320 



cessful infection, resulting in pycnia and aecia on leaves and cones of 

 Tsuga canadensis (referred to Peridermium Peckii) by sowings with 

 telial material from Rhodora canadensis. 



A comparison of the morphology of all the spore stages of this 

 species with the following, taken together with the close relationship of 

 the hosts involved, strongly suggests that they should be united under 

 one name. 



See also Phytopathology 8:329-330. 1918. 



14. PucciNiASTRUM Myrtilli (Schum.) Arth. Result Sci. Congr. Bot. 

 Vienne 337. 1906. 



Aecidium Myrtilli Schum. Enum. PI. Saell. 2:227. 1803. 

 On Vacciniaceae : II. 



Vaccinium vacillans, Kalm., Newark, Sept. 17, 1907 (2008) ; 

 Selbyville, Oct. 4, 1907 (1989). 



Clinton (Rep. Conn. Agr. Exp. Sta. 1909-1910:719. 1911) was the 

 first to show that the aecial stage of this species occurred on Tsuga 

 canadensis. He successfully infected Gaylussacia baccata by sowing 

 with aeciospores from Tsuga, resulting in the development of the typical 

 uredinia of this species. 



Eraser in 1912 (Mycol. 5:237. 1913) confirms Clinton's work by 

 obtaining the development of aecia on the leaves of Tsiiga canadensis 

 following sowings from teliosporic material on Vaccinium canadense. 

 The same author in 1913 (Mycol. 6:27. 1914) obtained aecia on Tsuga 

 canadensis following sowing of teliosporic material from Galussacia re- 

 sinosa. The aecia developed in these experiments are similar to those 

 of Peridermium Peckii Thiim. but may represent an undescribed form. 



15. PucciNiASTRUM Pyrolae (Pers.) Dietel, in Engler & Prantl Nat. Pfl. 



1,1** :47. 1897. 

 Aecidium Pyrolae Pers. Gmel. Syst. Nat. 2:1473. 1791. 

 On Pyrolaceae: 



Chimaphila maculata (L.) Parsh., Seaford, June 5, 1908. (2075). 



16. PUCCINIASTRUM PUSTULARUM (Pers.) Dietel, in E. & P. Nat. Pfl. 



1,1** :47. 1897. 

 Uredo pustulata Pers. Syn. Fung. 219. 1801. 

 Pucciniastmm Epilobii Otth. Mitth. Nat. Ges. Bern 1861:72. 1861. 



