278 



CICHORIACEAE. 



[Vol. III. 



2. Agoseris parviflora (Nutt.) Greene. 

 Small-flowered Agoseris. (Fig. 3549.) 



Troximon parviflorum Nutt. Trans. Am. Phil. Soc. 



7:434- 1841. 

 Troximon glaucum var. parviflortim A. Gray, Syn. 



Fl. 1: Part 2, 437. 1884. 

 Agoseris parviflora Greene, Pittonia, 2: 176. 1891. 



Perennial, glabrous throughout; scape slender, 

 much longer than the leaves, 5 / -i5 / high. 

 Leaves narrowly linear, acuminate, entire, 3 / -8 / 

 long, \"-2y 2 " wide; head i / broad or less; invo- 

 lucre oblong-ovoid, becoming nearly hemispheric 

 in fruit, 6 // -S // high, glabrous, its bracts lanceo- 

 late, acuminate; achenes conspicuously beaked, 

 about 4" long; pappus of numerous unequal very 

 slender bristles. 



Plains, western Nebraska to Manitoba, Idaho and 

 New Mexico. Called also False Dandelion. May- 

 July. 



18. NOTHOCALAIS Greene, Bull. Cal. Acad. (II) 2: 54. 1886. 

 Perennial herbs, with basal tufted narrow undulate or crisped, tomentose-margined leaves, 

 and large heads of yellow flowers solitary at the ends of simple naked scapes. Involucre 

 oblong-campanulate, its bracts in 2-4 series, lanceolate, acute, or acuminate, appressed, nearly 

 equal, the margins hyaline. Receptacle flat, alveolate. Rays truncate and 5-toothed at the 

 apex. Anthers sagittate at the base. Achenes fusiform, contracted or beaked at the sum- 

 mit, 10-ribbed or 10-striate. Pappus of 10-30 white soft unequal narrow scabrous scales, 

 with or without some capillary bristles. [Greek, false Calais.] 



Three known species, natives of western and central North America. 



i. Nothocalais cuspidata (Pursh) 

 Greene. False Calais. (Fig. 3550.) 



Troximon cuspidalum Pursh, Fl. Am. Sept. 742. 



1814. 

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

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



2:55. 1886. 



Leaves linear, long-acuminate, thick, pubes- 

 cent or glabrate, 4 / -8 / long, 2 // -5 // wide, some- 

 what conduplicate, their margins conspicuously 

 white-tomentose and crisped, or entire. Scape 

 stout, tomentose, at least above, shorter than or 

 equalling the leaves; head i / -2 / broad; involu- 

 cre usually quite glabrous, nearly 1/ high; 

 achenes slightly contracted at the summit; 

 about 3" long; pappus of 40-50 unequal scales 

 and bristles. 



In dry soil, on prairies and rocky hills, Illinois 

 to the Northwest Territory, south to Nebraska and 

 Kansas. Called also False Dandelion. April-June. 



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

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

 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 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-, 2 others 

 occur in the southwestern United States. 



