Flora of North America species comparison

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Senecio multidentatus

Senecio lyonii

Huachuca Mountain ragwort

island senecio, Lyon's ragwort
Habit Subshrubs or shrubs, (20–)40–150 cm (taproots woody).
Herbage

sparsely hairy, unevenly glabrate (usually with persistent tomentum in leaf axils and on abaxial leaf faces).
Stems

usually multiple (arching upwards).
Leaves

evenly distributed (proximal withering before flowering);

sessile or obscurely petiolate;

blades ± oblong or elliptic, (4–)6–10(–12) × 1.5–3 cm (1–2-pinnatifid, lobes ± linear, 1–2 mm wide), bases ± linear, ultimate margins entire.
Ray florets

± 13;

corolla laminae 8–10 mm.
Phyllaries

(± 13) ± 21, (5–)6–8 mm, tips minutely black.
Calyculi

0 or of 1–3+ (inconspicuous) bractlets.
Heads

4–12 in cymiform arrays (involucres campanulate, 8–15 mm diam.).
Cypselae

hairy.
2n

= 40.

Senecio multidentatus

Senecio lyonii
Phenology Flowering spring.
Habitat Ocean bluffs, open hillsides
Elevation 0–500 m (0–1600 ft)
Distribution
from FNA
AZ; Mexico
[BONAP county map]
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (1 in the flora).

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

Of conservation concern.

Senecio lyonii is known from the Channel Islands (off the coast of southern California) and south.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 567. FNA vol. 20, p. 560.
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. 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. 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. multidentatus var. huachucanus
Name authority Schultz-Bipontinus ex Hemsley: Biol. Cent.-Amer., Bot. 2(10): 243. (1881) A. Gray: in A. Gray et al., Syn. Fl. N. Amer. ed. 2, 1(2): 454. (1886)
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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