Erigeron rydbergii |
Erigeron cascadensis |
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Cascade fleabane |
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Habit | Plants perennial, 5–20 cm; taprooted with with woody, branching caudices. | |
Stems | ascending to erect, mostly glabrous to sparsely hirsute, sparsely minutely glandular. |
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Basal leaves | persistent in distinct rosettes, obovate to spatulate, 10–90 × 5–15 mm; margins entire or occasionally weakly dentate on distal portions; surfaces glabrous to remotely strigose, occasionally remotely glandular. |
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Cauline leaves | elliptic to oblanceolate, 7–25 × 2–6 mm, reduced distally. |
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Inflorescences | 1–3 heads; terminal and axillary. |
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Involucres | 3–8 × 9–15 mm. |
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Ray florets | 30–50, white to occasionally purplish; rays 4–7 × 1–2 mm. |
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Disc florets | corollas 3–4 mm. |
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Phyllaries | in 2–3 series, often with purple medial or apical area; surfaces nearly glabrous or sparsely to moderately villous, eglandular or glandular. |
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Fruits | 2–3 mm, sparsely strigose; inner pappi of numerous barbellate bristles. |
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Heads | radiate. |
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Erigeron rydbergii |
Erigeron cascadensis |
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Distribution | ||
Discussion | Shaded rocky slopes, cliffs, crevices, outcrops. Flowering May–Aug. 1200–2200 m. Casc. Native. Endemic to Oregon. This species is endemic to rocky areas in the Cascades from Douglas and Klamath counties only as far north as Marion County. |
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Source | Flora of Oregon, volume 2, page 253 James Riser, Stephen Meyers |
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Sibling taxa | ||
Web links |