Senecio multidentatus |
Senecio cannabifolius |
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Huachuca Mountain ragwort |
Aleutian ragwort |
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Habit | Perennials, (50–)100–150+ cm (rhizomes fibrous-rooted). | |
Herbage | unevenly tomentose, glabrescent, except persistently hairy on abaxial faces of leaves. |
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Stems | single. |
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Leaves | ± evenly distributed (basal and proximal withering before flowering); mostly petiolate (proximal); blades oblong or ovate to oblong-lanceolate (pinnately or subpalmately parted, primary lobes 3–6+, lanceolate to lance-linear, 3–8+ cm), 10–20+ × 8–15+ cm, bases ± tapered, ultimate margins serrate (distal leaves similar, sessile, smaller). |
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Ray florets | ± 5; corolla laminae ca. 10 mm. |
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Phyllaries | ± 13, 4–6 mm, tips green. |
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Calyculi | 0 or of 1–5+ subulate bractlets (lengths about 1/3 phyllaries). |
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Heads | 20–50 in corymbiform arrays. |
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Cypselae | glabrous. |
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2n | = 40. |
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Senecio multidentatus |
Senecio cannabifolius |
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Phenology | Flowering summer. | |
Habitat | Open meadows and slopes | |
Elevation | 0–100 m (0–300 ft) | |
Distribution |
AZ; Mexico |
AK; Eurasia |
Discussion | Varieties 2 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Senecio cannabifolius barely enters the flora from far-eastern Asia. Infraspecific taxa are recognized within S. cannabifolius in some floras of Asiatic regions; our plants are referable to var. cannabifolius. Senecio cannabifolius has been treated in Jacobaea by E. Wiebe (2000); see discussion under 53. S. jacobaea. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 567. | FNA vol. 20, p. 569. |
Parent taxa | ||
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Jacobaea cannabifolia, S. palmatus | |
Name authority | Schultz-Bipontinus ex Hemsley: Biol. Cent.-Amer., Bot. 2(10): 243. (1881) | Lessing: Linnaea 6: 242. (1831) |
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