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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
from FNA
AK; Eurasia
[BONAP county map]
from FNA
CO; NM
[BONAP county map]
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 Asteraceae > tribe Senecioneae > Senecio Asteraceae > tribe Senecioneae > Senecio
Sibling taxa
S. actinella, S. amplectens, S. ampullaceus, S. aphanactis, S. arizonicus, S. aronicoides, S. astephanus, S. atratus, S. bigelovii, S. blochmaniae, S. californicus, S. clarkianus, S. crassulus, S. elegans, S. elmeri, S. eremophilus, S. ertterae, S. erucifolius, S. flaccidus, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. jacobaea, S. lemmonii, S. lugens, S. lyonii, S. megacephalus, S. mohavensis, S. multidentatus, S. neowebsteri, S. parryi, S. pattersonensis, S. pseudoarnica, S. pudicus, S. quaylei, S. rapifolius, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. sylvaticus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii
S. actinella, S. amplectens, S. ampullaceus, S. aphanactis, S. arizonicus, S. aronicoides, S. astephanus, S. atratus, S. bigelovii, S. blochmaniae, S. californicus, S. cannabifolius, S. clarkianus, S. crassulus, S. elegans, S. elmeri, S. eremophilus, S. ertterae, S. erucifolius, S. flaccidus, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. jacobaea, S. lemmonii, S. lugens, S. lyonii, S. megacephalus, S. mohavensis, S. multidentatus, S. neowebsteri, S. parryi, S. pattersonensis, S. pseudoarnica, S. pudicus, S. quaylei, S. rapifolius, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. sylvaticus, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii
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)
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