Erigeron oreganus |
Erigeron aliceae |
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Gorge daisy, gorge fleabane, Oregon fleabane |
Alice Eastwood's fleabane |
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Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants perennial, 30–70 cm; fibrous-rooted, rhizomatous, caudices sometimes branching. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
erect, nearly glabrous or sparsely strigose often becoming more so distally, eglandular. |
Basal leaves | persistent, obovate, 15–90 × 5–20 mm; margins coarsely serrate to shallowly lobulate; surfaces sparsely to moderately hirsute to strigose. |
usually persistent, lanceolate to oblanceolate, 50–120 × 10–30 mm; margins entire, sometimes coarsely toothed with 1–5 pairs of teeth; midveins prominent, rarely with 2 prominent veins; surfaces remotely to moderately strigose. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
well developed, lanceolate to narrowly elliptic, 10–80 × 3–14 mm, distally reduced, bases clasping. |
Involucres | 4–7 × 9–15 mm. |
5–7 × 13–17 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
30–80, white to lavender to purple; rays 4–12 × 1–1.5 mm. |
Disc florets | corollas 3–5 mm. |
corollas 2–4 mm. |
Phyllaries | in 2–3 series, pale green with dark green medial stripe; surfaces remotely hirsute, strongly stipitate-glandular. |
in 2–3 series, with dark green medial area; surfaces white woolly-villous, glandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of several unbarbed to weakly barbellate twisted bristles. |
2–3 mm, moderately to densely strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–4, radiate. |
1–few, radiate. |
Erigeron oreganus |
Erigeron aliceae |
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Distribution | ||
Discussion | Shady cliffs, rocky slopes, crevices. Flowering May–Aug. 100–400 m. Casc. WA. Native. This uncommon species is found only in the Columbia River Gorge. |
Meadows, ridges, prairies. Flowering Jun–Sep. 400–2200 m. Casc, CR, ECas, Sisk. CA, WA. Native. This is a variable species that can be confused with Erigeron glacialis. The woolly-villous phyllaries best distinguish E. aliceae from E. glacialis. |
Source | Flora of Oregon, volume 2, page 259 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 252 James Riser, Stephen Meyers |
Sibling taxa | ||
Web links |