322 



Fraser in 1910 (Mycol. 4:189. 1912) conducted inconclusive culture 

 experiments indicating that this species on Onoclea sensibilis had for its 

 aecial stage a Peridermium on Abies halsumea. In 1912 (Mycol. 5:236. 

 1913), however, the same author demonstrated conclusively that such was 

 the case. Teliosporic material on Onoclea sensibilis L. was used to suc- 

 cessfully infect the leaves of Abies balsamea resulting in pycnia and 

 aecia of Peridermium balsameum. In three trials using aeciospores 

 from Abies balsamea, uredinia developed on Onoclea. In 1913 (Mycol. 

 6:25. 1914) the results of 1912 were repeatedly confirmed. The species 

 of the genus Uredinopsis are separated on rather slight morphological 

 characters. Fraser reports the results of experiments, however, that 

 indicate that this species is at least biologically distinct. 



PUCCINIACEAE. 



19. Gymnoconia ixterstitialis (Schlecht.) Lag. Tromso Mus. Aarsh. 

 16:140. 1894. 

 Caeoma interstitiale Schlecht. Horae Phys. Berol. 96. 1820. 

 Aecidium nitens Schw. Schr. Nat. Ges. Leipzig 1:69. 1822. 

 Puccinia Peckiana Howe; Peck, Ann. Rep. N. Y. State Mus. 23:57. 



1872. 

 Puccinia tripustulata Peck, Ann. Rep. N. Y. State Mus. 24:91. 1872. 

 Gyninoconia Peckiana Trotter, Fl. Ital. Crypt. l'":338. 1910. 

 Kunkelia nitens Arth. Bot. Gaz. 58:504. 1917. 

 On Rosaceae: I. 



Rubus allegheniensis Porter, Newark, May 1889, F. D. Chester. 



Rubus villosus Ait, Newark, May 15, 1907, (1620), June 16, 



1907, M. T. Cook, (1661). 



Tranzschel (Hedwigia 32:257. 1893) was the first to report success 



in culturing this species. He succeeded in obtaining the development of 



Puccinia Peckiana Howe on Rubus saxafilis by sowing spores of Caeoma 



nitens Burrill. 



In America Clinton (Bot. Gaz. 19:116. 1895) confirmed Tranzschel's 

 work by successfully infecting Rubus villosus with production of telia. 

 He used aecial material from the same host. 



Kunkel (Bull. Torrey Club 40:361-366. 1913; Am. Jour. Bot. 1:37- 

 47. 1914) has shown that Caeoma nitens on Rubus frondosus behaves 



