268 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



Parthenium L. 



P. Hysterophorum L., Sp. pi., vol. 2, p. 988 (1753); Griseb., Fl. 

 Brit. W. Ind., p. 369.— Santa Ana, Erjist; El Valle, Miller & Johiston, 

 no. 233. Venezuela: near Caracas and on the banks of the Orinoco, 

 HBK., Nov. gen. et sp., vol. 4, p. 259. Widely distributed in temperate 

 and tropical America. 



Pluchea Cass. 



P. ODORATA (L.) Cass., Diet. sci. nat., vol. 42, p. 3 (1826); Griseb., 

 Fl. Brit. W. Ind., p. 366. Conyza odorata L., Syst. nat., ed. 10, vol. 2, 

 p. 1213 (1760).— Santa Ana, Ernst; El Valle, Miller & Johnston, 

 no. 1, July 21, and Johnston, no. 318. Distribution general in tropical 

 America. 



PoROPHYLLUM Adans. 



P. RUDERALE (Jacq.) Cass., Diet. sci. nat., vol. 43, p. 56 (1826); 

 Griseb., Fl. Brit. W. Ind., p. 379. Klelnia ruderalis Jacq., Enum. 

 pi. Carib., p. 28 (1760), as rudealis. — Santa Ana, Ernst; El Valle, 

 Miller & Johnston, no. 130, July 24. Distribution general in tropical 

 America. 



Senecio L. 



S. soNCHiFOLiA (L.) Moench, Meth. suppl., p. 231 (1802). Cacalia 

 sonchifolia L., Sp. pi., vol. 2, p. 835 (1753). Emilia sonchifolia DC, 

 Prod., vol. 6, p. 302 (1837).— El Valle, Miller & Johnston, no. 137, 

 July 19. Widely distributed in tropical countries. 



SONCHUS L. 



S. OLERACEUS L., Sp. pi., vol. 2, p. 794 (1753); Griseb., Fl. Brit. W. 

 Ind., p. 384. — Santa Ana, Ernst. Widely distributed in temperate 

 and tropical countries. 



Spilanthes Jacq. 



S. OCYMIFOLIA (Lam.) A. H. Moore, Proc. Amer. acad. arts and sci., 

 vol. 33, p. 531 (1907). Bidens ocymifolia Lam., Encycl., vol. 1, p. 416 

 (1783). Spilanthus exasperata Jacq., Ic. pi. rar., vol. 3, p. 15, pi. 584 

 (1786-93).— Rio Asuncion, alt. 450 m., Johnston, no. 102, Aug. 12-15. 

 Venezuela: Caracas, Birschel; Colonia Tovar, Fendler, no. 691, 

 1854-55. Distribution general in tropical America. 



