Erigeron eximius |
Erigeron annuus |
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annual fleabane, eastern daisy fleabane |
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Habit | Plants annual, 40–110 cm; fibrous-rooted or weakly taprooted. | |
Stems | erect, sparsely to moderately hirsute, usually becoming strigose distally, eglandular. |
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Basal leaves | usually withering by flowering, broadly lanceolate to oblanceolate, 50–120 × 5–25 mm; margins coarsely serrate or nearly entire; surfaces sparsely strigose. |
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Cauline leaves | lanceolate, oblanceolate, or oblong, 15–80 × 2–15+ mm, often reduced distally; margins entire to coarsely serrate; surfaces sparsely strigose. |
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Involucres | 3–5 × 5–13 mm. |
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Ray florets | 60–110, white to pale lavender; rays 2–8 × 0.5–1 mm. |
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Disc florets | corollas 2–3 mm. |
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Phyllaries | in 2–3 series, usually with dark medial area, with or without an orangish stripe; surfaces glabrous to sparsely villous, often minutely glandular. |
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Fruits | 1–2 mm, sparsely strigose; disc fruit pappi of numerous barbellate bristles; ray fruit pappi lacking. |
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Heads | 5–many in corymb-like or panicle-like arrays, radiate. |
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2n | =27. |
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Erigeron eximius |
Erigeron annuus |
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Distribution | ||
Discussion | Roadsides, fields, disturbed areas. Flowering Jul–Sep. 0–1000 m. BW, Casc, CR, Est, Lava, WV. CA, ID, WA; scattered in western North America, throughout eastern and midwestern North America; Asia, Europe. Exotic. |
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Source | Flora of Oregon, volume 2, page 252 James Riser, Stephen Meyers |
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Sibling taxa | ||
Web links |
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