Erigeron chrysopsidis |
Erigeron philadelphicus |
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dwarf yellow fleabane |
Philadelphia fleabane |
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Habit | Plants perennial, 3–20 cm; taprooted, usually with many woody, branching caudices. | Plants annual, biennial, or short-lived perennial, 10–80 cm; roots fibrous, caudices usually simple. |
Stems | erect; hirsute, eglandular to minutely glandular. |
erect, sparsely to moderately hirsute to lanate, minutely glandular. |
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. |
withering by flowering, oblanceolate to nearly spatulate, 20–170 × 5–35 mm; margins nearly entire, coarsely serrate, lobulate, or shallowly dentate; surfaces slightly to moderately strigose or hirsute, eglandular. |
Cauline leaves | abruptly reduced to (0)1–3 linear bracts. |
oblanceolate to lanceolate to elliptic or oblong, 5–130 × 3–25 mm, distally reduced, bases clasping; surfaces eglandular. |
Involucres | 4–7 × 10–16 mm. |
3–6 × 6–15 mm. |
Ray florets | 20–60; corollas with well-developed yellow rays, 4–8 × 0.5–2 mm, or tubular and short, or rays lacking. |
150–250, white to pink; rays 2–7 × 0.2–0.5 mm. |
Disc florets | corollas 4–5 mm. |
corollas 2–3 mm. |
Phyllaries | in 2–3 series, sparsely to moderately hispid-villous, often minutely glandular. |
in 2–3 series; surfaces sparsely to moderately hirsute, minutely glandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of numerous barbellate bristles. |
1–1.5 mm, sparsely to moderately strigose; inner pappi of numerous barbellate bristles. |
Heads | 1, radiate or disciform. |
(1)3–many in corymb-like arrays, radiate. |
2n | =18. |
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Erigeron chrysopsidis |
Erigeron philadelphicus |
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Distribution | ||
Discussion | Western United States. 3 varieties. |
Disturbed areas, streambanks, fields, meadows, forest openings. Flowering Apr–Sep. 0–1900 m. All ecoregions. CA, ID, NV, WA; nearly worldwide. Native. |
Source | Flora of Oregon, volume 2, page 254 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 260 James Riser, Stephen Meyers |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Erigeron philadelphicus var. philadelphicus | |
Web links |