Erigeron subtrinervis

Erigeron subtrinervis, called the three-nerved daisy,[3] the three-nerve fleabane,[4] or the hairy showy daisy,[4] is a North American species of flowering plants in the daisy family. It grows in various mountains of western Canada and the western United States: Rocky Mountains, northern Cascades, Black Hills, etc., from British Columbia and Washington State east to North Dakota and south as far as New Mexico.[5][3]

Erigeron subtrinervis
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Astereae
Genus:
Erigeron
Species:
E. subtrinervis
Binomial name
Erigeron subtrinervis
Synonyms[1]
  • Erigeron glabellus var. mollis A.Gray
  • Erigeron glabellum var. molle A.Gray[2]
  • Erigeron bakeri Wooton & Standl.
  • Erigeron incanescens Rydb.
  • Erigeron speciosus var. mollis (A.Gray) S.L.Welsh

Erigeron subtrinervis grows in openings and along roadsides in aspen groves and conifer forests, as well as on ridges and mountain peaks at high elevations. It is a perennial herb up to 90 cm (3 feet) tall, producing underground rhizomes and a woody caudex. The inflorescence generally contains 1-21 flower heads per stem, in a flat-topped array. Each head contains 100–150 purple or lavender ray florets surrounding many yellow disc florets.[6]

References
  1. The Plant List, Erigeron subtrinervis Rydb. ex Porter & Britton
  2. Tropicos, Erigeron glabellus var. mollis A. Gray
  3. Turner Photographics, Wildflowers of the Pacific Northwest, Erigeron subtrinervis, Three-Nerved Daisy photos, description, distribution map for Oregon, Washington, and southern British Columbia
  4. Lady Bird Johnson Wildflower Center, University of Texas, Erigeron subtrinervis Rydb. ex Porter & Britton Three-nerve fleabane, Hairy showy daisy
  5. Biota of North America Program 2014 county distribution map
  6. Flora of North America, Erigeron subtrinervis Rydberg ex Porter & Britton, 1894.


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