Senecio integerrimus |
Senecio parryi |
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lambstongue ragwort, mountain butterweed, one-stem butterweed, tall western groundsel, western groundsel |
mountain ragwort |
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Habit | Perennials (possibly biennials), (10–)20–70 cm (caudices buttonlike, roots fleshy-fibrous). | Perennials (annuals?), 30–60(–100) cm (apparently taprooted). | ||||||||||||||||
Herbage | arachnose, loosely tomentose, or villous (hairs crisped, jointed), glabrescent. |
viscid-pubescent (reputedly notably odorous). |
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Stems | single. |
single (sometimes branching). |
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Leaves | progressively reduced distally; ± petiolate; blades elliptic, lanceolate, linear, oblanceolate, rounded-deltate, or suborbiculate, 6–25 × 1–6 cm, bases ± tapered or truncate to cordate, margins entire or ± dentate (distal leaves sessile, bractlike). |
evenly distributed (basal and proximal sometimes withering before flowering); weakly petiolate; blades ovate or obovate to suborbiculate, spatulate, or lanceolate, 8–12 × 2–4 cm, bases tapered to truncate, margins dentate (mid and distal leaves similar, triangular-lanceolate, bases truncate, clasping). |
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Ray florets | usually ± 8 or ± 13, sometimes 0; corolla laminae 6–15(–20) mm (usually yellow, ochroleucous to white in one variety). |
± 13; corolla laminae 8–10(–12+) mm. |
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Phyllaries | usually ± 13 or ± 21, rarely ± 8, (4–)5–12(–15) mm, tips usually black, sometimes green. |
± 21, 6–7 mm, tips greenish. |
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Calyculi | of 1–5+ linear to filiform bractlets (seldom more than 2 mm). |
of 5–15+ lanceolate or linear to subulate bractlets (lengths 1/3–7/8+ phyllaries). |
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Heads | 6–20(–40+) in corymbiform arrays (peduncle of terminal head often shorter than others). |
12–30 in corymbiform arrays. |
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Cypselae | usually glabrous, sometimes hirtellous (mostly on angles). |
hairy. |
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2n | = 40, 80. |
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Senecio integerrimus |
Senecio parryi |
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Phenology | Flowering late summer–fall. | |||||||||||||||||
Habitat | Rocky, disturbed sites in desert mountains | |||||||||||||||||
Elevation | 1300–2300 m (4300–7500 ft) | |||||||||||||||||
Distribution |
CA; CO; IA; ID; KS; MN; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; SK
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AZ; NM; TX; Mexico |
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Discussion | Varieties 5 (5 in the flora). The varieties of Senecio integerrimus are distinguished by morphology and geography. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Senecio parryi is infrequently collected and poorly known. In the flora, it is known from trans-Pecos Texas westward to southern Arizona. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 556. | FNA vol. 20, p. 568. | ||||||||||||||||
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio | ||||||||||||||||
Sibling taxa | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Name authority | Nuttall: Gen. N. Amer. Pl. 2: 165. (1818) | A. Gray: in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 103. (1859) | ||||||||||||||||
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