Senecio lemmonii A. Gray
Family: Asteraceae
Lemmon's ragwort,  more...
[Senecio decorticans ]
Senecio lemmonii image
Max Licher  
Subshrubs (monocarpic-), (10-)20-100 cm (taproots woody). Herbage glabrous or with tufts of white hairs in leaf axils. Stems usually 1 (branching distally, unevenly reddish, usually somewhat lax). Leaves evenly distributed; petiolate (proximal) or sessile; blades lanceolate to lance-linear, 3-10+ × (0.5-)1-2 cm, bases tapered (or auriculate), margins (sometimes revolute) unevenly dentate to subentire (mid and distal leaves similar, smaller, bases expanded, ± truncate to cordate, clasping). Heads 4-12 in loose, corymbiform arrays. Calyculi of 3-5+ linear to subulate bractlets (to 1.5 mm). Phyllaries ± 21, (4-)5-8 mm, tips often with minute black dots. Ray florets usually ± 8 or ± 13, rarely 0; corolla laminae 8-10 mm. Cypselae hairy. Flowering late winter-early summer. Rocky sites in deserts; 500-1000 m; Ariz.; Mexico. Some young or depauperate specimens of Senecio lemmonii from northern Mexico resemble S. californicus, which occurs farther to the west in California and Baja California. Whether or not there is a relationship between the two is undetermined.

FNA 2006, Wiggins 1964, Kearney and Peebles 1969
Duration: Perennial Nativity: Native Lifeform: Subshrub General: Erect or ascendingly branched perennial from woody taproots, 20-100 cm, herbage glabrous or with tufts of white hairs in leaf axils; stems smooth, unevenly reddish with a more or less deciduous cortex. Leaves: Alternate, evenly distributed, petiolate or sessile, with blades lanceolate to lance-linear, 3-10 cm long, 1-2 cm wide, tapered bases or auriculate, margins unevenly dentate to subentire, smaller leaves have expanded bases which are truncate to cordate and more or less clasping. Flowers: Usually 4-12 flowers in corymbose cymes, radiate, 10-12 mm high, campanulate involucres with small bracts around the calyx, 3-5, linear to subulate; phyllaries 21, 5-8 mm, tips often with minute black dots; 12-18 ray flowers, rays 8-10 mm long, 1.5-2.5 mm wide, spreading but soon curled downward. Fruits: Hairy cypselae, 2.5-3 mm long, subcylindric, weakly 8-10 ribbed and minutely puberulent with short, stiff, ascending, grayish hairs. Ecology: Found on dry hillsides and rock slopes, usually among shrubs from 1,500-3,500 ft (457-1067 m); flowers February-May. Notes: Distinguished by the petiolate to sessile leaves, lanceolate to lance-linear; bases of middle leaves expanding, clasping. The axillary tuft of hair is key. Ethnobotany: Unknown, but other species in this genus has other uses. Etymology: Senecio is from senex, old man, which refers to the gray hairs on the seeds, while lemmonii is named for John Gill Lemmon (1832-1908) an American botanical collector. Synonyms: Senecio decorticans Editor: SBuckley, 2010
Senecio lemmonii image
Max Licher  
Senecio lemmonii image
Max Licher  
Senecio lemmonii image
Max Licher  
Senecio lemmonii image
Sue Carnahan  
Senecio lemmonii image
Ries Lindley  
Senecio lemmonii image
Sue Carnahan  
Senecio lemmonii image
Ries Lindley  
Senecio lemmonii image
Ries Lindley  
Senecio lemmonii image
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