192 
FIFTEENTH REPORT. 
473. Cardmis lanceolatus, Lin. Bull Thistle. 
Fields. Common. 
474. Adopogon Yirginicuin (Lin.) O. K. Dwarf Dandelion. 
Moist grounds. Frequent. 
475. Tragopogon pratensis, Lin. Goat's Beard. 
Waste grounds. Common. 
476. Taraxacum Taraxacum (Lin.) Karst. Dandelion. 
Fields. Common. 
The herb and the root are commercial drugs employed as altera- 
tives, diuretics and laxatives in hepatic derangements and their 
sequelae. The root is official as Taraxacum. 
477. Lactuca Canadensis, Lin. Wild Lettuce. 
Borders of thickets in damp soil. Rare. 
The leaf is a commercial drug and is employed as a mild 
hypnotic. 
478. Lactuca hirsuta, Muhl. Wild Lettuce. 
Dry' grounds. Common. 
479. Prenanthes alba, Liu. Rattlesnake Root. 
Swamps. Frequent. 
