550 COMPOSITAE (COMPOSITE FAMILY) 



Means of control 



Prevent seed development. Crowns of autumn plants should be 

 hoe-cut or spudded from their roots, and flower-stalks should be 

 cut in their first bloom. In cultivated ground the necessary tillage 

 will keep the weed suppressed, but plants along roadsides and in 

 waste places should not be allowed to mature fruit to the injury of 

 neighboring land. 



NARROW-LEAVED HAWKSBEARD 

 Crepis tectdrum, L. 



Introduced. Annual. Propagates by seeds. 



Time of bloom : June to August. 



Seed-time : July to September. 



Range : New York and New Jersey, westward to Ontario, Michigan, 



and Nebraska. 

 Habitat : Fields and waste places. 



A smaller and more slender plant than the preceding, with stem 

 one to two feet in height, branching from the base, differing also 

 in that stalk and foliage are finely downy. Basal and lower leaves 

 narrowly lance-shaped, with pointed, slim, backward-turning lobes, 

 the edges of leaves and lobes revolute ; upper leaves nearly linear, 

 entire, sessile, sometimes slightly auriculate and clasping at base, 

 the margins revolute. Heads numerous, loosely clustered, bright 

 yellow, nearly an inch broad, on slender, hairy peduncles ; involucre 

 also downy, with lance-shaped, equal bracts. Achenes spindle- 

 shaped, narrowest at apex, with ten roughened ribs and copious, 

 soft, white pappus. 



Measures for suppression the same as for Smooth Hawksbeard. 



ROUGH HAWKSBEARD 

 Crepis biennis, L. 



Introduced. Biennial. Propagates by seeds. 



Time of bloom: June to August. 



Seed-time : July to September. 



Range: New England to Pennsylvania, westward to Michigan. 



Habitat: Fields and waste places. 



