Erigeron filifolius |
Erigeron klamathensis(synonym of Erigeron breweri) |
|
---|---|---|
threadleaf fleabane |
Klamath fleabane |
|
Habit | Plants perennial, 9–40 cm; taprooted, with branching caudices. | Plants perennial, 5–25 cm; taprooted, caudices branching. |
Stems | erect, moderately to densely strigose, eglandular. |
erect to decumbent-ascending; hirsute, eglandular; hairs usually spreading and slightly reflexed. |
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. |
withering by flowering. |
Cauline leaves | gradually reduced distally or not. |
oblong to narrowly oblanceolate, 10–30 × 1–4 mm, slightly reduced distally or not; margins entire; surfaces moderately to densely hirsute, eglandular. |
Involucres | 4–6 × 7–11 mm. |
4–6 × 8–14 mm. |
Ray florets | 20–40, white to purple; rays 3–9 × 0.7–1.5 mm. |
20–40, lavender to purple; rays 4–6 × 0.7–2 mm. |
Disc florets | corollas 2–4 mm. |
corollas 3.5–5 mm. |
Phyllaries | in 2–4 series; surfaces moderately to densely strigose or villous, sometimes nearly glabrous distally, densely minutely glandular. |
in 2–3 unequal series; surfaces glabrous to very sparsely hirsute, densely minutely glandular. |
Fruits | 1–3 mm, sparsely strigose; inner pappi of numerous barbellate bristles. |
2–3 mm, sparsely to densely strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–5 in corymb-like arrays, radiate. |
1–4 in loose corymb-like arrays, radiate. |
2n | =18. |
|
Erigeron filifolius |
Erigeron klamathensis |
|
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, ridges, crevices. Flowering Jun–Sep. 500–1500 m. Sisk. CA. Native. |
Source | Flora of Oregon, volume 2, page 256 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 258 James Riser, Stephen Meyers |
Sibling taxa | ||
Synonyms | Erigeron filifolius var. filifolius, Erigeron filifolius var. robustior | Erigeron breweri, Erigeron breweri var. klamathensis |
Web links |
|