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4% 3 Senecio L. 
Perennial herbs with horizontal rootstocks, the stems erect, the 
basal leaves commonly long-petioled, the upper stem leaves being much reduced, 
sessile and of different form, less often similar but smaller, always alternate. 
Heads rarely solitary, commonly in terminal subumbellate and crowded or more 
open corymbs, their involucral bracts subequal, erect, cammonly in one, some- ; 
times 2 dissimilar series; receptacle flat, naked. Flowers yellow, the ray =/ 
flowers few, irregular in number, lax, often wanting, pistillate and fertile 
when present. Achenes columnar, 5-10 ribbed, bearing a copious soft white 
pappus . 
O Heads mostly solitary, rarely more than 3 
2 Bracts 14-15 mm. long, in two dissimilar series |, Se megacephalus 
2 Bracts 5-6 mm. long, in a single series 4 S+_subnudus 
= ; 
O Heads few to numerous, arranged in corymbs see i 
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