Senecio cannabifolius |
Senecio taraxacoides |
|
---|---|---|
Aleutian ragwort |
dandelion ragwort |
|
Habit | Perennials, (50–)100–150+ cm (rhizomes fibrous-rooted). | Perennials, 5–10(–14) cm (caudices branched, fibrous-rooted). |
Herbage | unevenly tomentose, glabrescent, except persistently hairy on abaxial faces of leaves. |
(sometimes purple-tinged) floccose-tomentose (persistently on abaxial faces of leaves, glabrescent elsewhere). |
Stems | single. |
single or loosely clustered. |
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). |
± 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). |
Ray florets | ± 5; corolla laminae ca. 10 mm. |
usually ± 13, sometimes fewer or 0; corolla laminae 8–12 mm. |
Phyllaries | ± 13, 4–6 mm, tips green. |
± 13 or ± 21, 7–10 mm, tips green. |
Calyculi | 0 or of 1–5+ subulate bractlets (lengths about 1/3 phyllaries). |
of 2–5 lance-linear bractlets (lengths 1/3–2/3 phyllaries). |
Heads | 20–50 in corymbiform arrays. |
1(–5). |
Cypselae | glabrous. |
glabrous. |
2n | = 40. |
= 40. |
Senecio cannabifolius |
Senecio taraxacoides |
|
Phenology | Flowering summer. | Late summer. |
Habitat | Open meadows and slopes | Alpine peaks |
Elevation | 0–100 m (0–300 ft) | 3500–4000 m (11500–13100 ft) |
Distribution |
AK; Eurasia |
CO; NM |
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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 20, p. 569. | FNA vol. 20, p. 551. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Jacobaea cannabifolia, S. palmatus | S. amplectens var. taraxacoides, Ligularia taraxacoides |
Name authority | Lessing: Linnaea 6: 242. (1831) | (A. Gray) Greene: Pittonia 4: 119. (1900) |
Web links |