Senecio integerrimus |
Senecio astephanus |
|||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
lambstongue ragwort, mountain butterweed, one-stem butterweed, tall western groundsel, western groundsel |
San Gabriel ragwort |
|||||||||||||||||
Habit | Perennials (possibly biennials), (10–)20–70 cm (caudices buttonlike, roots fleshy-fibrous). | Perennials, 40–100 cm (caudices unknown). | ||||||||||||||||
Herbage | arachnose, loosely tomentose, or villous (hairs crisped, jointed), glabrescent. |
unevenly floccose-lanate or tomentose, glabrescent. |
||||||||||||||||
Stems | single. |
single. |
||||||||||||||||
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). |
progressively reduced distally; petiolate; blades elliptic-ovate to lanceolate, 10–20(–30?) × 3–7+ cm, bases tapered, margins dentate to denticulate (teeth cartilaginous; mid leaves similar, sessile, smaller; 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). |
0. |
||||||||||||||||
Phyllaries | usually ± 13 or ± 21, rarely ± 8, (4–)5–12(–15) mm, tips usually black, sometimes green. |
± 21, 7–8 mm, tips greenish. |
||||||||||||||||
Calyculi | of 1–5+ linear to filiform bractlets (seldom more than 2 mm). |
of 5–8+ lance-linear to filiform bractlets (lengths 1/3–7/8 phyllaries). |
||||||||||||||||
Heads | 6–20(–40+) in corymbiform arrays (peduncle of terminal head often shorter than others). |
10–20+ in loose or congested, cymiform arrays. |
||||||||||||||||
Cypselae | usually glabrous, sometimes hirtellous (mostly on angles). |
glabrous. |
||||||||||||||||
2n | = 40, 80. |
= 40. |
||||||||||||||||
Senecio integerrimus |
Senecio astephanus |
|||||||||||||||||
Phenology | Flowering spring. | |||||||||||||||||
Habitat | Steep, rocky slopes | |||||||||||||||||
Elevation | 400–1500 m (1300–4900 ft) | |||||||||||||||||
Distribution |
CA; CO; IA; ID; KS; MN; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; SK
|
CA |
||||||||||||||||
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.) |
Of conservation concern. Senecio astephanus is collected infrequently. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||||||||||||||
Key |
|
|||||||||||||||||
Source | FNA vol. 20, p. 556. | FNA vol. 20, p. 553. | ||||||||||||||||
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio | ||||||||||||||||
Sibling taxa | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Name authority | Nuttall: Gen. N. Amer. Pl. 2: 165. (1818) | Greene: Pittonia 1: 174. (1888) | ||||||||||||||||
Web links |
|