Uncixula 89 



less scattered, globose-depressed, 70-120 /i in diam., aver. 95 jjt, 

 cells about 10 ft wide ; appendages 1 1-48 in number, usually from 

 20-30, l^_ , _ ^ 



only equalling the diameter, simple, smooth or often rough towards 

 the base, aseptate, thin-walled and hyaline above, often becoming 

 refractiv^e at the base, 4-6 {i wide, usually slightly enlarged up- 

 wards and about 6 // wide, more or less abruptly flexuose or 

 angularly bent in the upper half, sometimes irregularly swollen or 

 sub-nodulose, apex simply uncinate, or frequently sub-helicoid ; 

 asci 4-7, broadly ovate to subglobose, with or without a short 

 stalk, 40-56 X 30-3 



12 l^. 



Hosts 



M 



Distribution. — Asia : Japan (Sapporo, K. Mi)-abe, October, 

 1890, September, 1894, September and October, 1895, on Alnus 

 Japonica ; G. Yamada, September, 1896, on A. incauci). 



The present plant shows some affinity with U. gcniadata and 

 U.flexuosa in the usually flexuose or angularly bent appendages, 

 but in all other characters it is so closely allied to U. salicis that 

 it seems best to place it a variety under this species. In the notes 

 which Professor Miyabe sent with the specimens of Japanese Ery- 

 sipJiaccae, the present plant is thus referred to : " Related to U. 

 salicis, but perithecia smaller (loo/i). Appendages fewer in num- 

 ber (22-30), slightly flexuose and nodose, longer (180-200//)." 

 In certain forms of U. salicis on poplar, however, we meet with 

 perithecia only 90 ,« in diameter, with only from 15-30 appendages, 

 which frequently reach to 2]^ times the diameter of the perithe- 

 cium. As a rule, however, U, salicis can be at once distinguished 

 from the present variety by the larger size of the perithecia, which 

 average 135 /i in diameter (those of the variety averaging 95//), 



and the more numerous appendages. 



It is, however, by certain characters of the appendages that 

 the var. Miyabci is best distinguished. If several perithecia are 

 placed under the microscope, it will be seen that the appendages 

 of by far the greater number are abruptly flexuose or angularly 

 bent in the upper half, as shown in figs, ^i, 74- 75- and m this 

 respect are somewhat similar to those of U. gcniculata. Further, 

 the appendages of the var. Miyabei become, when mature, refrac- 

 tive and thick-walled at the base, whilst in the type, as far as I 

 have seen, they invariably remain thin-walled throughout. 



