138 



Mycologia 



A short-cycle species, described from South America, and 

 now reported for the first time from North America. The host 

 is the yerba mora, common in the gardens of Costa Rica, and 

 grown for its edible fruit. The plant much resembles large 

 forms of Solanum nigrum. 



77. Puccinia Pittieriana P. Henn. (on Solanaceae) 



Solanum tuberosum L., Volcan de Irazu, 10,000 feet alt., Cartago, 

 Jan. 21, 1916, 455. 

 This short-cycle species, the only rust known on the common 

 field potato, was first collected by H. Pittier, on Volcan de Irazu, 

 September, 1903, and again at La Canada, probably at or near the 

 original locality, in October 1904. It has not yet been reported out- 

 side the type vicinity. 



78. Puccinia Acnisti Arth. (on Solanaceae) 

 Acnistus arbor escens Schl., San Jose, Dec. 10, 191 5, I, 240; 

 Heredia, Dec. 17, 1915, O, I, 266 ; road to Fraijanes, Volcan 

 de Poas, Jan. 6, 1916, I, 3/6; Cartago, Jan. 20, 1916, I, 449. 

 A long-cycle species, having pycnia, aecia and telia, now first re- 

 ported for North America. The type material came from the 

 mountains of Peru, and on the same host. 



79. Puccinia nesodes Arthur & Holway sp. nov. (on 

 S cro phulariaceae) 



Lamourouxia Gutierrezii Oerst., road to Fraijanes, Volcan de 



Poas, Jan. 6, 1916, 379 ; San Jose, Jan. 11, 1916, 411. 

 Lamourouxia viscosa H.B.K., Tres Rios near San Jose, Dec. 20, 

 1915, 2 75 (type). 

 Telia chiefly hypophyllous, more or less confluent in circular 

 groups 1-6 mm. across, round, 0.1-0.5 mm. in diameter, early 

 naked, pulvinate, chestnut-brown, becoming cinereous by germina- 

 tion, ruptured epidermis inconspicuous ; teliospores obovoid or 

 ellipsoid, 13-19 by 26-39 /x, rounded above, rounded or narrowed 

 below, slightly constricted at septum; wall cinnamon-brown, thin, 

 1-2 thicker above, 3-7 /x, smooth ; pedicel colorless, once or 

 twice length of spore. 



This short-cycle species has resemblances to others on the 



