Erigeron speciosus(synonym of Erigeron subtrinervis) |
Erigeron annuus |
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showy daisy, showy fleabane |
annual fleabane, eastern daisy fleabane |
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Habit | Plants perennial, 15–75 cm; rhizomatous, fibrous-rooted, caudices branching. | Plants annual, 40–110 cm; fibrous-rooted or weakly taprooted. |
Stems | erect; surfaces glabrous to rarely remotely hirsute, sometimes minutely glandular distally. |
erect, sparsely to moderately hirsute, usually becoming strigose distally, eglandular. |
Basal leaves | usually withering by flowering, oblanceolate to spatulate. |
usually withering by flowering, broadly lanceolate to oblanceolate, 50–120 × 5–25 mm; margins coarsely serrate or nearly entire; surfaces sparsely strigose. |
Cauline leaves | lanceolate, 20–80 × 5–15 mm, gradually reduced distally, bases ± clasping; margins entire, usually long-ciliate; surfaces glabrous, rarely remotely strigose. |
lanceolate, oblanceolate, or oblong, 15–80 × 2–15+ mm, often reduced distally; margins entire to coarsely serrate; surfaces sparsely strigose. |
Involucres | 3–7 × 11–16 mm. |
3–5 × 5–13 mm. |
Ray florets | 40–115+, lavender to purple; rays 7–11 × 0.7–1.5 mm. |
60–110, white to pale lavender; rays 2–8 × 0.5–1 mm. |
Disc florets | 2–3 mm. |
corollas 2–3 mm. |
Phyllaries | in 2–3+ series, usually with orange stripe; surfaces basally hirsute to villous, occasionally minutely glandular. |
in 2–3 series, usually with dark medial area, with or without an orangish stripe; surfaces glabrous to sparsely villous, often minutely glandular. |
Fruits | 2–3 mm, glabrous to sparsely strigose; inner pappi of numerous barbellate bristles. |
1–2 mm, sparsely strigose; disc fruit pappi of numerous barbellate bristles; ray fruit pappi lacking. |
Heads | 1–5+ in corymb-like arrays, radiate. |
5–many in corymb-like or panicle-like arrays, radiate. |
2n | =27. |
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Erigeron speciosus |
Erigeron annuus |
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Distribution | ||
Discussion | Conifer forests, moist slopes, riverbanks, wet meadows. Flowering Jun–Sep. 50–2500 m. BR, BW, CR, WV. ID, NV, WA; north to British Columbia, northeast to Alberta, east to NE, southeast to NM. Native. |
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. |
Source | Flora of Oregon, volume 2 draft James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 252 James Riser, Stephen Meyers |
Sibling taxa | ||
Synonyms | Erigeron speciosus var. macranthus, Erigeron speciosus var. speciosus, Erigeron subtrinervis | |
Web links |
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