Senecio integerrimus |
Senecio taraxacoides |
|||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
lambstongue ragwort, mountain butterweed, one-stem butterweed, tall western groundsel, western groundsel |
dandelion ragwort |
|||||||||||||||||
Habit | Perennials (possibly biennials), (10–)20–70 cm (caudices buttonlike, roots fleshy-fibrous). | Perennials, 5–10(–14) cm (caudices branched, fibrous-rooted). | ||||||||||||||||
Herbage | arachnose, loosely tomentose, or villous (hairs crisped, jointed), glabrescent. |
(sometimes purple-tinged) floccose-tomentose (persistently on abaxial faces of leaves, glabrescent elsewhere). |
||||||||||||||||
Stems | single. |
single or loosely clustered. |
||||||||||||||||
Leaves | progressively reduced distally; ± petiolate; blades elliptic, lanceolate, linear, oblanceolate, rounded-deltate, or suborbiculate, 6–25 × 1–6 cm, bases ± tapered or truncate to cordate, margins entire or ± dentate (distal leaves sessile, bractlike). |
± 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 | usually ± 8 or ± 13, sometimes 0; corolla laminae 6–15(–20) mm (usually yellow, ochroleucous to white in one variety). |
usually ± 13, sometimes fewer or 0; corolla laminae 8–12 mm. |
||||||||||||||||
Phyllaries | usually ± 13 or ± 21, rarely ± 8, (4–)5–12(–15) mm, tips usually black, sometimes green. |
± 13 or ± 21, 7–10 mm, tips green. |
||||||||||||||||
Calyculi | of 1–5+ linear to filiform bractlets (seldom more than 2 mm). |
of 2–5 lance-linear bractlets (lengths 1/3–2/3 phyllaries). |
||||||||||||||||
Heads | 6–20(–40+) in corymbiform arrays (peduncle of terminal head often shorter than others). |
1(–5). |
||||||||||||||||
Cypselae | usually glabrous, sometimes hirtellous (mostly on angles). |
glabrous. |
||||||||||||||||
2n | = 40, 80. |
= 40. |
||||||||||||||||
Senecio integerrimus |
Senecio taraxacoides |
|||||||||||||||||
Phenology | Late summer. | |||||||||||||||||
Habitat | Alpine peaks | |||||||||||||||||
Elevation | 3500–4000 m (11500–13100 ft) | |||||||||||||||||
Distribution |
CA; CO; IA; ID; KS; MN; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; SK
|
CO; NM |
||||||||||||||||
Discussion | Varieties 5 (5 in the flora). The varieties of Senecio integerrimus are distinguished by morphology and geography. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|||||||||||||||||
Key |
|
|||||||||||||||||
Source | FNA vol. 20, p. 556. | FNA vol. 20, p. 551. | ||||||||||||||||
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio | ||||||||||||||||
Sibling taxa | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Synonyms | S. amplectens var. taraxacoides, Ligularia taraxacoides | |||||||||||||||||
Name authority | Nuttall: Gen. N. Amer. Pl. 2: 165. (1818) | (A. Gray) Greene: Pittonia 4: 119. (1900) | ||||||||||||||||
Web links |
|