Senecio taraxacoides |
Senecio fremontii |
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dandelion ragwort |
dwarf mountain butterweed, dwarf mountain ragwort, Fremont's groundsel, Fremont's ragwort |
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Habit | Perennials, 5–10(–14) cm (caudices branched, fibrous-rooted). | Perennials, 10–30(–40) cm (perennating bases subrhizomatous, spreading, sometimes knotty-woody). | ||||||||||||
Herbage | (sometimes purple-tinged) floccose-tomentose (persistently on abaxial faces of leaves, glabrescent elsewhere). |
(often purple-tinged) glabrous. |
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Stems | single or loosely clustered. |
clustered (arching upward to semiprostrate). |
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Leaves | ± evenly distributed; petiolate; blades oblanceolate to ovate, (1–)2–6 × 1–2.5 cm, bases tapered, margins dentate or incised to subpinnatifid (distal leaves bractlike). |
evenly distributed or smaller and fewer distally (somewhat stiffish-succulent when fresh, proximalmost and distalmost often smaller, bractlike); petiolate; blades ovate or obovate to oblanceolate, 2–5(–7) × 1–3(–4) cm, bases ± truncate to tapered, margins laciniate to dentate or subentire. |
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Ray florets | usually ± 13, sometimes fewer or 0; corolla laminae 8–12 mm. |
± 8; corolla laminae 8–12 mm. |
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Phyllaries | ± 13 or ± 21, 7–10 mm, tips green. |
(± 8) ± 13 (± 21), 5–12 mm, tips green or brownish. |
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Calyculi | of 2–5 lance-linear bractlets (lengths 1/3–2/3 phyllaries). |
0 or of 1–5+ usually lance-deltate to linear, sometimes foliaceous, bractlets (lengths mostly 1/5–1/2 phyllaries). |
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Heads | 1(–5). |
1–5+. |
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Cypselae | glabrous. |
glabrous or strigose-hirtellous, at least on angles. |
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2n | = 40. |
= 40, 40+, 80. |
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Senecio taraxacoides |
Senecio fremontii |
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Phenology | Late summer. | |||||||||||||
Habitat | Alpine peaks | |||||||||||||
Elevation | 3500–4000 m (11500–13100 ft) | |||||||||||||
Distribution |
CO; NM |
CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; BC
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Discussion | Varieties 4 (4 in the flora). The varieties are distinguished by morphologic tendencies plus their geographic ranges. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 551. | FNA vol. 20, p. 564. | ||||||||||||
Parent taxa | ||||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Synonyms | S. amplectens var. taraxacoides, Ligularia taraxacoides | S. ductoris | ||||||||||||
Name authority | (A. Gray) Greene: Pittonia 4: 119. (1900) | Torrey & A. Gray: Fl. N. Amer. 2: 445. (1843) | ||||||||||||
Web links |
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