Erigeron elegantulus |
Erigeron aliceae |
|
---|---|---|
dwarf blue fleabane, volcanic fleabane |
Alice Eastwood's fleabane |
|
Habit | Plants perennial, 4–10 cm; taprooted, with branching caudices. | Plants perennial, 30–70 cm; fibrous-rooted, rhizomatous, caudices sometimes branching. |
Stems | erect to basally ascending, sparsely to moderately strigose, eglandular. |
erect, nearly glabrous or sparsely strigose often becoming more so 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. |
usually persistent, lanceolate to oblanceolate, 50–120 × 10–30 mm; margins entire, sometimes coarsely toothed with 1–5 pairs of teeth; midveins prominent, rarely with 2 prominent veins; surfaces remotely to moderately strigose. |
Cauline leaves | abruptly reduced and usually restricted to basal ? of stem, bases sheathing. |
well developed, lanceolate to narrowly elliptic, 10–80 × 3–14 mm, distally reduced, bases clasping. |
Involucres | 3–5 × 8–11 mm. |
5–7 × 13–17 mm. |
Ray florets | 15–30, lavender to purple; rays 3–8 × 0.7–1.3 mm. |
30–80, white to lavender to purple; rays 4–12 × 1–1.5 mm. |
Disc florets | corollas 2.5–3.5 mm. |
corollas 2–4 mm. |
Phyllaries | in 3–4 unequal series; surfaces sparsely strigose, eglandular. |
in 2–3 series, with dark green medial area; surfaces white woolly-villous, glandular. |
Fruits | 1–2 mm, nearly glabrous to sparsely strigose; inner pappi of numerous barbellate bristles. |
2–3 mm, moderately to densely strigose; inner pappi of numerous barbellate bristles. |
Heads | 1, radiate. |
1–few, radiate. |
2n | =27. |
|
Erigeron elegantulus |
Erigeron aliceae |
|
Distribution | ||
Discussion | Rocky areas, sagebrush, coniferous forests. Flowering Jun–Aug. 700–2500 m. BR, BW, Casc, Owy. CA. Native. |
Meadows, ridges, prairies. Flowering Jun–Sep. 400–2200 m. Casc, CR, ECas, Sisk. CA, WA. Native. This is a variable species that can be confused with Erigeron glacialis. The woolly-villous phyllaries best distinguish E. aliceae from E. glacialis. |
Source | Flora of Oregon, volume 2, page 256 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 252 James Riser, Stephen Meyers |
Sibling taxa | ||
Web links |