558 COMPOSITAE (COMPOSITE FAMILY) 
Two other species of Hawkweed are becoming abundant in 
eastern Canada and northern New York and New England. Both 
promptly named “King Devils” by the farmers whom they vic- 
timize. Hierdcium floribindum, increasing by numerous stolons 
and also by flowering branches at the base; a smooth and glaucous 
plant except that the spatulate leaves are bristly on the margins, 
and sometimes on midrib and veins beneath. Heads in large 
dense corymbs, yellow, with blackish involucres. Aterdcium 
florentinum, springing from a short stout rootstock, with smooth, 
spatulate basal leaves or sometimes sparsely bristly beneath, the 
scape often nearly two feet tall with manyheaded yellow corymb. 
Means of control 
Prevent seed production and distribution by close cutting of 
flowering stalks while in early bloom. Cultivation of the soil 
destroys the perennial roots. Like the Orange Hawkweed these 
plants may be suppressed in grasslands by the use of salt. 
