CICHORIACEAE. .. 90 1 



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

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

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

 to the N. W. Terr., south to Neb. and Kans. April-June. 



19. SITILIAS Raf. 



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. i. 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 dnv 

 high. Basal leaves oblong or oblong-lanceolate, pinnatihd, 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 i or several, 25-35 mm - 

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

 subulate, spreading, the inner corniculate 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 corniculate 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 I 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. io-2O-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. i. 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 i 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 lo-striate. 5. C. virens. 



Involucre 8-12 mm. high; achenes i3-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.occidcntalis. 



i. Crepis piilchra 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- 



