416 Wisconsin Academy of Sciences, Arts, and Letters. 
surgent, hyaline, straight or somewhat curved, 30-50 x iy 2 -2y 2 u ; 
conidia apical, hyaline, subacute, straight, continuous, 18-45 x 
1 ^2-2 y 2 fx. On Polygonum cilinode, Hannibal, July 24, 1920, 
(type), Cadott July, 28, 1920, “conidia 15-35 x2-3/*”; Holcombe, 
August 7 and 8, 1920; Radisson, July 7, 1906. Also Mountain, 
Ellison Bay, Solon Springs, Black River Falls, and Necedah. June 
and July. The fungus has been found on Polygonum cilinode only 
and confined to the Septoria spots on which it shows as a delicate 
white mold. 
Ramularia umbrina Davis (Trans. Wis. Acad. 192:714) should, 
I think, be considered a synonym of R. diervillae Pk. 
The fasciculi of Cercospora rhamni Fkl. are described as oli¬ 
vaceous, but in Wisconsin on both Rhamnus cathartica and R. 
alnifolia they are often a decided rusty brown because of the 
color of the conidiophores which are 40-65 /i long. 
Cercospora clavata (Ger.) Pk. is a common and variable para¬ 
site of Asclepias in Wisconsin. What I take to be a form of this 
on Asclepias syriaca causing pale orbicular spots is of the char¬ 
acter of Cercospora asclepiadis Ellis (Am&r. Nat. 16:810, 1890), 
C. asclepiadis Henn. (Hedwigia 41: 309, 1902), and C. venturioides 
Pk. Conidiophores sometimes exceed 100^. 
Ramularia ionophila Davis was given specific rank largely be¬ 
cause it appeared to be confined to the single species of violet, 
Viola canadensis, in Wisconsin. However, a collection on Viola 
ocellata made at Paradise, California, by F. R. Jones seems re¬ 
ferable to this species. Ramularia biflorae Magn. is the European 
analogue to which perhaps the American form should be referred. 
I have not seen an authentic specimen of Ramularia rubicunda 
Bres., but judging from the description Cercospora subsanguinea 
Ell. & Evht. can scarcely be distinct. 
Arthur and Bisby (Proc. Amer. Philos. Soc. 57:201) found 
that Schweinitz’s Caeoma (TJredo) teucrii as represented in the 
Schweinitz herbarium is Ramularia racemosa Ell. & Mart., and pro¬ 
pose the binominal Cercospora teucrii (Schw.) Arthur & Bisby. 
As I understand it, the object of rules in nomenclature is to secure 
uniformity of usage. As all determined specimens of Cercospora 
racemosa were so labeled in all herbaria such uniformity has been 
secured and I see no occasion for changing all the labels. This 
