28o 



CICHORIACEAE. 



[Vol. hi. 



I. Crepis pulchra L. Small-flowered 

 Hawksbeard. (Fig. 3553.) 



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



Annual; stem ■3°-^)^° higli, leafy and pubes- 

 cent beloiv, mostly glabrous, naked and panicu- 

 lately branched above. Stem leaves oblong or 

 oblong-lanceolate, dentate, clasping bj- 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, apprcssed; achenes linear, 

 faintly lo-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- 

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



Perennial; scapose, or rarely with i or 2 leaves 

 on the stem, i°-2j<° 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"- 

 12" broad; peduncles glabrous; involucre cam- 

 pauulate, its principal bracts lanceolate, acute, 

 the outer ones very short, ovate, appressed; 

 achenes oblong-cylindric, slightly narrowed 

 above, strongly lo-ribbed. 



In moist and saline soil, Nebraska to the North- 

 west Territory, Nevada and Utah. July-Aug. 



3. Crepis runcinata (Jaiuesj T. &. G. 



Naked Stemmed Hawksbeard. 



(Fig- 3555-) 



Hieracium runcinalum Janies in Long's E-xp. 1:453- 



1823- 

 Crepis runcinata T. &. G. Fl. N. A. 2: 4S7. 1S43. 



Perennial, similar to the preceding species but 

 not glaucous or scarcely so, often pubescent be- 

 low; stem leafless or with i 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, yi'-l}4' 

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

 broad; pedunclesglabrous or glandular-pubescent; 

 in\'olucre campanulate, pubescent or glandular, 

 its principal bracts linear-lanceolate, acute, outer 

 ones short, lanceolate, appressed; achenes linear- 

 oblong, somewhat narrowed above, loribbed. 



In moist soil, Iowa to Manitoba, west to Utah andl 

 Montana. June-July. 



