Arthur: Uredinales of Costa Rica 141 



87. Puccinia Arthuriana Jackson (on Carduaceae) 

 Vernonia canescens H.B.K., Volcan de Irazu, Cartago, Dec. 24, 



1915, II, III, 281; San Jose, Jan. 3, 1916, O. II, III, 360. 

 The species is a long-cycle one, without aecia of the aecidioid 



form, and heretofore has only been known from the West Indies. 

 It was published in the North American Flora (7:218. 1912) 

 under the name Argomyces Vemoniae Arth., and so listed in the 

 two reports on the Uredinales of Porto Rico (Mycol. 7:180. 

 1915; and 9:67. 1917), but in order to be uniform in placing 

 white-spored forms under the genus Puccinia, it has been given 

 another name in recent studies made by Jackson, as that of P. 

 Vemoniae Schw., was already in use for another species. 



88. Puccinia praealta Jacks. & Holw. (on Carduaceae) 

 Vernonia triflosculosa H.B.K., Heredia, Dec. 17, 1915, II, 262; 



San Jose, Jan. 10, 1916, II, III, 407; San Ramon, Jan. 13, 



1916, II, 426. 



A long-cycle species, whose initial stage is not known. It 

 occurs also in Guatemala on the same host. The sori are deep 

 seated and strictly epiphyllous. 



89. Puccinia idonea Jacks. & Holw. (on Carduaceae) 

 Vernonia triflosculosa H.B.K., San Jose, Jan. 8, 1916, II, III, 



398; same, Jan. 18, 1916, III, 445. 

 The sori of this species, which occurs also in Guatemala, are 

 chiefly hypophyllous. Aecia are not yet known. 



90. Puccinia paupercula Arth. (on Carduaceae) 

 Elephant opus spicatus Juss., San Jose, Jan. 3, 1916, 353. 



A short-cycle species occurring also in Mexico and Guatemala. 

 It was collected on the same host at San Francisco de Guadalupe, 

 by A. Tonduz, July, 1908. This collection was made the basis 

 of a new name, P. Elephantopodis-spicati Pat., and a part of the 

 type material was kindly transmitted for study by the author of 

 it, N. Patouillard. It is found to be identical with the older 

 named species. 



