Erigeron oreganus |
Erigeron lonchophyllus |
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Gorge daisy, gorge fleabane, Oregon fleabane |
short-rayed fleabane, spear-leaved fleabane |
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Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants biennial or short-lived perennial, 4–33 cm; usually fibrous-rooted, caudices simple. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
erect, sparsely to densely hirsute, eglandular or occasionally with densely minute glands. |
Basal leaves | persistent, obovate, 15–90 × 5–20 mm; margins coarsely serrate to shallowly lobulate; surfaces sparsely to moderately hirsute to strigose. |
persistent, oblanceolate to spatulate, 10–100 × 4–10 mm; margins entire, often with spreading cilia; surfaces glabrous to moderately hirsute or strigose. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
narrowly elliptic, oblong, oblanceolate to linear, 10–100 × 1–5 mm, reduced distally, bases often clasping; surfaces glabrous to moderately hirsute or strigose. |
Involucres | 4–7 × 9–15 mm. |
4–7 × 5–11 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
40–100, white to pink; rays 2–5 × 0.2–0.4 mm. |
Disc florets | corollas 3–5 mm. |
corollas 3–5 mm. |
Phyllaries | in 2–3 series, pale green with dark green medial stripe; surfaces remotely hirsute, strongly stipitate-glandular. |
in 2–3 series; surfaces sparsely to densely hirsute, glandular or eglandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of several unbarbed to weakly barbellate twisted bristles. |
1.5–2.5 mm, sparsely to moderately strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–4, radiate. |
1–10 in raceme-like arrays, radiate. |
2n | =18. |
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Erigeron oreganus |
Erigeron lonchophyllus |
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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. |
Floodplains, lakesides, gravel bars, roadsides, marshes, seeps. Flowering Jun–Aug. 800–2300 m. BR, BW, Casc, ECas, Lava, Owy. CA, ID, NV, WA; north to AK, northeast to Nunavut, east to Quebec, southeast to NM. Native. |
Source | Flora of Oregon, volume 2, page 259 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 258 James Riser, Stephen Meyers |
Sibling taxa | ||
Synonyms | Trimorpha lonchophylla | |
Web links |
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