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dandelion ragwort

dwarf mountain butterweed, dwarf mountain ragwort, Fremont's groundsel, Fremont's ragwort

Habit Perennials, 5–10(–14) cm (caudices branched, fibrous-rooted). Perennials, 10–30(–40) cm (perennating bases subrhizomatous, spreading, sometimes knotty-woody).
Herbage

(sometimes purple-tinged) floccose-tomentose (persistently on abaxial faces of leaves, glabrescent elsewhere).

(often purple-tinged) glabrous.

Stems

single or loosely clustered.

clustered (arching upward to semiprostrate).

Leaves

± 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).

evenly distributed or smaller and fewer distally (somewhat stiffish-succulent when fresh, proximalmost and distalmost often smaller, bractlike);

petiolate;

blades ovate or obovate to oblanceolate, 2–5(–7) × 1–3(–4) cm, bases ± truncate to tapered, margins laciniate to dentate or subentire.

Ray florets

usually ± 13, sometimes fewer or 0;

corolla laminae 8–12 mm.

± 8;

corolla laminae 8–12 mm.

Phyllaries

± 13 or ± 21, 7–10 mm, tips green.

(± 8) ± 13 (± 21), 5–12 mm, tips green or brownish.

Calyculi

of 2–5 lance-linear bractlets (lengths 1/3–2/3 phyllaries).

0 or of 1–5+ usually lance-deltate to linear, sometimes foliaceous, bractlets (lengths mostly 1/5–1/2 phyllaries).

Heads

1(–5).

1–5+.

Cypselae

glabrous.

glabrous or strigose-hirtellous, at least on angles.

2n

= 40.

= 40, 40+, 80.

Senecio taraxacoides

Senecio fremontii

Phenology Late summer.
Habitat Alpine peaks
Elevation 3500–4000 m (11500–13100 ft)
Distribution
from FNA
CO; NM
[BONAP county map]
from FNA
CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 4 (4 in the flora).

The varieties are distinguished by morphologic tendencies plus their geographic ranges.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Plants (10–)25–40 cm; stems straight or gently arching upward; leaves often to 7 × 3 cm, bases of larger ones weakly clasping; phyllaries (9–)10–12 mm
var. blitoides
1. Plants 10–20+ cm; stems usually arching upward; leaves usually smaller than 4 × 2 cm, bases not clasping; phyllaries 5–10 mm
→ 2
2. Leaf margins notably laciniate or laciniate-toothed (segments sometimes also toothed)
var. inexpectatus
2. Leaf margins toothed or subentire
→ 3
3. Leaves smaller and fewer distally; phyllaries 5–7(–8) mm
var. occidentalis
3. Leaves ± equally developed along stems; phyllaries (7–)8–10 mm
var. fremontii
Source FNA vol. 20, p. 551. FNA vol. 20, p. 564.
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. 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
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. 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
Subordinate taxa
S. fremontii var. blitoides, S. fremontii var. fremontii, S. fremontii var. inexpectatus, S. fremontii var. occidentalis
Synonyms S. amplectens var. taraxacoides, Ligularia taraxacoides S. ductoris
Name authority (A. Gray) Greene: Pittonia 4: 119. (1900) Torrey & A. Gray: Fl. N. Amer. 2: 445. (1843)
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