2 SALMON: SUPPLEMENTARY 
and Erysiphe pisi var. desmodii. To this number of supposed new 
Japanese species, Sydow (82) has added another, viz. Uncinula_ 
Kusanot. With one exception—Uncinula verniciferae P,. Henn., 
which appears to be distinct—I consider that these Japanese plants 
are all to be referred to already described North American species, — 
orto cosmopolitan ones. Notes on some of these Japanese plants © 
will be found in my “ Erysiphaceae of Japan” (68); the remain- | 
ing species are discussed in the following pages. | 
The Erysiphaceae of South America have been noticed by — 
Spegazzini (79) and also by Neger (52). The former author has © 
described as a new species “ Erysiphe deserticola” from the Argen- — 
tine Republic, and has recorded other species of Erysiphe from the 1 
same country. The only specimens I have been able to see of — 
“E. deserticola” have been in an immature condition, and I am. P| 
inclined to think from these that the plant will prove to belong to | 
the cosmopolitan species FE. polygoni DC. The other South © 
American species of Exysiphe recorded by Spegazzini prove to be — 
E. cichoracearum DC. and £, galeopsidis DC.. Of special interest 
is Spegazzini’s ('79, p. 330) record of the occurrence in the Ar- 
gentine Republic and. Uruguay of the conidial (Ozdivm) stage of 
members of the Erysiphaceae on no less than 98 different species 
of host plants—a fact which shows that these fungi flourish at all 
events in some parts of South America. 
‘Neger (§2) has described as new species, from the Argentine 
Republic, Phyllactinia clavariacformis, Microsphaera myoschili and 
Erysiphe Fricki. Phyllactinia clavariaeformis proves to be identical 
with P, antarctica Speg., and although presenting somewhat re- 
markable characters which perhaps entitle it to be regarded as an 
incipient species—cannot be regarded as distinct from the old P. 
corylea (Pers.) Karst. The question of the relation of “ P. clavari- 
acformis’’ to the type, is discussed in detail below, where mention 
is made of the fact that forms of P. corylea quite similar to the 
South American “ P. clavariaeformis”’ appear sporadically on va- 
rious hosts in Europe and Asia, along with all intermediate forms. 
M. myoschili is certainly only one of the forms of JZ almi which 
show a much-branched apex of the appendages. £. /ricki is in- 
distinguishable from £. polygont, 
In Europe Serbinov (76) has described from Russia a var. 
