170 
Journal oj Mycology 
[Vol. 9 
perithecia were full of ripe or nearly ripe spores—the usual severe 
frosts of September and October disturbing the life neither of 
host nor parasite. The perithecia were very numerous on the 
spots, often more abundant than the usual infection. Very many 
of them appeared at both the upper and lower surface of the 
leaves—which is not common for this species. The original de¬ 
scription, as published by Ellis and Ivellerman, was based on ma- 
Fig. 3. Phyllosticta asiminae Ell. & Kellerm. 
terial collected in July (1883), in Fairfield County, Ohio; in this 
the perithecia were epiphyllous, and the spores were found to be 
7 - 9 X 5-6 u. The recently collected October material showed 
spores with the characteristic color but mostly 10 in length 
and 6 or 7 in width. No figures were furnished originally and 
hence a sketch is presented here. The leaf section shows a 
perithecium situated near each epidermal surface; highly magni¬ 
fied outline figures of the spores appear at the right. 
Rust on Muhlenbergia Diffusa. — It was stated on page 
109 of this Journal that cultures had demonstrated the connec¬ 
tion of Puccinia muhlenbergiae Arthur on Muhlenbergia mexi- 
cana and Aecidium hibisciatum Schw. on Hibiscus moscheutos 
(to which may be added Hibiscus militaris). But strange as it 
may seem, the Puccinia muhlenbergiae Arthur on Muhlenbergia 
diffusa, also used in the cultures (which will be reported in detail 
later) yielded only negative results. For the present therefore 
the name Puccinia hibisciata (Schw.) Kellerm. (Jpur. Mycol. 
9:110, May, 1903) can be used only for the Rust on Muhlen¬ 
bergia mexicana, at any rate not that occurring on Muhlenbergia 
diffusa. Additional cultures will be instituted next season; ma¬ 
terial will be furnished to any experimenters who may care to 
cooperate in this interesting case. 
