R146 



THREADLEAF GROUNDSEL 



Sene'cio longilo'bus, syn. S. filifo'lius 



Flower heads erect, about K in- high, 

 several to many in a loose, somewhat 

 flat-topped end cluster 



Outer (ray) flowers of heads 8 to 18, 

 yellow, petal-like, up to about K in. 

 long, female, seed-producing 



Center (disk) flowers of heads nu- 

 merous, small; yellow, tubular, perfect, 

 seed-producing 



Bracts in a bell-shaped, 1-rowed series 

 (involucre) around flower head, often 

 with a few small bracts at base; each 

 bract linear, keeled, shortly sharp- 

 pointed at tips, tufted-white-woolly- 

 hairy at base 



Stems woody near the base, up to 

 about 40 in. high, permanently white- 

 woolly-hairy, leafy throughout 



Leaves alternate, permanently white- 

 woolly-hairy, pinnately divided into 

 long, linear-threadlike divisions or the 

 upper leaves entire and threadlike 



"Seed" (achene) covered with fine, 

 close-pressed, stiff, whitish hairs, tipped 

 by numerous, long, soft, white hairs 

 (pappus) 



Taproot thickened, woody, perennial 



