438 Salmon : The Erysiphaceae of Japan 



5-6 fjt wide below, 1 7-20 ft wide across the apex ; asci 3-4, 



rarely 5, broadly ovate to subglobose, 45-52x35-4° /A vei T 

 shortly stalked, spores crowded, 4-6, or rarely 7, usually 6, 

 21-24x10-12. (See Figs. 1-12.) The authors remark (1) of 

 the plant, " Mit keiner der bisher auf Celtis bekannten Uncinnla- 

 arten zu identifiziren "; and it is quite true that the present fungus 

 is distinct from U. polychaeta, U. parvula and U. confusa. But 

 after careful comparison I am unable to separate " U. Ktisanoi" 

 from U. Clintonii Peck. At first sight U. Clintonii (m perhaps its 



I 



commonest form) appears distinct in the larger perithecia with more 

 numerous longer appendages, large and more numerous asci, and 

 especially in the much enlarged ciavate apex of the appendages, 

 often measuring 30 ji across (see Figs. 18-23). But, as I have 

 previously pointed out (3) the enlarged apex of the appendages 

 cannot be considered as a constant character of U. Clintonii. In 



■ 



two interesting examples of thq species — one from Crawfordsville, 

 Indiana (E. M. Fisher, Oct., 1890. Ex. Herb. U. S. Dept. Agric, 

 no. 1055), the other from Washington, D. C. (P. Magnus, Oct., 

 1897) (see Figs. 13-17), we find the perithecia exhibiting all the 

 characters of the Japanese plant. 



The perithecia of these American specimens are equally small 

 (in one case the diameter was only 70 fi) the appendages are as 

 few, with the apex measuring 20 fi across ; and the number and size 

 of the asci and spores are the same. Until lately U. Clintonii had 

 been supposed to be confined to the United States (where it is not 

 uncommon, on the single host-plant Tilia Americana, in the East- 

 ern States), but, as I have already recorded (3),?two Japanese 

 examples of a fungus on Zclkova acuminata and Aphananthc aspcra 

 sent to me by Professor Miyabe, although differing slightly from 

 the American forms of U. Clintonii, approached so closely to this 

 species as to be unable to be separated. The discovery in Japan 



a 



& 



certain American examples on Tilia Americana is therefore very 

 interesting. I have received the present species (on Celtis Sinen- 

 sis) from Prof. S. Hori (Tokio, Akabane, Oct. 15, 1899; coll. 

 Nishida & Nambu). 



Pliyllactinia suffulta var. moricola P. Henn. Following the 

 description the author remarks : u Diese Varietat ist von der Typ- 



