CICHORIA CEA E. 90 1 



the leaves; head 3-5 cm. broad; involucre usually quite glabrous, nearly 25 ram, 

 high; achenes slightly contracted at the summit, about 6 mm. long; pappus of 

 40-50 unequal scales and bristles. In dry soil, on prairies and rocky hills, 111. 

 10 the N. \Y. Terr., south to Xeb. and Kans. April-June. 



19. SITILIAS Raf. [PYRRHOPAPPUS DC] 



Perennial herbs (some species annual ?), with alternate or basal leaves, and mostly 

 large, solitary or few heads of yellow flowers, borne on long, usually bracted pedun- 

 cles. Involucre oblong or campanulate, its principal bracts in I series, nearly equal, 

 slightly united at the base, with several series of smaller outer ones. Rays truncate 

 and 5 -toothed at the summit Anthers sagittate at the base. Style-branches short, 

 obtusish. Achenes oblong or fusiform, mostly 5 -ribbed, roughened or hirsute, 

 abruptly narrowed into a long filiform beak. Pappus of numerous soft simple 

 brownish somewhat unequal bristles, surrounded at the base by a villous white 

 ring. [Name unexplained.] Six known species, of N. Am. and Mex. 



Stem leafy, usually branched; plant glabrous, or nearly so. 1. S. Caroliniana. 



Scape naked, monocephalous; plant hirsute, or pubescent. 2. S. grandiflora. 



1. Sitilias Caroliniana (Walt.) Raf. Leafy Stemmed False Dandelion- 

 (I. F. f. 3551.) Glabrous or nearly so; stem leafy, usually branched, 6-15 dm- 

 high. Basal leaves oblong or oblong-lanceolate, pinnatifid, lobed, coarsely dentate 

 or some of them entire, acute, acuminate, or obtusish, 7-20 cm. long, 1-3 cm. 

 wide, narrowed into margined petioles; stem leaves sessile or partly clasping, the 

 upper usually lanceolate, entire and acuminate; heads 1 or several, 25-35 mm - 

 broad; involucre commonly puberulent or pubescent, its outer bracts setaceous or 

 subulate, spreading, the inner cornicuiate at the apex. In dry fields, Del. to Fla., 

 Mo.. La. and Tex. April-July. 



2. Sitilias grandiflora (Nutt.) Greene. Rough False Dandelion. (I. 

 F. f. 3552.) Hirsute or pubescent. Root tuberous-thickened; leaves all basal, 

 oblong or spatulate in outline, deeply pinnatifid, 7-17 cm. long, 2.5-3.5 cm - wide, 

 narrowed into margined petioles; scape naked or sometimes with a small leaf near 

 its base; head solitary, 3-5 cm. broad; outer bracts of the involucre small, short, 

 subulate, the inner ones obscurely cornicuiate at the tip. On prairies, Kans. to 

 Tex. April-June. 



20. CREPIS L. 



Perennial or annual herbs, with alternate or basal, mostly toothed or pinnatifid 

 leaves, and small or middle-sized heads, usually paniculate or corymbose, of yel- 

 low or orange flowers. Involucre cylindric, campanulate or swollen at the base, its 

 principal bracts in 1 series, equal, with a number of exterior smaller ones. Recep- 

 tacle mostly flat, naked or short-fimbrillate. Rays truncate and 5 -toothed at the 

 apex. Anthers sagittate at the base. Style-branches slender. Achenes linear- 

 oblong, 10-20-ribbed or nerved, not transversely rugose, narrowed at the base and 

 apex, beakless in our species. Pappus copious, of very slender white bristles. 

 [Greek, sandal; application not explained.] About 180 species, of the northern 

 hemisphere. Besides the following, about 10 others occur in western N. Am. 

 Involucre glabrous. 



Involucre cylindric; plant pubescent below; introduced. 1. C. pulchra. 



Involucre campanulate; plant glaucous; native, western. 2. C. glauca. 



Involucre pubescent, glandular, or canescent. 



Foliage not canescent nor scurfy, sometimes hirsute. 



Stem naked, or with 1 or 2 small leaves: western, native. 3. C. runcinata. 



Stems leafy; introduced annuals or biennials. 



Stem leaves narrow, revolute-margined, sessile. 4. C. tectorum. 



Stem leaves lanceolate, clasping, not revolute-margined. 



Involucre 6-8 mm. high; achenes 10-striate. 5. C. virens. 



Involucre 8-12 mm. high: achenes 13-striate. 6. C. biennis. 



Foliage cinereous, canescent, or scurfy, sometimes also hirsute. 



Inner bracts of the involucre 5-8 ; flowers 5-8. 7. C. intermedia. 



Inner bracts of the involucre 9-24; flowers 10-30. 8. C. occidentalism 



i. Crepis pulchra L. Small-flowered Hawksbeard. (I. F. f. 3553.) 

 Annual; stem 6-13 dm. high, leafy and pubescent below, mostly glabrous, naked 

 and paniculately branched above. Stem leaves oblong or oblong -lanceolate, den- 



