196 Class XIX. Order II. 



lower ones serrate ; branches bearing leafets ; ra- 

 cemes erect ; calyx leaves obtuse. JLit. 



This species differs considerably in its aspect from the pre- 

 ceding. Stem erect, nearly simple, pubescent, especially to- 

 ward the top. Leaves sessile, lance-oval, rough, somewhat 

 hairy. Racemes axillary, crowded, numerous. Flowers small, 

 without beauty. Disc yellow. Ray very short, obscure, white. 

 Dry woods. Cambridge. Perennial. 



234. SENECIO. 

 SENKOIO VULGAKIS. L. Common Groundsel. 



Flowers without ray, scattered ; leaves piunate- 

 sinuate, clasping, toothed. Sm. 



A weed about houses, rubbish, and cultivated grounds, 

 Stem erect, branching, leafy, smooth. Leaves alternate, pinnat- 

 ifid, and toothed, those of the stem clasping. Flowers termin- 

 al} scattered, yellow. Calyx somewhat cylindrical, calyculated, 

 scaly, the scales acute and black at the tip. Flowers floscular, 

 Down sessile, white. All summer. Annual. 



SENEOIO HIERACIFOHUS. Mich. Hawkweed Groundsel. 



Flowers without ray ; leaves clasping, oblong, 

 acute, unequally torn and serrated ; calyxes oblong, 

 smooth, bristly at base. 



A rank, tall, annual plant. Stem three feet high, fleshy, 

 succulent, branching at top. Leaves large, clasping the stem, 

 deeply and irregularly divided, and acutely toothed. Flowers 

 terminal, erect, crowded. Calyx cylindrical, its base swelling, 

 and invested with many small leaves or bristles. "Florets small, 

 pale, gradually filling the calyx. The whole plant has a strong, 

 nauseous odour. Road sides. August, September. Annual. 



