12 THE ERYSIPHEI OF THE UNITED STATES. 
sporidia. Appendages 10—20, a little longer than the diameter of the 
conceptacles, simple, uncinate.—On both si ides of leaves of Elm, Wat thing, 4 
RE S 3 . 159). 
7. U.a c, Lev ; Co oke, Handbook, n. 1913.— On leaves, Carolins 4 
on y^ C. Dis on Willow leaves, Albany, E X. (O..H. P. n. 
a, € P 
160). 1 
.and P. Amphigen satin Erga Me 
diat or dps Conceptacles ex subglobose, scattere 
crowded. Sporangia 8-16, narrowly ovate, 8-spored. Appendages 
numerous, simple, as long as the diameter of the conceptacles, circinate at 
the ape ex.—On leaves of Acer, c£ aui n. 1884); 
A. spicatum, Watkins, N. Y. (C. H. P 158).—The appeniaget e 
longer, more sl ender, and more numerous than in U. bicorn bes 
simple, and more like those of U. adunca. It cannot be Mie 
variety of either of these. 
9. U. polycheta, B. and C. Amphigenous. Mycelium-effused, arach- 
pe toga or subpersistent. Conceptacles scattered, globose. 
——? spores. Appendages very numerous, not 
onde than He diameter of fu conceptacles, simple, uncinate. On 
leaves of — Carolina (M. 
. Microsphera RA udi a, pus Hypophyllous. Mycelium arach- 
noid, “evanescent. Conceptacles scattered, globose, minute. Sporangia 
4, ovate, rostrate, tetrasporous. Appendages jud five times and upwards 
the n of the diameter of the sporangia.— Erysiphe divaricata, Schwz. 
. 2413. 
Fung. Am. Bor. n. 2473.—On Alnus RE. "Carolina (Schwz.).— 
This un rests on 1 the authority of eerste and requires confirmation. 
7 and P. Epiphylious. Mycelium arachnoid, sub- 
persistent. Conceptacles minute, globose, scattered. Sporangia 4, ovate, 
with 4-8 sporidia. Appendages 8-12, four times as long as the > diameter 
o l B = 
—0On upper surface of leaves of Quercus rubra, Greenbush, N. Y. (C. H. P. 
n. 5 1). 
. M. Hedwig, Lev.; Cooke, Ha Ene n. 1918.— Erysiphe 
lere Sehwz. Fung. Am. Bor. n. 2483 ?—On leaves of Quercus ax DN 
Carolina (M. A. C.); on leaves of Viburnum Lele: New York (C. H 
18. M. une Lev.; Cooke, Handbook, n. 1919.—On leaves, 
Carolina (M. A 
14. M. AE ‘C. and P. Amphigenous. Mycelium effused, arach- 
noid, evanescent, or subpersistent. Conceptacles globose, crowded, or 
scattered. Sporangia 4-6, with 4-6 sporidia. Appendages 10-20, near 
twice as long as the diameter í the conceptacles, four times dichoto- 
mously branched above; apices swollen.—On both sides of leaves of 
Cornus alternifolia, Greenbush, N. Y. (C. H. P. n. 155).—Allied to 
Friesii, but rather larger and more beautiful; the ue -are 
more P ries and the gms more e alene and elaborate 
15 
raugia 4—6, orate, with 6 sierra Appendages few (4—8), si ‘exceed- 
ing the diameter of the conceptacles.—Var. C, Syrincm, Erysiphe 
Syring ge, Schwz. Fung. Am. Bor. n. 2488 ? on Syringa vulgaris, Cerat 
(M. A. C), ber N. Y. (CO. H. P. n 15D: var. D, VAOOIRU, 
on leaves of ` 
