known by the common names gray-seeded fleabane[1] and purple cushion fleabane.[2] It has been found in British Columbia, Washington, Oregon, and Idaho.[3]

Erigeron poliospermus
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Astereae
Genus:
Erigeron
Species:
E. poliospermus
Binomial name
Erigeron poliospermus

Erigeron poliospermus is a small perennial herb rarely more than 15 centimeters (6 inches) tall, producing a woody taproot. The plant generally produces only 1-3 flower heads per stem. Each head has 15–45 pink, purple, or white ray florets surrounding numerous yellow disc florets. The ray florets are lacking in var. disciformis[1][4][5]

Varieties
  • Erigeron poliospermus var. cereus Cronquist - Washington
  • Erigeron poliospermus var. disciformis (Cronquist) G.L.Nesom - Washington, Oregon[6]
  • Erigeron poliospermus var. poliospermus - British Columbia, Washington, Idaho, Oregon

References
  1. Flora of North America, Erigeron poliospermus A. Gray 1884.
  2. "Erigeron poliospermus". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 29 June 2015.
  3. Biota of North America Program 2014 county distribution map
  4. Cronquist, A.J. 1994. Asterales. 5: 1–496. In A.J. Cronquist, A. H. Holmgren, N. H. Holmgren, J. L. Reveal & P. K. Holmgren (eds.) Intermountain Flora. Hafner Pub. Co., New York.
  5. Scoggan, H. J. 1979. Dicotyledoneae (Loasaceae to Compositae). Part 4. 1117–1711 pp. In Flora of Canada. National Museums of Canada, Ottawa.
  6. Nesom, Guy L. 2004. Sida 21(1): 24


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