COMPOSITAE (COMPOSITE FAMILY) 649 



Means of control 



Prevention of seeding by persistent, frequent cutting. In cul- 

 tivated ground the necessary tillage destroys the weed. 



SMOOTH HAWKSBEARD 



Crbpis capilldris, Walk. 

 (Crepis rlrens, L.) 



Introduced. Annual or biennial. Propagates by seeds. 



Time of bloom : July to September. 



Seed-time: August to October. 



Range: Atlantic States from New York southward; also on the 



Pacific Coast. 

 Habitat: Fields and waste places. 



Hawksbeards are European weeds, 

 not as yet very widely distributed in 

 this country but noted in their range 

 as " becoming frequent." This species 

 has a stem ten to thirty inches tall, 

 smooth, slender, branching at the 

 top into a loose, corymbose flower- 

 cluster. Basal leaves somewhat re- 

 sembling those of a Dandelion, five 

 to eight inches long, lance-shaped 

 to spatulate, pinnatifid or merely 

 coarsely toothed, narrowing to winged 

 petioles ; stem leaves much smaller, 

 long-pointed, clasping the stem with 

 an auriculate base, the upper ones 

 usually entire. Heads numerous, on 

 very slender peduncles, about a half- 

 inch broad, gold-yellow; involucre 

 cylindric, of one row of equal bracts. 

 Achenes tapering at both ends, 

 ten-ribbed, smooth, without a beak, 

 the pappus a soft, thick, white 

 aigrette attached to the apex. (Fig. 

 381.) 



FIG. 381. Smooth Hawks- 

 beard (Crepis capittaris). X J. 



