Erigeron divergens |
Erigeron lonchophyllus |
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diffuse daisy, spreading fleabane |
short-rayed fleabane, spear-leaved fleabane |
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Habit | Plants annual or short-lived perennial, 12–50+ cm; taprooted, with short, branching caudices. | Plants biennial or short-lived perennial, 4–33 cm; usually fibrous-rooted, caudices simple. |
Stems | erect, ascending to decumbent, densely pilose to sparsely hirsute, minutely glandular at least distally. |
erect, sparsely to densely hirsute, eglandular or occasionally with densely minute glands. |
Basal leaves | persistent or withering by flowering, spatulate, 20–80 × 5–10 mm; margins entire or with 1–2 coarse teeth; surfaces moderately to densely strigose, usually eglandular. |
persistent, oblanceolate to spatulate, 10–100 × 4–10 mm; margins entire, often with spreading cilia; surfaces glabrous to moderately hirsute or strigose. |
Cauline leaves | numerous and well developed, elliptic, obovate, or linear, 5–30 × 1–4 mm, usually slightly reduced distally; surfaces densely strigose to villous. |
narrowly elliptic, oblong, oblanceolate to linear, 10–100 × 1–5 mm, reduced distally, bases often clasping; surfaces glabrous to moderately hirsute or strigose. |
Involucres | 2–4 × 6–10 mm. |
4–7 × 5–11 mm. |
Ray florets | 75–150, light purple to lavender; rays 2–5 × 0.25–0.6 mm. |
40–100, white to pink; rays 2–5 × 0.2–0.4 mm. |
Disc florets | corollas 2–3 mm. |
corollas 3–5 mm. |
Phyllaries | in 2–3 series, usually with dark green or brown medial area and lighter colored stripe; surfaces moderately to densely hirsute or strigose, moderately to densely glandular. |
in 2–3 series; surfaces sparsely to densely hirsute, glandular or eglandular. |
Fruits | 0.75–1 mm, glabrous to very sparsely strigose; inner pappi of numerous barbellate bristles. |
1.5–2.5 mm, sparsely to moderately strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–20+ in corymb-like arrays, radiate. |
1–10 in raceme-like arrays, radiate. |
2n | =18, 27, 36. |
=18. |
Erigeron divergens |
Erigeron lonchophyllus |
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Distribution | ||
Discussion | Dry open areas, roadsides, streambanks. Flowering May–Sep. 50–2200 m. BR, BW, Casc, Col, ECas, Est, Lava. CA, ID, WA; north to British Columbia, northeast to Alberta, east to SD, southeast to TX, south to Mexico. Native. |
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 255 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 258 James Riser, Stephen Meyers |
Sibling taxa | ||
Synonyms | Erigeron divergens var. divergens | Trimorpha lonchophylla |
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