2IO 



MYCOLOGY 



scattered, or aggregated and its aecia on seven species of Amelanchier, 

 one each of Aronia and Cydonia. 



Gymnosporangium Ellisii (Figs. 74 and 75) in its telial form distorts 

 the younger branches of the white cedar, Chamacyparis thyoides, pro- 



FiG. 80.— RoesteUa, or fficia on apple leaf. (After Giddings and Berg, Bull 257 

 Agric. Exper. Stat. Univ. Wise, July, 1915.) 



ducing numerous fasciations. The «cia and pycnia of this fungus 

 are on Myrica. Gymnosporangium globosum is remarkable in forming 

 aecia on eighty-five different species of hawthorn, Crataegus, while its 



