Class XIX. Order II. 307 



This plant is the only species common to the two continents. 

 It is distinguished from those previously enumerated by its much 

 larger flowers. Stem flexuous, from one to three feet high. 

 Leaves elliptic or lanceolate, often with a long narrow base, 

 serrate. The upper ones nearly entire. Panicle of large yel- 

 low flowers with from five to ten rays. 



Variety /3. alpina. A few inches in height with obovate or 

 lanceolate, mostly entire leaves, and a few large flowers. 



In woods on the sides of the White mountains. Var. /3, on the 

 alpine summits. The last resembles S. Cambrica of Hudson. 



322. SENECIO, 

 SENECIO VULGARIS. L. Common Groundsel. 



Flowers without raj, scattered ; leaves pinnate- 

 sinuate, clasping, toothed. Sin. 



A weed about houses, rubbish, and cultivated grounds. Stem 

 erect, branching, leafy, smooth. Leaves alternate, pinnatifid, 

 and toothed, those of the stem clasping. Flowers terminal, scat- 

 tered, yellow. Calyx somewhat cylindrical, calyculated, scaly, 

 the scales acute and black at the tip. Flowers floscular. Down 

 sessile, white. All summer. Annual. 



SENECIO HIERACIFOLIUS. 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, called Fire weed in many parts of 

 the interior, from the readiness with which it appears in grounds 

 newly burnt over. 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 invest- 

 ed with many small leaves or bristles. Florets small, pale, 

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

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



SENECIO AUREUS. L. Golden Senecio. 



Flowers radiate ; radical leaves crenate, heart-shaped. 



