Compilation
Erigeron purpuratus

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Name

Identification
Erigeron denalii A.Nelson [family ASTERACEAE ] (stored under name); Verified by Not on sheet, Erigeron purpuratus Greene [family ASTERACEAE ] Verified by Hultén, E.,
Related name
  • Erigeron denalii
  • Erigeron uniflorus
  • Erigeron purpuratus
  • Erigeron not on sheet
Common name
  • Denali fleabane, Flora of North America Vol. 20
  • Purple fleabane, Flora of North America Vol. 20

Flora

Entry for Erigeron purpuratus Greene [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 20,
Names
Erigeron purpuratus Greene [family COMPOSITAE], Pittonia, 4: 155. 1900
Treatment Author(s)
Guy L. Nesom
Information
Perennials, (2–)3–9(–14) cm; taprooted, caudices diffuse with extensive systems of rhizomelike, relatively long and slender branches. Stems erect (simple, ± scapiform), villous, minutely glandular. Leaves mostly basal (persistent); blades linear to narrowly oblanceolate, 15–30(–45) × 1–2.5(–3) mm, margins entire or (mostly on early leaves) with 1–2 shallow lateral lobes or teeth, faces sparsely hirsuto-villous or glabrous, minutely glandular. Heads 1. Involucres 6–9(–10) × 9–15 mm. Phyllaries in 2–3 series, sparsely pilose (hairs 1–3 mm, with colored cross walls) or glabrous, minutely glandular. Ray florets 40–90; corollas white to pink or purplish, 5–9 mm, laminae (filiform, 0.3–0.8 mm wide, involute) erect, not coiling or reflexing. Disc corollas 4–5 mm. Cypselae 1.8–2.7 mm, 2-nerved, faces sparsely strigillose to glabrate; pappi: outer 0 (or inconspicous), inner of 28–40 (pinkish to purplish) bristles. 2n = 18.
Phenology
jun-aug (summer)
Altitude range
100–1400 m;
Distribution
USA Alaska.Canada Yukon
Discussion
The erect, involute ray laminae of Erigeron purpuratus, E. denalii, and E. pallens distinguish them from other species of sect. Tridactylia. Distinctions among these species were studied by G. L. Nesom and D. F. Murray (2004).

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