Erigeron chrysopsidis |
Erigeron lonchophyllus |
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dwarf yellow fleabane |
short-rayed fleabane, spear-leaved fleabane |
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Habit | Plants perennial, 3–20 cm; taprooted, usually with many woody, branching caudices. | Plants biennial or short-lived perennial, 4–33 cm; usually fibrous-rooted, caudices simple. |
Stems | erect; hirsute, eglandular to minutely glandular. |
erect, sparsely to densely hirsute, eglandular or occasionally with densely minute glands. |
Basal leaves | persistent in dense clusters, linear to narrowly oblanceolate, 10–80 × 1–3 mm; margins entire with hispid hairs; surfaces hirsute to hispid, sometimes nearing strigose. |
persistent, oblanceolate to spatulate, 10–100 × 4–10 mm; margins entire, often with spreading cilia; surfaces glabrous to moderately hirsute or strigose. |
Cauline leaves | abruptly reduced to (0)1–3 linear bracts. |
narrowly elliptic, oblong, oblanceolate to linear, 10–100 × 1–5 mm, reduced distally, bases often clasping; surfaces glabrous to moderately hirsute or strigose. |
Involucres | 4–7 × 10–16 mm. |
4–7 × 5–11 mm. |
Ray florets | 20–60; corollas with well-developed yellow rays, 4–8 × 0.5–2 mm, or tubular and short, or rays lacking. |
40–100, white to pink; rays 2–5 × 0.2–0.4 mm. |
Disc florets | corollas 4–5 mm. |
corollas 3–5 mm. |
Phyllaries | in 2–3 series, sparsely to moderately hispid-villous, often minutely glandular. |
in 2–3 series; surfaces sparsely to densely hirsute, glandular or eglandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of numerous barbellate bristles. |
1.5–2.5 mm, sparsely to moderately strigose; inner pappi of numerous barbellate bristles. |
Heads | 1, radiate or disciform. |
1–10 in raceme-like arrays, radiate. |
2n | =18. |
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Erigeron chrysopsidis |
Erigeron lonchophyllus |
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Distribution | ||
Discussion | Western United States. 3 varieties. |
Floodplains, lakesides, gravel bars, roadsides, marshes, seeps. Flowering Jun–Aug. 800–2300 m. BR, BW, Casc, ECas, Lava, Owy. CA, ID, NV, WA; north to AK, northeast to Nunavut, east to Quebec, southeast to NM. Native. |
Source | Flora of Oregon, volume 2, page 254 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 258 James Riser, Stephen Meyers |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Trimorpha lonchophylla | |
Web links |
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