Senecio wootonii Greene
Family: Asteraceae
Wooton's ragwort,  more...
Senecio wootonii image
Max Licher  
Perennials, (15-)20-45(-60) cm (caudic­es erect or weakly spreading). Herbage nearly always glaucous, glabrous. Stems single or clustered. Leaves (thickish and turgid) progressively reduced distally; petiolate; blades ovate or obovate to lanceolate, 4-9(-15+) × 1.5-3(-4+) cm, bases tapered, margins wavy or subentire (often with callous denticles; mid and distal leaves sessile, bractlike). Heads (3-)8-24+ in corymbiform arrays. Calyculi of 1-3+ oblong to lance-linear bractlets (less than 3 mm). Phyllaries ± 13 (± 21), 6-9 mm, tips green to brownish (not blackened). Ray florets 8-10; corolla laminae 4-10 mm. Cypselae glabrous. 2n = 40. Flowering spring-summer. Damp or drying sites, often in rocky, moderately disturbed sites; 2000-3500 m; Ariz., Colo., N.Mex., Tex.; Mexico. Senecio wootonii reaches its southern limit in Coahuila and Chihuahua, Mexico; farther south, it is replaced by S. toluccanus de Candolle, a similar, larger, more robust species.

FNA 2006, Kearney and Peebles 1969, McDougall 1973
Duration: Perennial Nativity: Native Lifeform: Subshrub General: Herbaceous perennials, to 50 cm tall, stems 1-several, herbage glabrous and somewhat glaucous, with shrubby or branched rhizomes. Leaves: Alternate or basal, thickish and turgid, the basal leaves obovate to oblong or oblanceolate, 2-15 cm long, margins entire to sinuate-dentate, borne on winged petioles, cauline leaves greatly reduced, entire to toothed or lyrate-pinnatifid, short-petioled or sessile and clasping. Flowers: Heads radiate, rays yellow, 8-10, pistillate, 7-8 mm long, the disk flowers yellow, involucres campanulate, row of bracts around outer calyx of 1-3 or more oblong to lance-linear bractlets, these less than 3 mm long, phyllaries 7-9 mm long, glabrous, equal, narrow, sub-herbaceous with green to brownish (but not black) acute to acuminate tips, the heads in groups of 8-24 or more, borne in corymbiform arrays. Fruits: Achenes terete, ribbed, and glabrous. Pappus of numerous, soft, white, capillary bristles. Ecology: Found in damp or drying sites, often in rocky, moderately disturbed sites and coniferous forests, from 6,000-11,500 ft (1829-3505 m); flowering May-September. Distribution: Arizona, Colorado, New Mexico, Texas; Mexico. Notes: Look to the radiate heads and glabrous and somewhat glacuous stems to help identify this species. Ethnobotany: Unknown, but other species in the genera have uses. Etymology: Senecio is from senex, old man, which refers to the gray hairs on the seeds, while wootonii is named for Elmer Otis Wooton (1865-1945) curator of the National Herbarium in 1910. Synonyms: Senecio anacletus, Senecio microdontus, Senecio toluccanus var. microdontus Editor: LCrumbacher 2011
Senecio wootonii image
Max Licher  
Senecio wootonii image
Max Licher  
Senecio wootonii image
Max Licher  
Senecio wootonii image
Max Licher  
Senecio wootonii image
Max Licher  
Senecio wootonii image
Max Licher  
Senecio wootonii image
Max Licher  
Senecio wootonii image
Patrick Alexander  
Senecio wootonii image
Patrick Alexander  
Senecio wootonii image
Patrick Alexander  
Senecio wootonii image
Patrick Alexander  
Senecio wootonii image
Patrick Alexander  
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
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Senecio wootonii image
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Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image
Senecio wootonii image