Erigeron simplex(synonym of Erigeron grandiflorus) |
Erigeron elegantulus |
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one-stem fleabane |
dwarf blue fleabane, volcanic fleabane |
|
Habit | Plants perennial, 3–15 cm; fibrous-rooted, rhizomatous, caudices branched or not. | Plants perennial, 4–10 cm; taprooted, with branching caudices. |
Stems | erect, sparsely to moderately villous, eglandular. |
erect to basally ascending, sparsely to moderately strigose, eglandular. |
Basal leaves | persistent, oblanceolate to spatulate, 50–350 × 30–90 mm; margins entire, sometimes moderately ciliate; surfaces glabrous to glabrate. |
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. |
Cauline leaves | obovate to linear, abruptly reduced distally; surfaces usually hirsute. |
abruptly reduced and usually restricted to basal ? of stem, bases sheathing. |
Involucres | 3–7 × 8–16 mm. |
3–5 × 8–11 mm. |
Ray florets | 30–50+, lavender to purple; rays 5–10 × 0.6–2.2 mm. |
15–30, lavender to purple; rays 3–8 × 0.7–1.3 mm. |
Disc florets | 2–3 mm. |
corollas 2.5–3.5 mm. |
Phyllaries | in 2 series; margins usually ragged; surfaces moderately to densely villous. |
in 3–4 unequal series; surfaces sparsely strigose, eglandular. |
Fruits | 1–2 mm, sparsely strigose; inner pappi of numerous barbellate bristles. |
1–2 mm, nearly glabrous to sparsely strigose; inner pappi of numerous barbellate bristles. |
Heads | 1, radiate. |
1, radiate. |
2n | =27. |
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Erigeron simplex |
Erigeron elegantulus |
|
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. |
Rocky areas, sagebrush, coniferous forests. Flowering Jun–Aug. 700–2500 m. BR, BW, Casc, Owy. CA. Native. |
Source | Flora of Oregon, volume 2, page 261 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 256 James Riser, Stephen Meyers |
Sibling taxa | ||
Synonyms | Erigeron grandiflorus | |
Web links |