IOWA ACADEMY OF SCIENCE 
57 
The black rot of the grape. Abundant on leaves and fruits of the wild grape 
and on the leaves of the Virginia creeper, being a most destructive pest to 
both. 
62. Mycosphaerella Feagabiae (Tul.) Lindau. ISphaeriella Fragariae 
(Tul.) Sacc., Rmnularia Fragariae Peck.]. 
On Fragaria virginica Duchesne, and F. americana Britton. 
The strawberry rust. Very aboundant on the first host named but rare on 
the last one. Only the conidia were seen. 
ORDER PHACIDIALES. 
Family Phacidianceae. 
63. Rhytisma acerinum (Pers.) Fries. 
On Acer saccTiarinum L. 
The “tar spot” disease of maples was rather abundant throughout the 
county during the past season. 
64. Rhytisma salicinum (Pers.) Fries. 
On Salix lucida Muhl. 
Found once in fair abundance. 
65. Rhytisma Solidaginis Schwein. 
On Aster cordifolius L., Solidago graminifolia (L.) Salisb. (Euthamnia 
Millsp.) and S. latifolia L. (S. flexicaulis L.). 
The exact nature of this species is in doubt, for while it is known that an 
insect gall always forms a part of the spot there are always fungous hyphae 
present, but so far no spores have been observed. 
order pezizales. 
Family Helotiaceae. 
66. ScLEROTiNiA FRUCTIGENA (Pers.) SchroBter. [Monilia fructigena pers.] 
On fruits of Prunus americana Marsh. 
The common brown rot of stone fruits, which is very destructive to certain 
races of both wild and cultivated plums and cherries. 
67. SCLEROTINIA TUBEROSA (Hedw.) Fuckel. 
On Anemone quinquefoUa L. 
A single small clump of this species has been collected. The subteranian 
sclerotia are attached to the rhizomes of the wood anemone. In some localities 
the fungus is abundant enough to be quite destructive. 
Family Mollisiaceae. 
68. Mollisia Dehnii (Rabenh.) Karst. 
On Potentilla monsepalensis L.. 
Abundant on stems, leaves, and leaf veins of the host in early summer. 
