Uncinula 119 



Hosts. — Lag 



■lifolia 



Distribution. — Asia: Japan (Sendai, K. Miyabe, Aug., 1893, 



and Tokyo, S. Hori., 1S96). 



Australia : New South Wales Botanic Gardens, Sydney. 



At the beginning of 1 899 Professor Miyabe sent me among 

 some Japanese Erysiphaceae an Uncinula on Lagerstroemia Indica, 

 with the following note ; " U. lagcrstroemiac n. sp. Appendages 

 very characteristic, their tips are circinate very tightly in a helicoid 

 manner; 78-120 X 4-5/^- Their number is few (3- 



Subsequently I received from Professor McAlpinc an Uncinula 

 on Lagerstroemia oi'alifolia (" sparingly on leaves, but covering 

 entire inflorescence ") from the Botanic Gardens, Sydney, under 

 the name of U. Australiana McAlp.; with a note that this name 



would shortly be published. 



A comparison of the Japanese and Australian plants showed 



them to be identical. 



U. Australiana is somewhat intermediate between U. necator 

 and U. Sengokui. The latter species differs in the colorless, more 

 numerous, crowded appendages, distinctly stouter throughout, and 

 8_9 M wide in the upper half (where those of U. Australiana are 

 only' about 6 fi wide) ; U. necator (to the few, short-appendaged 

 forms of which the present species closely approaches) differs in 

 the always more colored appendages. In U. Australiana the color 

 is strictly limited to the base, not occurring above the septum ; in 

 all forms of U. necator the color extends upwards for a consider- 

 able distance. In the present species, also, it is not at all uncom- 

 mon to find some of the appendages of a perithecium quite color- 

 less. * 



17. U. fraxini Miyabe mss. sp. nov. [Figs. 69-72] 



Amphigenous; mycelium evanescent; pcrithecia scattered, 

 small, 75-105 IX in diameter, usually 80-90 «, globose-depressed, 

 cells distinct, irregular in shape, averaging 10 /^ wide ; append- 

 ages io--'8 \% to 2>^ times the diameter of the penthecmm, 

 straight or' slightly curved, simple, aseptate, thin-walled and 

 hyaline throughout, apex simply uncinate or sometimes distinctly 

 hehcoid ; asci 4-7, usually 5 or 6, oblong to subglobose, occasion- 

 ally shortly stalked, 45-58 x 3^-40 /^ ; spores 8, 16-18 x 

 9-10 «. 



* Since the above remarks were written, Mc Alpine (225*} has published an ac 

 count of his species. It is here stated that the appendages are sometimes forked. 



