Supplementary Notes on the Erysiphaceae 
By E. S. Satmon, F.L.S. 
ADDENDA 
I have lately received from Professor Shotaro Hori a very in- 
interesting Uncinula from Japan (Tokio; coll. K. Yoshino, 6 Nov. 
1901). The fungus presented these characters : 
__ Perithecia truly amphigenous, mycelium subpersistent, very 
thin, effused ; perithecia 85-120 in diam., cells of outer peri- 
thecial wall 10-14 4 wide; appendages 9-21, from slightly ex- 
ceeding the diameter of the perithecium to 1.5 times its diameter, 
Straight or slightly curved throughout their length, simple, color- 
less, aseptate, stout, about 7 # wide in the lower half, not or only 
slightly enlarged upwards ; apex closely coiled, not swollen, some- 
@ times slightly helicoid, basal part of appendage becoming refractive 
_ 4nd thick-walled ; asci 4-6, broadly ovate, 45-50 x 28-30 /, stalk 
_ Very short ; spores usually 4-6, rarely 3 or 7, very rarely 8, ellip- 
_ old, rounded at the ends, 18-19 x IOP. 
|. From typical U. Sengokui Salm., the above fungus differs only 
p, the usually fewer appendages and in the fewer slightly smaller 
foc. The appendages also of the present form are, perhaps, more 
frequently Straight, but otherwise, in shape, size, stoutness, etc., 
“Sree perfectly with those of typical U. Sengokut, When, as is 
often the case, the appendages are few and distant, the present 
form Somewhat approaches U. De/avayi Pat., but that species 
ffers in the larger cells of the outer wall of the perithecium, in the 
Still fewer appendages which are distinctly swollen upwards, and 
m the larger asci and spores. When, however, the appendages 
ae more numerous, the present form is seen clearly to be mor- 
Phologically inseparable from U. Sengokui, of which it must, at any 
‘ate for the present, be considered a small form. U. Sengokui is 
oly known on Celastrus articulatus (from Komaba, Tokyo), while 
form described above was collected on Fraxinus Bunge ane 
. Var. pubinervis Wenz. This occurrence is especially interest- 
eScause hitherto the only Uncinula known to occur on Frax- 
Was U. fraxini Miyabe (on Fraxinus longicuspis), a species 
‘RAT 
