Erigeron aureus |
|
---|---|
alpine yellow fleabane, golden daisy, golden fleabane |
|
Habit | Perennials, 1–15 cm; fibrous-rooted, caudices usually simple, rarely branched. |
Stems | erect to basally ascending, villoso-hirsute to ascending-strigose, minutely and inconspicuously glandular. |
Leaves | basal (persistent) and cauline; blades spatulate to oblanceolate-spatulate, 15–60 × 3–13 mm, cauline reduced distally, becoming bractlike, margins entire, faces finely hirsuto-villous to loosely strigose, eglandular. |
Involucres | (5–)6–8 × 8–15 mm. |
Ray florets | 30–50(–68); corollas yellow, 6–9(–10) mm, laminae tardily coiling. |
Disc corollas | 3–3.8 mm. |
Phyllaries | in 2–3 series (purple), sparsely to densely woolly-villous (at least margins), sparsely minutely glandular. |
Heads | 1. |
Cypselae | 1.6–2 mm, 2-nerved, faces loosely strigose; pappi: outer of setae, inner of 14–25 bristles. |
2n | = 18. |
Erigeron aureus |
|
Phenology | Flowering Jun–Aug(–Sep). |
Habitat | Ridges, crevices, talus and other rocky slopes, alpine tundra |
Elevation | (1500–)1600–2700 m ((4900–)5200–8900 ft) |
Distribution |
WA; AB; BC
|
Discussion | Erigeron aureus var. acutifolius has leaves apically acute (versus rounded to broadly obtuse, sometimes emarginate, in the typical form) and is known only from the type locality, a peat bog in British Columbia (Peace River District). It was not listed or otherwise recognized in a recent flora of that province (G. W. Douglas et al. 1998–2002, vol. 1). Erigeron ×arthurii B. Boivin was described as “sp. nov.” and was noted to have originated as a hybrid between E. acris and E. aureus. It was treated by E. H. Moss and J. G. Packer (1983) as a hybrid. Specimens cited by Boivin are from widely separated localities in southwestern British Columbia and adjacent Alberta. It was included at specific rank in the treatment by A. C. Budd et al. (1987) but not by H. J. Scoggan (1978–1979, part 4) or G. W. Douglas et al. (1998–2002, vol. 1). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 323. |
Parent taxa | Asteraceae > tribe Astereae > Erigeron |
Sibling taxa | |
Synonyms | Haplopappus brandegeei, E. aureus var. acutifolius |
Name authority | Greene: Pittonia 2: 1691891 |
Web links |