Senecio aronicoides DC.
Family: Asteraceae
Rayless Ragwort
Senecio aronicoides image
Keir Morse  

Perennials (biennials-), 30-90 cm (caudices buttonlike, roots unbranched, fleshy-fibrous). Herbage loosely and sparsely arachnose to finely tomentose, unevenly glabrescent. Stems single. Leaves progressively reduced distally; petiolate; blades ovate or oblanceolate to oblong, 7-20 × 2-3 cm, bases broadly to narrowly tapered, margins repand-denticulate or sublaciniate to subentire (mid and distal leaves sessile, smaller, weakly clasping). Heads (6-)15-30+ in corymbiform arrays. Calyculi 0 or of 1-3+ oblong to linear bractlets (seldom more than 1.5 mm). Phyllaries ± 8 or ± 13, 4-8 mm, tips green or black. Ray florets 0 or 1-2; corolla laminae 4-7 mm. Cypselae glabrous. 2n = 40.

Flowering spring-early summer. Dry or drying sites in open woodlands, upper foothills and montane forests; 800-2500 m; Calif., Oreg.

Senecio aronicoides image
Keir Morse  
Senecio aronicoides image
Keir Morse  
Senecio aronicoides image
Keir Morse  
Senecio aronicoides image
Barry Breckling  
Senecio aronicoides image
Barry Breckling  
Senecio aronicoides image
Barry Breckling  
Senecio aronicoides image
Barry Breckling