318 



authors discuss this fung-us at considerable length and record in detail 

 the results of infection experiments. 



Kirkwood (Phytopath. 5:223-224. 1915) records field infection ex- 

 periments conducted in 1912 in which Comandra pallida was infected by 

 aeciospores from Phms ponderosa. The results were inconclusive. In 

 1914 teliospores were inserted in incisions in the bark of young pine 

 trees resulting in a development of mycelium in the tissues, which on 

 histological examination resembled the condition found in trees known 

 to be natually infected. Further field infections similar to those con- 

 ducted in 1912 were carried out in 1914. 



9. Hyalopsora Polypodii (DC.) Magn. Ber. Deuts. Bot. Ges. 19:.582. 



1901. 

 Uredo Polypodii DC. Fl. Fr. 6:81. 1815. 

 On Polypodiaceae : 



Felix fragilis (L.) Und., Stanton, -July 4, 1894, A. Commons 



(2466) ; Mt. Cuba, July 1894, A. Commons (Distributed in 



Ellis & Ev. Fungi Columb. 765). 



The evidence at hand at the present time leads to the conclusion 



that this species and other members of the genus Hyalopsora are heteroe- 



cious. Bartholomew (Bull. Torrey Club 4.3:195. 1916) shows that the 



mycelium of this species is binucleate in all its forms on the above host. 



No clues to the alternate host have been suggested. 



10. Kuehneola Uredinis (Lk.) Arth. Result. Sci. Congr. Bot. Vienne 



342. 1906. 

 Oidium Uredinis Lk. in Willd. Sp. PI. 6': 123. 1824. 

 Chrysomyxa albida Kiihn, Bot. Centr. 16:154. 1883. 

 Uredo Muelleri Schrot. Krypt. Fl. Schles. 3':375. 1887. 

 Coleosporium Ruhi Ellis & Holw. Sacc. Syll. Fung. 7:759. 1888. 

 On Rosaceae: 



Rubus nigrobaccus Bailey, Faulkland, Sept. 15, 1885, A. Com- 

 mons (175), Oct. 1, 1886, A. Commons (175a) (type of 

 Coleosjiorimn Rubi Ell. & Holw. issued in Ellis & Ev. N. Am. 

 Fungi 1878); Newark, Sept. 5, 1905 (1629). 

 Rnbns f randoms Bi/el. Newark, Sept. 1907 (2012). 



