Erigeron filifolius |
Erigeron vagus |
|
---|---|---|
threadleaf fleabane |
rambling fleabane |
|
Habit | Plants perennial, 9–40 cm; taprooted, with branching caudices. | Plants perennial, 3–10 cm; taprooted, caudices branching. |
Stems | erect, moderately to densely strigose, eglandular. |
erect, nearly glabrous to remotely hirsute, minutely glandular. |
Basal leaves | persistent, linear to filiform, 20–80 × 0.5–2 mm; margins entire; tips rounded to acute or acuminate; surfaces moderately to densely strigose. |
persistent, spatulate with 3–5 distal lobes, 6–25 × 3–10 mm; margins entire; surfaces moderately to densely hirsute. |
Cauline leaves | gradually reduced distally or not. |
absent or reduced to linear bracts. |
Involucres | 4–6 × 7–11 mm. |
5–7 × 10–13 mm. |
Ray florets | 20–40, white to purple; rays 3–9 × 0.7–1.5 mm. |
25–40, white to lavender to purple; rays 6–9 × 0.5–1.5 mm. |
Disc florets | corollas 2–4 mm. |
2–3 mm. |
Phyllaries | in 2–4 series; surfaces moderately to densely strigose or villous, sometimes nearly glabrous distally, densely minutely glandular. |
in 2 series; purplish to green, with yellow-orange medial stripe; surfaces remotely hirsute to basally villous. |
Fruits | 1–3 mm, sparsely strigose; inner pappi of numerous barbellate bristles. |
2–3 mm, sparsely strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–5 in corymb-like arrays, radiate. |
1, radiate. |
2n | =18. |
=18. |
Erigeron filifolius |
Erigeron vagus |
|
Distribution | ||
Discussion | Rocky areas, sagebrush, juniper and pine forests. Flowering Apr–Aug. 50–2200 m. BR, BW, Col, ECas, Lava, Owy. CA, ID, NV, WA; north to British Columbia, northeast to MT, southeast to UT. Native. If subspecific taxa were recognized, Oregon specimens would correspond to the typical variety. |
Rocky areas, slopes. Flowering Jun–Aug. 1500–3100 m. BW. CA, NV; southeast to CO. Native. |
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 | ||
Synonyms | Erigeron filifolius var. filifolius, Erigeron filifolius var. robustior | |
Web links |
|