320 CLASS XIX. ORDER II. 



oval, obtuse, mucronated, three nerved ; flowers dioe- 

 cious. 



This species flowers early, and is pretty common in pastures 

 and dry hills. The whole plant is at first covered with white, 

 cotton-like down. The root sends out a number of runners fur- 

 nished with oval leaves, exceeding the rest considerably in size, 

 rounded at the end, and tapering into a footstalk. Their upper 

 surface is at first downy, but becomes nearly glabrous, and of a 

 dark brown color. Stem leaves oblong, woolly, sessile. Stem 

 undivided, terminating in a simple corymb of white, woolly 

 flowers ; barren florets Avhite with revolute segments, anthers 

 brownish. Fertile flowers on separate plants, cylindrical. — 

 April, May. — Perennial. 



Gnaphalium uLiGiNosuM. L. Cuclwecd. 



Stein herbaceous, branching, diffuse, woolly ; leaves 

 linear-lanceolate, narrowed at both ends, downy; 

 flowers terminal, crowded. Willd. 



A small, branching, whitish plant. Stems spreading, subdi- 

 vided, covered with white, woolly down. Leaves alternate, 

 linear-lanceolate, less woolly than the stem. Flowers in dense, 

 terminal corymbs or heads. Scales of the calyx yellowish. 

 Road sides. — August. — Annual. 



342. CHRYSANTHEMUM. 

 Chrysanthemum leucanthemum. Ij. Wliite Weed. 



Leaves clasping, oblong, blunt, cut, pinnatifid at 

 base ; the radical ones on footstalks, obovate. Sm. 



This plant, Avhich has come to us, no doubt from Europe, is 

 exceedingly frequent and troublesome in pastures and mowing 

 land. Stems about two feet high, round, furrowed. Lower 

 leaves petioled, inversely ovate, serrate, and cut ; upper ones 

 sessile, irregularly pinnatifid and toothed. Flowers terminal, 

 solitary, large, and flat. Calyx closely imbricated. Disc yel- 

 low; ray white, consisting of many oval, oblong ligules, ending 

 in three teeth. — June, July. — Perennial. 



