Erigeron filifolius |
Erigeron ovinus |
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threadleaf fleabane |
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Habit | Plants perennial, 9–40 cm; taprooted, with branching caudices. | |
Stems | erect, moderately to densely strigose, eglandular. |
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Basal leaves | persistent, linear to filiform, 20–80 × 0.5–2 mm; margins entire; tips rounded to acute or acuminate; surfaces moderately to densely strigose. |
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Cauline leaves | gradually reduced distally or not. |
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Involucres | 4–6 × 7–11 mm. |
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Ray florets | 20–40, white to purple; rays 3–9 × 0.7–1.5 mm. |
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Disc florets | corollas 2–4 mm. |
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Phyllaries | in 2–4 series; surfaces moderately to densely strigose or villous, sometimes nearly glabrous distally, densely minutely glandular. |
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Fruits | 1–3 mm, sparsely strigose; inner pappi of numerous barbellate bristles. |
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Heads | 1–5 in corymb-like arrays, radiate. |
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2n | =18. |
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Erigeron filifolius |
Erigeron ovinus |
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Distribution | ||
Discussion | Rocky areas, sagebrush, juniper and pine forests. Flowering Apr–Aug. 50–2200 m. BR, BW, Col, ECas, Lava, Owy. CA, ID, NV, WA; north to British Columbia, northeast to MT, southeast to UT. Native. If subspecific taxa were recognized, Oregon specimens would correspond to the typical variety. |
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Source | Flora of Oregon, volume 2, page 256 James Riser, Stephen Meyers |
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Sibling taxa | ||
Synonyms | Erigeron filifolius var. filifolius, Erigeron filifolius var. robustior | |
Web links |
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