902 FLORA. 



tate, clasping by an auricled base or truncate, pubescent, 7-10 cm. long, acute or 

 obtuse; basal leaves runcinate, narrowed into petioles; heads very numerous, about 

 6 mm. broad, in a large naked panicle; involucre narrow, cylindric, glabrous, 

 about I cm. high, its principal bracts 12-15, linear, acuminate, the outer ones very 

 short, ovate, appressed ; achenes linear, faintly 10-nerved. Along railroad near 

 Culpepper, Va. Nat. or adventive from Europe. May-July. 



2. Crepis glauca (Nutt.) T. & G. Glaucous Hawksbeard. (I. F. f. 

 3554.) Perennial; scapose, or rarely with 1 or 2 leaves on the stem, 3-7 dm. 

 high, glabrous and glaucous throughout. Basal leaves spatulate, oblanecolate, or 

 obovate, gradually narrowed into margined petioles, entire, dentate, or pinnatifid, 

 5-15 cm. long, 1-2 cm. wide; heads not numerous, long-peduncled, 12-25 mm - 

 broad; peduncles glabrous; involucre campanulate, its principal bracts lanceolate, 

 acute, the outer ones very short, ovate, appressed; achenes oblong-cylindr.c. 

 strongly 10-ribbed. In moist and saline soil, Neb. to the N. W. Terr., Nev. and 

 Utah. July-Aug. 



3. Crepis runcinata (James) T. & G. Naked-stemmed Hawksbeard. 

 (I. F. f. 3555-) Perennial, similar to the preceding species but not glaucous or 

 scarcely so, often pubescent below; stem leafless or with 1 or 2 small leaves, 

 3-9 dm. high. Basal leaves spatulate, obovate, or oblong, obtuse or acute, entire, 

 repand, dentate, or rarely runcinate-pinnatifid, 5-15 cm. long, 2-3 cm. wide; 

 heads several, long-peduncled, nearly 25 mm. broad; involucre campanulate, its 

 principal bracts linear-lanceolate, acute, outer ones short, lanceolate, appressed; 

 achenes linear-oblong, 10-ribbed. In moist soil, Iowa to Manitoba, west to Utah 

 and Mont. June-July. 



4. Crepis tectorum L. Narrow-leaved Hawksbeard. (I. F. f. 3556.) 

 Annual; stem slender, puberulent or pubescent, leafy, branched, 3-6 dm. high. 

 Basal leaves lanceolate, dentate, or runcinate-pinnatifid, 10-15 cm. long; stem leaves 

 sessile, sometimes slightly sagittate at the base, linear, entire, dentate, or lobed; 

 heads numerous, corymbose, 12-20 mm. broad; involucre narrowly campanulate. 

 canescent or pubescent, 6-10 mm. high, its principal bracts lanceolate, acuminate, 

 downy within, the exterior ones linear, spreading; achenes 10-ribbed, the ribs 

 minutely scabrous. In waste places and in ballast, N. J. to Conn., Out., Mich, 

 and Neb. June-July. 



5. Crepis virens L. Smooth Hawksbeard. (I. F. f. 3557.) Annual; 

 stem corymbosely branched above, glabrous or somewhat hirsute below, 3-7 dm. 

 high. Basal leaves spatulate. pinnatifid, or dentate, sometimes 2 dm. long and 

 5 cm. wide, narrowed into petioles; stem leaves lanceolate or oblong, clasping by a 

 sagittate base, flat, the upper mostly very small avid usually entire; heads numer- 

 ous, 10-16 mm. broad, slender-peduncied; involucre oblong, 6-8 mm. high, its 

 principal bracts lanceolate, glabrous within, the outer mostly appressed; achenes 

 10-ribbed, smooth. In fields and waste places, Conn., N. Y., N. J. and Penn. 

 and in ballast about the seaports. Also on the Pacific Coast. Adventive froi 

 Europe. Very variable. July-Sept. 



6. Crepis biennis L. Rough Hawksm:ard. (I. F. f. 3558.) Biennial, 01 

 sometimes annual; stem pubescent or hirsute, leafy, at least below, branched 

 above. 6-9 dm. high. Leaves runcinate-pinnatifid. usually hirsute, 5-15 cm. lone, 

 oblong or spatulate. the lower and basal ones narrowed into petioles and sometimes 

 merely dentate; heads several, subcorymbose, 2-4 cm. broad; involucre canescent 

 or pubescent, 8-12 mm. high, its principal bracts linear-lanceolate, downy within, 

 the outer ones linear-oblong or lanceolate, spreading; achenes oblong, 13-striate, 

 glabrous. In waste places, Vt., Penn., and in ballast about the seaports. Nat. or 

 adventive from Europe. June-Aug. 



7. Crepis intermedia A. Gray. Small-flowered Gray Hawksbeard. 

 (I. F. f. 3559.) Perennial, cinereous puberulent or scurfy; stem rather slender, 

 1-3-leaved, 3-6 dm. high, naked and branched above. Basal leaves lanceolate or 

 oblong-lanceolate, laciniate-pinnatifid, long-acuminate at the apex, narrowed at 

 the base, 10-15 cm. loner ; stem leaves lanceolate, sessile, less divided; heads sev- 

 eral, 12 iS mm. broad; involucre oblong-campanulate, its principal bracts 5-8, 

 lanceolate or linear oblong, canescent, acutish. the outer ones few and short; 

 achenes oblong, strongly 10-ribbed. In dry soil, western Neb. and Colo, to Cal. 

 and Br. Col. May-Sept. 



