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. Pl. 4: 1332. 1847.

Nothocalais cuspidata Greene, Bull. Cal. Acad. (II.) 2:55. 1886.

Leaves linear, long-acuminate, thick, pubescent or glabrate, 4'-8' long, 2"-5" 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 1'-2' broad; involucre usually quite glabrous, nearly l' 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. SITl'LIAS Raf. New Fl. N. A. 4: 85. 1836.

[Pyiirhopappus 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 campanulate, its principal bracts in 1 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.

1. S. caroliniana.

Scape naked, monocephalous; plant hirsute, or pubescent.

2. S. grandiflora.

1. 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, 1/2'-1 1/2' wide, narrowed into margined petioles; stem leaves sessile or partly clasping, the upper usually lanceolate, entire and acuminate; peduncles usually pu-berulent; heads 1 or several, 1'-1 1/2' broad; involucre commonly puberulent or pubescent, about 1' high, its outer bracts setaceous or subulate, spreading, 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, Missouri, Louisiana and Texas. April-July.

1 Sitilias Caroliniana Walt Raf Leafy Stemmed Fals 755

2. Sitilias Grandiflora (Nutt.) Greene. Rough False Dandelion

Fig. 4085

Barkhausia grandiflora Nutt. Journ. Phila. Acad. 7: 69. 1834.

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

Sitilias grandiflora Greene, Pittonia 2: 180. 1891.

Hirsute or pubescent; root tuberous-thickened. Leaves all basal, oblong or spatulate in outline, deeply pinnatifid, 3-7' long, 1-1 1/2' wide, narrowed into margined petioles; scape naked or sometimes with a small leaf near its base; head solitary, 1-2' broad; outer bracts of the involucre small, short, subulate, the inner ones obscurely cornicu-late at the tip.

On prairies, Kansas to Texas. April-June.

2 Sitilias Grandiflora Nutt Greene Rough False Dan 756