Erigeron robustior |
Erigeron simplex(synonym of Erigeron grandiflorus) |
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one-stem fleabane |
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Habit | Plants perennial, 3–15 cm; fibrous-rooted, rhizomatous, caudices branched or not. | |
Stems | erect, sparsely to moderately villous, eglandular. |
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Basal leaves | persistent, oblanceolate to spatulate, 50–350 × 30–90 mm; margins entire, sometimes moderately ciliate; surfaces glabrous to glabrate. |
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Cauline leaves | obovate to linear, abruptly reduced distally; surfaces usually hirsute. |
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Involucres | 3–7 × 8–16 mm. |
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Ray florets | 30–50+, lavender to purple; rays 5–10 × 0.6–2.2 mm. |
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Disc florets | 2–3 mm. |
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Phyllaries | in 2 series; margins usually ragged; surfaces moderately to densely villous. |
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Fruits | 1–2 mm, sparsely strigose; inner pappi of numerous barbellate bristles. |
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Heads | 1, radiate. |
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Erigeron robustior |
Erigeron simplex |
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Distribution | ||
Discussion | Rocky areas, meadows. Flowering Jul–Aug. 2400–3000 m. BW. ID, NV; northeast to MT, east to WY, southeast to CO, NM. Native. |
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Source | Flora of Oregon, volume 2, page 261 James Riser, Stephen Meyers |
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Sibling taxa | ||
Synonyms | Erigeron grandiflorus | |
Web links |
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