lambstongue ragwort, mountain butterweed, one-stem butterweed, tall western groundsel, western groundsel
|
bashful ragwort
|
Perennials (possibly biennials), (10–)20–70 cm (caudices buttonlike, roots fleshy-fibrous). |
Perennials or biennials (possibly winter annuals), 50–80 cm (caudices fibrous-rooted). |
arachnose, loosely tomentose, or villous (hairs crisped, jointed), glabrescent. |
glabrous. |
single. |
usually single, sometimes loosely clustered. |
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 narrowly lanceolate to oblanceolate, 8–15(–20+) × (0.5–)1–3(–4) cm, bases tapered, margins entire or dentate (mid and distal leaves sessile, bractlike). |
usually ± 8 or ± 13, sometimes 0; corolla laminae 6–15(–20) mm (usually yellow, ochroleucous to white in one variety). |
0. |
usually ± 13 or ± 21, rarely ± 8, (4–)5–12(–15) mm, tips usually black, sometimes green. |
usually ± 13, rarely ± 8, 5–9 mm, tips green. |
of 1–5+ linear to filiform bractlets (seldom more than 2 mm). |
of 2–6 lance-linear bractlets. |
6–20(–40+) in corymbiform arrays (peduncle of terminal head often shorter than others). |
nodding, (3–)8–16(–40+) in racemiform or paniculiform arrays. |
usually glabrous, sometimes hirtellous (mostly on angles). |
glabrous. |
= 40, 80. |
|
|
|
|
|
|
Flowering summer–early autumn. |
|
Rocky, damp or drying hillsides, often coniferous and aspen woodlands |
|
2400–3800 m (7900–12500 ft) |
CA; CO; IA; ID; KS; MN; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; SK
|
CO; NM; UT |
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.) |
|
1. Basal leaves with distinct petioles, blades usually ovate to rounded-deltate, sometimes obovate to oblanceolate; ray corollas white or ochroleucous | var. ochroleucus |
1. Basal leaves with or without distinct petioles, blades elliptic, lanceolate, oblanceolate, rounded-deltate, sublinear, or suborbiculate; ray corollas yellow (or rays 0) | → 2 |
2. Herbage glabrous or glabrate at flowering (except in leaf axils and among heads); phyllaries linear-subulate, tips usually green, minutely (if at all) black | var. integerrimus |
2. Herbage usually arachnose, tomentose, or villous at flowering; phyllaries lanceolate to linear-subulate, tips black (if minutely so, then narrowly lanceolate and broader than subulate) | → 3 |
3. Basal and proximal leaves oblong or lanceolate to sublinear; heads 3–6(–16+); phyllaries 10–15+ mm | var. scribneri |
3. Basal and proximal leaves mostly elliptic to oblanceolate, sometimes elliptic or rounded-deltate to suborbiculate; heads usually 6–15(–30+; if fewer than 6, leaves lanceolate or broader); phyllaries 5–12 mm. | → 4 |
4. Plants copiously arachnose, tomentose, or villous at flowering; phyllaries linear-subulate, 8–12 mm, tips minutely, if at all, blackened | var. major |
4. Plants copiously to sparsely arachnose, tomentose, or villous at flowering; phyllaries mostly lanceolate (seldom as narrow as linear-subulate), 5–10 mm, tips black | var. exaltatus |
|
|
FNA vol. 20, p. 556. |
FNA vol. 20, p. 550. |
Asteraceae > tribe Senecioneae > Senecio |
Asteraceae > tribe Senecioneae > Senecio |
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. 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. 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. cernuus, Ligularia pudica |
Nuttall: Gen. N. Amer. Pl. 2: 165. (1818) |
Greene: Pittonia 4: 118. (1900) |
| |