Difference between revisions of "Senecio cannabifolius"
Linnaea 6: 242. 1831.
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|name=Jacobaea cannabifolia | |name=Jacobaea cannabifolia | ||
|authority=(Lessing) E. Wiebe | |authority=(Lessing) E. Wiebe | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Senecio palmatus | |name=Senecio palmatus | ||
|authority=Pallas ex Ledebour | |authority=Pallas ex Ledebour | ||
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}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Senecioneae;Senecio;Senecio cannabifolius | |hierarchy=Asteraceae;Asteraceae tribe Senecioneae;Senecio;Senecio cannabifolius | ||
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name=Senecio cannabifolius | name=Senecio cannabifolius | ||
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|authority=Lessing | |authority=Lessing | ||
|rank=species | |rank=species | ||
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|publication year=1831 | |publication year=1831 | ||
|special status= | |special status= | ||
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|tribe=Asteraceae tribe Senecioneae | |tribe=Asteraceae tribe Senecioneae | ||
|genus=Senecio | |genus=Senecio | ||
Latest revision as of 19:59, 5 November 2020
Perennials, (50–)100–150+ cm (rhizomes fibrous-rooted). Herbage unevenly tomentose, glabrescent, except persistently hairy on abaxial faces of leaves. Stems single. 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). Heads 20–50 in corymbiform arrays. Calyculi 0 or of 1–5+ subulate bractlets (lengths about 1/3 phyllaries). Phyllaries ± 13, 4–6 mm, tips green. Ray florets ± 5; corolla laminae ca. 10 mm. Cypselae glabrous. 2n = 40.
Phenology: Flowering summer.
Habitat: Open meadows and slopes
Elevation: 0–100 m
Distribution
Alaska, Eurasia.
Discussion
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.
Selected References
None.