Vol. III.] 



CHICORY FAMILY. 



28l 



4. Crepis tectdrum L,. Narrow-leaved 

 Hawksbeard. (Fig. 3556.) 



Crepis tectorum L. Sp. PI. 807. 1753. 



Annual ; stem slender, puberulent or pubescent, 

 leafy, branched, i-2 high. Basal leaves lanceo- 

 late, dentate, or runcinate-pinnatifid, 4'-6^ long; 

 stern leaves sessile, sometimes slightly sagittate at 

 the base, linear, entire, dentate, or lobed, their mar 

 gins revolute; heads numerous, corymbose, 6 // -io // 

 broad; involucre narrowly campanulate, canescent 

 or pubescent, 3 // -5 // high, its principal bracts lan- 

 ceolate, acuminate, downy within, the exterior ones 

 linear, spreading; peduncles usually canescent; 

 achenes 10-ribbed, narrowed above into a short 

 beak, the ribs minutely scabrous. 



In waste places and on ballast, New York and New 

 Jersey to Michigan and Nebraska. June -July. 



5. Crepis virens L,. Smooth 

 Hawksbeard. (Fig. 3557.) 



Crepis virens L. Sp. PI. Ed. 2, 1134. 1763. 



Crepis polytnorpha Wallr. Sched. Crit. 426. 1822. 



Annual; stem stout or slender, leafy, corym- 

 bosely branched above, glabrous or somewhat 

 hirsute below, i-2^ high. Basal leaves spat- 

 ulate, pinnatifid, or dentate, sometimes 8 / long 

 and 2 f wide, narrowed into petioles; stem leaves 

 lanceolate or oblong, clasping by a sagittate 

 base, flat, the upper mostly very small and usu- 

 ally entire; heads numerous, 5 // -8 // broad, 

 slender-peduncled; peduncles glabrous or glan- 

 dular; involucre oblong, more or less pubescent 

 or glandular, 3 // ~4 // high, its principal bracts 

 lanceolate, glabrous within, the outer mostly 

 appressed; achenes 10-ribbed, smooth, slightly 

 narrowed at both ends. 



In fields and waste places, southern New York, New Jersey and Pennsylvania, and in ballast 

 about the seaports. Also on the Pacific Coast. Adventive from Europe. Very variable. July-Sept. 



6. Crepis biennis L,. Rough 

 Hawksbeard. (Fig. 3558.) 



Crepis biennis L. Sp. PI. 807. 1753. 



Biennial, or sometimes annual; stem pubes- 

 cent or hirsute, leafy, at least below, branched 

 above, 2-3high. Leaves runcinate-pinnatifid, 

 usually hirsute, 2 / -6 / long, oblong or spatulate, 

 the lower and basal ones narrowed into petioles 

 and sometimes merely dentate, the uppermost 

 lanceolate, clasping, their margins not revolute; 

 heads several, subcorymbose, \'-\y 2 ' broad; in- 

 volucre canescent or pubescent, 4 // -6 // high, its 

 principal bracts linear-lanceolate, downy within, 

 the outer ones linear-oblong or lanceolate, 

 spreading; achenes oblong, slightly narrowed 

 above, 13-striate, glabrous. 



In waste places, Vermont, Pennsylvania, and in 

 ballast about the seaports. Naturalized or advent- 

 ive from Europe. June-Aug. 



j &t 



