Erigeron elegantulus |
Erigeron glacialis var. glacialis(synonym of Erigeron ursinus) |
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dwarf blue fleabane, volcanic fleabane |
peregrine fleabane, subalpine fleabane |
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Habit | Plants perennial, 4–10 cm; taprooted, with branching caudices. | Plants perennial, 20–50 cm; fibrous-rooted, often rhizomatous, caudices usually simple. |
Stems | erect to basally ascending, sparsely to moderately strigose, eglandular. |
erect, nearly glabrous, or sparsely hirsute proximally to densely strigillose or pilose distally, eglandular. |
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. |
persistent, linear-oblanceolate to broadly oblanceolate, 30–150 × 8–30 mm; margins entire; surfaces glabrous, eglandular. |
Cauline leaves | abruptly reduced and usually restricted to basal ? of stem, bases sheathing. |
lanceolate to oblanceolate, 10–80 × 3–30 cm, reduced distally, bases occasionally clasping; surfaces glabrous. |
Involucres | 3–5 × 8–11 mm. |
5–8 × 12–15 mm. |
Ray florets | 15–30, lavender to purple; rays 3–8 × 0.7–1.3 mm. |
30–60, lavender to purple; rays 5–9 × 1.5–4 mm. |
Disc florets | corollas 2.5–3.5 mm. |
corollas 4–6 mm. |
Phyllaries | in 3–4 unequal series; surfaces sparsely strigose, eglandular. |
in 2–3 series, with dark medial area, glabrous, densely glandular. |
Fruits | 1–2 mm, nearly glabrous to sparsely strigose; inner pappi of numerous barbellate bristles. |
2–4 mm, sparsely to moderately strigose; inner pappi of numerous barbellate bristles. |
Heads | 1, radiate. |
1(4), radiate. |
2n | =27. |
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Erigeron elegantulus |
Erigeron glacialis var. glacialis |
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Distribution | ||
Discussion | Rocky areas, sagebrush, coniferous forests. Flowering Jun–Aug. 700–2500 m. BR, BW, Casc, Owy. CA. Native. |
Meadows, streamsides, lakeshores, bogs. Flowering Jun–Sep. 800–3200 m. BR, BW, Casc, CR, ECas. CA, ID, NV, WA; north to AK, northeast to Alberta, east to WY, 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 peregrinus ssp. callianthemus, Erigeron peregrinus var. angustifolius, Erigeron peregrinus var. callianthemus, Erigeron peregrinus var. eucallianthemus, Erigeron peregrinus var. scaposus, Erigeron ursinus | |
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