Erigeron chrysopsidis |
Erigeron aureus |
|
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dwarf yellow fleabane |
golden fleabane |
|
Habit | Plants perennial, 3–20 cm; taprooted, usually with many woody, branching caudices. | Plants perennial, 5–10 cm; fibrous-rooted, with short, usually unbranched caudices. |
Stems | erect; hirsute, eglandular to minutely glandular. |
erect; hirsute to villous, minutely glandular. |
Basal leaves | persistent in dense clusters, linear to narrowly oblanceolate, 10–80 × 1–3 mm; margins entire with hispid hairs; surfaces hirsute to hispid, sometimes nearing strigose. |
persistent, spatulate to oblanceolate, 10–50 × 5–10 mm; margins entire; surfaces moderately to densely strigose, eglandular to minutely glandular. |
Cauline leaves | abruptly reduced to (0)1–3 linear bracts. |
5–10 × 1–5 mm abruptly reduced, often a single linear bract. |
Involucres | 4–7 × 10–16 mm. |
4–6 × 10–15 mm. |
Ray florets | 20–60; corollas with well-developed yellow rays, 4–8 × 0.5–2 mm, or tubular and short, or rays lacking. |
40–60, bright yellow; rays 4–6 × 0.5–1.5 mm. |
Disc florets | corollas 4–5 mm. |
corollas 3–4 mm. |
Phyllaries | in 2–3 series, sparsely to moderately hispid-villous, often minutely glandular. |
in 2–3 series, often purplish colored; surfaces moderately to densely woolly-villous, sparsely glandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of numerous barbellate bristles. |
2–3 mm, moderately strigose; inner pappi of numerous barbellate bristles. |
Heads | 1, radiate or disciform. |
1, radiate. |
2n | =18. |
|
Erigeron chrysopsidis |
Erigeron aureus |
|
Distribution | ||
Discussion | Western United States. 3 varieties. |
Ridges, talus, rocky slopes. Flowering Jul–Aug. 1600–2600 m. BW. WA; north to British Columbia, northeast to Alberta. Native. In Oregon, this native species is currently known only from a single collection in the Eagle Cap Wilderness, Wallowa Mountains. |
Source | Flora of Oregon, volume 2, page 254 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 252 James Riser, Stephen Meyers |
Sibling taxa | ||
Subordinate taxa | ||
Web links |