Senecio amplectens |
Senecio neowebsteri |
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alpine groundsel, showy alpine ragwort |
Olympic Mountain ragwort |
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Habit | Perennials, (5–)10–60 cm (rhizomatous or with branched caudices). | Perennials, 7–15(–20+) cm (rhizomes fibrous-rooted). | ||||
Herbage | (often purplish-tinged) glabrous or sparsely and unevenly hairy, especially near leaf axils and among heads, usually glabrescent. |
(sometimes purplish-tinged) floccose-tomentose, unevenly glabrescent. |
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Stems | single or loosely clustered. |
single or loosely clustered (erect or arching). |
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Leaves | usually progressively reduced distally (basal sometimes smaller than proximal or mid leaves); petiolate (petioles shorter than to equaling blades, often clasping); blades broadly lanceolate or lanceolate to oblanceolate, (5–)10–20+ × 2–4(–5+) cm, bases tapered, margins dentate to denticulate (distal leaves smaller, bractlike). |
mostly cauline; petiolate (petioles about equaling blades); blades lanceolate or oblanceolate to ovate, (2–)4–8+ × 1.5–3 cm, bases tapered, margins denticulate (distal leaves smaller, lanceolate or linear-lanceolate, bractlike). |
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Ray florets | usually ± 13, sometimes fewer; corolla laminae (10–)15–25 mm. |
± 13; corolla laminae ± 15 mm. |
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Phyllaries | ± 13 or ± 21, tips often black or brownish (sometimes with scattered black hairs). |
usually ± 21, sometimes ± 13, (8–)10–15 mm, tips usually greenish (often sparsely hairy). |
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Calyculi | of 2–5+ linear to filiform bractlets (lengths to 1/2 phyllaries). |
of 4–8 lanceolate to lance-linear bractlets (lengths mostly less than 1/2 phyllaries). |
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Heads | nodding, 1–5(–10). |
nodding, 1(–2). |
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Cypselae | glabrous. |
glabrous. |
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2n | = 40, ca. 175–180. |
= 40. |
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Senecio amplectens |
Senecio neowebsteri |
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Phenology | Flowering late summer–early fall. | |||||
Habitat | High talus slopes | |||||
Elevation | 2200–2600 m (7200–8500 ft) | |||||
Distribution |
CO; MT; NM; NV; UT; WY
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WA
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Discussion | Varieties 2 (2 in the flora). The varieties of Senecio amplectens are distinguished by morphologic tendencies and habitat preferences; there are many intermediates. Where the ranges of the two overlap, var. amplectens occurs at slightly lower elevations than var. holmii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 552. | FNA vol. 20, p. 553. | ||||
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Ligularia amplectens | S. websteri | ||||
Name authority | A. Gray: Amer. J. Sci. Arts, ser. 2, 33: 240. (1862) | S. F. Blake: Leafl. W. Bot. 8: 143. (1957) | ||||
Web links |