CICHORIACEAE. 



VOL. III. 



3. Agoseris cuspidata (Pursh) D. Dietr. 



Prairie False Dandelion. Fig. 4083. 

 Troximon cuspidatum Pursh, Fl. Am. Sept. 742. 1814. 

 Troximon marginatum Nutt. Gen. 2: 128. 1818. 

 Agoseris cuspidata D. Dietr. Syn. PI. 4: 1332. 1847. 



Nothocalais cuspidata Greene, Bull. Cal. Acad (II ) 

 2:55. 1886. 



Leaves linear, long-acuminate, thick, pubescent 

 or glabrate, 4'-%' long, 2."-^' wide, somewhat con- 

 duplicate, their margins conspicuously white-to- 

 mentose and crisped, or entire. Scape stout, to- 

 mentose, at least above, shorter than or equalling 

 the leaves; head i'-2' broad; involucre usually 

 quite glabrous, nearly i' high; achenes slightly 

 contracted at the summit; about 3" long, beakless ; 

 pappus of 40-50 unequal bristles. 



In dry soil, on prairies and rocky hills, Illinois to 

 North Dakota, Nebraska, Kansas and Colorado. 

 Called also false dandelion. April-June. 



20. SITILIAS Raf. New Fl. N. A. 4: 85. 1836. 

 [PYURHOPAPPUS DC. Prodr. 7: 144. 1838.] 



Annual or perennial herbs, with alternate or basal leaves, and mostly large, solitary or few 

 heads of yellow flowers, borne on long, usually bracted peduncles. Involucre oblong or cam- 

 panulate, 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, natives of North America and Mexico. Besides the following, 3 others 

 occur in the southwestern United States. Type species : Sitilias caroliniana (Walt.) Raf. 



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

 Scape naked, monocephalous ; plant hirsute, or pubescent. 



1. 5". caroliniana. 



2. S. grandiflora. 



i. Sitilias caroliniana (Walt.) Raf. Leafy-stemmed False Dandelion. Fig. 4084. 



Leontodon carolinianum Walt. Fl. Car. 192. 1788. 

 S. caroliniana Raf. New Fl. N. A. Part 4, 85. 1836. 

 Pyrrhopappus carolinianus DC. Prodr. 7: 144. 1838. 



Annual or biennial, glabrous or nearly so ; stem 

 leafy, usually branched, 2-5 high. Basal leaves 

 oblong or oblong-lanceolate, pinnatifid, lobed, 

 coarsely dentate or some of them entire, acute, 

 acuminate, or obtusish, 3'-8' long, i'-ii' wide, 

 narrowed into margined petioles ; stem leaves ses- 

 sile or partly clasping, the upper usually lanceo- 

 late, entire and acuminate; peduncles usually pu- 

 berulent; heads i or several, i'-iF broad; invo- 

 lucre commonly puberulent or pubescent, about i' 

 high, its outer bracts setaceous or subulate, spread- 

 ing, the inner corniculate at the apex ; achenes 

 2"-3" long, tipped with a filiform beak of about 

 three times their length. 



In dry fields, Delaware to Florida. Kentucky, Mis- 

 souri, Louisiana and Texas. April-July. 



