Erigeron elegantulus |
Erigeron latus |
|
---|---|---|
dwarf blue fleabane, volcanic fleabane |
broad fleabane, Owyhee fleabane |
|
Habit | Plants perennial, 4–10 cm; taprooted, with branching caudices. | Plants perennial, 5–10 cm; taprooted, caudices branching. |
Stems | erect to basally ascending, sparsely to moderately strigose, eglandular. |
erect, sparsely to moderately hirsute, densely 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 to spatulate, 15–50 × 1.3–4.5 mm; margins entire; tips rounded to acute or acuminate; surfaces moderately to densely hirsute to nearly hispid, minutely glandular. |
Cauline leaves | abruptly reduced and usually restricted to basal ? of stem, bases sheathing. |
few, similar to basal, usually abruptly reduced distally. |
Involucres | 3–5 × 8–11 mm. |
6–9 × 13–21 mm. |
Ray florets | 15–30, lavender to purple; rays 3–8 × 0.7–1.3 mm. |
20–35, lavender to purple; rays 6–11 × 1–2 mm. |
Disc florets | corollas 2.5–3.5 mm. |
4–5 mm. |
Phyllaries | in 3–4 unequal series; surfaces sparsely strigose, eglandular. |
in 2–3 series, with dark medial area, sometimes with orange stripe; surfaces sparsely to moderately hispid-hirsute, densely minutely glandular. |
Fruits | 1–2 mm, nearly glabrous to sparsely strigose; inner pappi of numerous barbellate bristles. |
2–4 mm, glabrate to sparsely strigose; inner pappi of numerous barbellate bristles. |
Heads | 1, radiate. |
1, radiate. |
2n | =27. |
|
Erigeron elegantulus |
Erigeron latus |
|
Distribution | ||
Discussion | Rocky areas, sagebrush, coniferous forests. Flowering Jun–Aug. 700–2500 m. BR, BW, Casc, Owy. CA. Native. |
Open areas, sagebrush, streambanks. Flowering May–Jul. 1600–2000 m. Owy. ID, NV. Native. Erigeron latus and E. poliospermus are very similar with the exception of the vestiture of the fruits. Further research is needed to determine if continued recognition of two distinct species is warranted. |
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 | ||
Web links |