Flora of North America species comparison

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Senecio astephanus

Senecio pattersonensis

San Gabriel ragwort

Mono ragwort, Mount Patterson senecio
Habit Perennials, 40–100 cm (caudices unknown). Perennials, to 10 cm (rhizomes branching).
Herbage

unevenly floccose-lanate or tomentose, glabrescent.

(sometimes reddish-tinged, especially proximally) glabrous.
Stems

single.

1–3 (arching upward).
Leaves

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).

evenly distributed (proximal often withering before flowering); obscurely petiolate or sessile;

blades oblanceolate to lance-linear (sometimes with 1–2 lateral lobes), 2–4 cm × 3–5 mm, bases subdecurrent, weakly clasping, margins entire or wavy (often revolute).
Ray florets

0.

± 8;

corolla laminae 5–10 mm.
Phyllaries

± 21, 7–8 mm, tips greenish.

± 13, 5–7(–8) mm.
Calyculi

of 5–8+ lance-linear to filiform bractlets (lengths 1/3–7/8 phyllaries).

of 3–5+ (inconspicuous) bractlets.
Heads

10–20+ in loose or congested, cymiform arrays.

1(–4).
Cypselae

glabrous.

glabrous.
2n

= 40.

Senecio astephanus

Senecio pattersonensis
Phenology Flowering spring. Flowering summer.
Habitat Steep, rocky slopes Talus slopes
Elevation 400–1500 m (1300–4900 ft) 3000–3700 m (9800–12100 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CA; NV
[BONAP county map]
Discussion

Of conservation concern.

Senecio astephanus is collected infrequently.

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

Of conservation concern.

Senecio pattersonensis has the aspect of a depauperate S. fremontii with notably narrow leaves. Some plants in collections appear to be intergrades with S. spartioides.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 553. 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. 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. 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. 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. revolutus
Name authority Greene: Pittonia 1: 174. (1888) Hoover: Leafl. W. Bot. 5: 60. (1947)
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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