176 



PITTOXIA. 



2. P. CoopEKi. Riddellia CoopeH, Gray, Proc. Am. 

 Acad. vii. 358 (1868). 



3. P. TAGETiNA. Riddellia {agetina, Nutt. Trans. Am. 

 Phil. Soc. 1. c. (1841). 



Var. SPAKSIFLOEA. R. iageiina, var. sparsiflora, Gray, 

 Syn. Fl. 318. 



AGOSERIS. 



Kafinesque, Fl. LiidoY. 58 (1817) ; Journ. de Pliys. 100 

 (1819). Macrorhynchus, Less. Syu. Comp. 139 (1832). 

 Ammogeton, ScLrad. Cat. Sem. Goetting. 1 (1833). Ciwto- 

 phura <& Stjjlopappus, Nutt. Trans. Am. Pliil. Soc. n. ser. 

 yii. 431 (1841). Species of Troximon, Nutt. in Fras. Cat. 

 (1813), & Gen. (1818), not Ga^rtn. 



♦ Perennials of ivestern North A 



merica. 



rl' ^ <^LAUCA. Troximon glaucum, Pursh Fl. ii. 495 & 

 •• lof!"^^' ^''**' '"^ ■^'''^^- ^^*- (1^13' name'only), & Gen. 

 ^^ u T)^^'^^^' ■^^^^' ^^^® ^^^^ acaulesccnt Troximon taken 

 up by Pursh, must be what Eafinesque chose as the type of 

 Agoseris. Pursh's second acaulescent species, published in 

 the Supplement, i. e. T. cuspidahun, is not congeneric with it. 

 It belongs to my Nothocalais, Bull. Calif. Acad. ii. 54 (1886). 



2. A. PAEYIFLORA. 



ifl, 



Am. Phil. Soc. vii. 434 (1841) ; Greene, Pitt. ii. 78. 



3. A. EOSEA. Troximon roseum, Nutt. 1. c. (1841). This 



obscure plant of the "Plains of the Platte" has not been 



rediscovered ; but its existence has not been disproven, nor 



Its Identity uith any other species ever been established, 



or more than vaguely guessed. 



78^(1890)'^^^^'^^^*^*'^' '^'^''^''''^'' Arizonicum, Greene, Pitt, ii- 



