Flora of North America species comparison

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Senecio crassulus

mountain meadow butterweed, thick-leaf groundsel, thick-leaf ragwort
Habit Perennials, (15–)20–50(–70) cm (rhizomes branched, ± woody).
Herbage

glabrous.
Stems

1–(2–4).
Leaves

(thickish-turgid) progressively reduced distally; petiolate;

blades broadly lanceolate to subelliptic, 2.5–15 × 1–5 cm, bases tapered, margins sharply dentate to subentire (some teeth callous; mid leaves sometimes larger than proximal; distal leaves sessile, smaller, often clasping).
Ray florets

± 8 or ± 13;

corolla laminae 5–12 mm.
Phyllaries

(± 8) ± 13 or ± 21, 5–9 mm, tips black (villous).
Calyculi

of (1–)3–6 linear to filiform bractlets (lengths to 1/3 phyllaries).
Heads

(1–)4–12 in corymbiform arrays.
Cypselae

glabrous.
2n

= 40.

Senecio crassulus
Phenology Flowering summer.
Habitat Moist to drying hillsides, meadows, other open places in forest associations
Elevation 2200–3700 m (7200–12100 ft)
Distribution
from FNA
CO; ID; MT; NM; NV; OR; SD; UT; WY
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 20, p. 551.
Parent taxa 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. 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
Synonyms S. lapathifolius, S. semiamplexicaulis
Name authority A. Gray: Proc. Amer. Acad. Arts 19: 54. (1883)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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