268 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
PARTHENIUM L. 
P. HystrropuortM L., Sp. pl., vol. 2, p. 988 (1753); Griseb., FI. 
Brit. W. Ind., p. 369.— Santa Ana, Ernst; El Valle, Miller & Johnston, 
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. 
PiLucueEa Cass. 
P. oporata (L.) Cass., Dict. 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. . 
PoropHyiium Adans. 
P. RUDERALE (Jacq.) Cass., Dict. sci. nat., vol. 43, p- 56 (1826); 
Griseb., Fl. Brit. W. Ind., p. 379. Kleinia ruderalis Jacq., Enum. 
pl. 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). Cacalta 
sonchifolia L., Sp. pl., vol. 2, p. 835 (1753). Emilia sonchifola DC., 
Prod., vol. 6, p. 302 (1837).— El Valle, Miller & Johnston, no. 137, 
July 19. Widely distributed in tropical countries. 
Soncuus L. 
S. oLeRAcEvs L., Sp. pl., vol. 2, p. 794 (1753); Griseb., Fl. Brit. ee : 
Ind., p. 384.— Santa Ana, Ernst. Widely distributed in tempe™ 
and tropical countries. 
SPILANTHES Jacq. 
S. ocymironia (Lam.) A. H. Moore, Proc. Amer. acad. arts and gee 
vol. 33, p. 531 (1907). Bidens ocymifolia Lam., Encycl., vol. 1, p- 419 
(1783). Spilanthus exasperata Jacq., Ie. pl. rar., vol. 3, p- 155 ph. = 
(1786-93).— Rio Asuncion, alt. 450 m., Johnston, no. 102, Aug: ee 
Venezuela: Caracas, Birschel; Colonia Tovar, Fendler, n0- 691, 
1854-55. Distribution general in tropical America. 
