28o 



CICHORIACEAE. 



[Voi,. III. 



i. Crepis pulchra L,. Small-flowered 



Hawksbeard. (Fig. 3553-) 

 Crepis pulchra L. Sp. PI. 806. 1753. 



Annual; stem 2-$% high, leafy and pubes- 

 cent below, mostly glabrous, naked and panicu- 

 lately branched above. Stem leaves oblong or 

 oblong-lanceolate, dentate, clasping by an auri- 

 cled base or truncate, pubescent, 3 '-4' long, acute 

 or obtuse, or the uppermost lanceolate, acuminate 

 and entire; basal leaves runcinate, narrowed into 

 petioles; heads very numerous, about 3" broad, 

 in a large naked panicle; involucre narrow, cyl- 

 indric, glabrous, about 5" high, its principal 

 bracts 12-15, linear, acuminate, the outer ones 

 very short, ovate, appressed; achenes linear, 

 faintly 10-nerved, slightly narrowed above. 



Along railroad near Culpepper, Virginia, very 

 abundant in 1890. Naturalized or adventive from 

 Continental Europe. May-July. 



2. Crepis glauca (Nutt.) T. & G. 

 Glaucous Hawksbeard. (Fig. 3554-) 



Crepidium glaucum Nutt. Trans. Am. Phil. Soc. 



(11)7:436. 1841. nn 



Crepis glauca T. & G. Fl. N. A. 2: 488. 1843. 



Perennial; scapose, or rarely with 1 or 2 leaves 

 on the stem, i-2^ high, glabrous and glau- 

 cous throughout. Basal leaves spatulate, oblan- 

 ceolate, or obovate, acute or obtuse at the apex, 

 gradually narrowed into margined petioles, en- 

 tire, dentate, or pinnatifid, 2 / -6 / long, %,'-\' 

 wide; heads not numerous, long-peduncled, 6 7/ - 

 I2 // broad; peduncles glabrous; involucre cam- 

 panulate, its principal bracts lanceolate, acute, 

 the outer ones very short, ovate, appressed; 

 achenes oblong-cylindric, slightly narrowed 

 above, strongly 10-ribbed. 



In moist and saline soil, Nebraska to the North- 

 west Territory, Nevada and Utah. July-Aug. 



Crepis runcinata (James) T. &. 

 Naked Stemmed Hawksbeard. 



(Fig- 3555-) 



G. 



Hieracium runcinatum James in Long's Exp. 1: 453. 



1823. 

 Crepis runcinata T. &. G. Fl. N. A. 2: 487. 1843. 



Perennial, similar to the preceding species but 

 not glaucous or scarcely so, often pubescent be- 

 low; stem leafless or with 1 or 2 small leaves, i- 

 3 high. Basal leaves spatulate, obovate, or ob- 

 long, obtuse or acute, entire, repand, dentate, or 

 rarely runcinate-pinnatifid, 2 / -6 / long, Yz'-iYz' 

 wide; heads several, long-peduncled, nearly i / 

 broad ; peduncles glabrous or glandular-pubescent; 

 involucre carupanulate, pubescent or glandular, 

 its principal bracts linear-lanceolate, acute, outer 

 ones short, lanceolate, appressed; achenes linear- 

 oblong, somewhat narrowed above, 10-ribbed. 



In moist soil, Iowa to Manitoba, west to Utah and- 

 Montana. June-July. 



