Erigeron elegantulus |
Erigeron tener |
|
---|---|---|
dwarf blue fleabane, volcanic fleabane |
slender fleabane |
|
Habit | Plants perennial, 4–10 cm; taprooted, with branching caudices. | Plants perennial, 3–15 cm; taprooted, caudices branching. |
Stems | erect to basally ascending, sparsely to moderately strigose, eglandular. |
erect, sparsely strigose, sometimes minutely glandular. |
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, narrowly oblanceolate-elliptic to spatulate, 5–50 × 1–4 mm; margins entire; tips acute; surfaces densely strigose. |
Cauline leaves | abruptly reduced and usually restricted to basal ? of stem, bases sheathing. |
few, linear, 5–20 × ~1 mm, abruptly reduced distally. |
Involucres | 3–5 × 8–11 mm. |
3–5 × 7–11 mm. |
Ray florets | 15–30, lavender to purple; rays 3–8 × 0.7–1.3 mm. |
15–24, blue to purple; rays 3–6 × 0.5–1 mm. |
Disc florets | corollas 2.5–3.5 mm. |
corollas 2–4 mm. |
Phyllaries | in 3–4 unequal series; surfaces sparsely strigose, eglandular. |
medial areas usually purple; surfaces glabrous to moderately hirsute, densely glandular. |
Fruits | 1–2 mm, nearly glabrous to sparsely strigose; inner pappi of numerous barbellate bristles. |
1–3 mm, sparsely strigose; inner pappi of numerous barbellate bristles. |
Heads | 1, radiate. |
1(3), radiate. |
2n | =27. |
|
Erigeron elegantulus |
Erigeron tener |
|
Distribution | ||
Discussion | Rocky areas, sagebrush, coniferous forests. Flowering Jun–Aug. 700–2500 m. BR, BW, Casc, Owy. CA. Native. |
Rocky areas, talus, slops, crevices. Flowering May–Aug. 1700–2500 m. BR. CA, ID, NV; northeast to MT, east to WY, southeast to AZ. Native. In Oregon, Erigeron tener is thus far known only from Steens Mountain. |
Source | Flora of Oregon, volume 2, page 256 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 262 James Riser, Stephen Meyers |
Sibling taxa | ||
Web links |