Erigeron elegantulus |
Erigeron speciosus(synonym of Erigeron subtrinervis) |
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dwarf blue fleabane, volcanic fleabane |
showy daisy, showy fleabane |
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Habit | Plants perennial, 4–10 cm; taprooted, with branching caudices. | Plants perennial, 15–75 cm; rhizomatous, fibrous-rooted, caudices branching. |
Stems | erect to basally ascending, sparsely to moderately strigose, eglandular. |
erect; surfaces glabrous to rarely remotely hirsute, sometimes minutely glandular distally. |
Basal leaves | persistent, linear to filiform, 20–50 × 0.5–1 mm, white, bases sheathing; margins entire; tips round to acute or acuminate; surfaces sparsely to moderately strigose. |
usually withering by flowering, oblanceolate to spatulate. |
Cauline leaves | abruptly reduced and usually restricted to basal ? of stem, bases sheathing. |
lanceolate, 20–80 × 5–15 mm, gradually reduced distally, bases ± clasping; margins entire, usually long-ciliate; surfaces glabrous, rarely remotely strigose. |
Involucres | 3–5 × 8–11 mm. |
3–7 × 11–16 mm. |
Ray florets | 15–30, lavender to purple; rays 3–8 × 0.7–1.3 mm. |
40–115+, lavender to purple; rays 7–11 × 0.7–1.5 mm. |
Disc florets | corollas 2.5–3.5 mm. |
2–3 mm. |
Phyllaries | in 3–4 unequal series; surfaces sparsely strigose, eglandular. |
in 2–3+ series, usually with orange stripe; surfaces basally hirsute to villous, occasionally minutely glandular. |
Fruits | 1–2 mm, nearly glabrous to sparsely strigose; inner pappi of numerous barbellate bristles. |
2–3 mm, glabrous to sparsely strigose; inner pappi of numerous barbellate bristles. |
Heads | 1, radiate. |
1–5+ in corymb-like arrays, radiate. |
2n | =27. |
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Erigeron elegantulus |
Erigeron speciosus |
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Distribution | ||
Discussion | Rocky areas, sagebrush, coniferous forests. Flowering Jun–Aug. 700–2500 m. BR, BW, Casc, Owy. CA. Native. |
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. |
Source | Flora of Oregon, volume 2, page 256 James Riser, Stephen Meyers |
Flora of Oregon, volume 2 draft James Riser, Stephen Meyers |
Sibling taxa | ||
Synonyms | Erigeron speciosus var. macranthus, Erigeron speciosus var. speciosus, Erigeron subtrinervis | |
Web links |