W173 



SAWTOOTH BUTTERWEED 



Sene'cio ser'ra 



Flower heads a few rather large (up 

 to % in. long) and numerous smaller 

 ones, erect, in a leafy, broad, often 

 flat-topped, end cluster (paniculate 

 cyme) 



Outside (ray) flowers of head small, 

 yellow, petal-like, female, seed- 

 producing 



Center (disk) flowers of head small, 

 yellow, tubular, perfect, seed-producing 



Bracts in a bell-shaped series (in- 

 volucre) around, flower head; main 

 bracts in one row, equal, linear-lance- 

 shaped, thickened on back, thin-papery 

 along margins, pointed, hairy and dark 

 colored at tips; frequently a few small 

 bracts occurring at base of main bracts 



"Seeds" (achenes) hairless, tipped 

 with many, soft, white, slender bristles 

 (pappus) 



i Leaves alternate, somewhat- erect, 

 t hairless, lance-shaped or egg-shaped, 

 A tapering at the base making leafstalk 

 \ obscure; margins usually saw-toothed, 

 \ sometimes almost entire 



Stem stout, erect, 1M to 6 ft. high, 

 leafy, hairless, commonly branched at 

 top, in clumps 



Rootstock stout, woody, perennial 

 Roots fibrous, rather coarse 



