THE ERYSIPHEI OF THE UNITED STATES. 13 
Erysiphe doe Schwz. Fung. Am. Bor, 2491 (partly) ; on both 
n. 153): s of Vaccinium corymbosum; aah, NWY CB. FJ 
ide 23 var. E ASTANEJE, on leaves of Castanea vesca, Sandlake, N. Y. 
(C. x P.n 
VM. Vacciná, C.and P. Amphigenous. Mycelium arachnoid, eva- 
Baud. Conceptacles globose, scattered. Sporangia 6—8, with 6—8 spori- 
dia. Appendages rather numerous (12-20), 4-6 times as long as the dia- 
meter of the conceptacles, 3—4 times dichotomously branched above ; tips 
swollen.—Zrysiphe Vaccinii, Schwz. Fung. Amer. Bor. n. 2491 (partly). 
On leaves of Vaccinium vacillans.—W est Albany, N. Y. (C. H. P. 153 
17. M. diffusa, C. and P. ~ Amphigenous. Mycelium er ; 
evanescent. Conceptacles minute, globose, sca ttered. Sporangia 4-6, 
ovate, with 4-6 sporidia. Appendages rather numerous (18-25), twice 
the length of the dans eter of the conceptacles, about four times dicho- 
tomously branched above ; ramuli lax, tips obtuse, ma swollen.—On both 
surfaces of leaves of Desmodium canadense, — Y. (C. H. P. n. 152). 
—Allied to M. Dubyi, but manifestly distinet 
8. M. semitosta, B. and C. Conceptacles globose. Sporangia pyri- 
€ iei rous,  Appendages few (about 6), not exceeding the 
diameter of the conceptacles, 3—4 times dichotomously t branched above. 
Curtis s. Catalogue, s of erii | dd Berk. Introd. p. 278. f. 
n lea aves of Cephalanthus, Caran “OM. A. C.) This name is 
logue, p. 152.—On feared of Gieditschia,. Calin (M. A. C.).—Our 
specimen in Ravenal’s Fungi Car. consists only of mycelium without a 
single —— and no deseription has been published. 
. Dubyi, Lev. Amphigenous. Mycelium effused, interwoven, 
evanescent or sabporsistent. eerie et “scattered or gregarious, glo- 
bose, minute. Sporangia 4, ovate, tetrasporous. Appendages few a 
10), scarcely longer than the uetus of the conceptacles ; ramuli b 
rnute.—On Ho sneysuckle. — Portland, Maine (E. C. B. 
21. Erysiphe lamprocarpa, Link; Cooke, Handbook, n. 1925.— 
Erysiphe Asterum, Schwz. Fung. Am. Bor. n. 2489? 2493.—On Mints, 
pee, (Schwz.); on leaves of Aster and Solidago, Albany, N. Y. 
(C. H. P. 161). 
22. E. graminis, es Cand.; Cooke, Handbook, n. 1926; Schwi. 
Fung. Am. Bor. n. 2474.—On Gra rasses, Carolina (Schwz.). 
23. E. Martii, Link; Cooke, Handbook, n. 1927. —On Eupatorium 
ageratoides, Carolina (M. A. C.) ; on stems and leaves of Peas, Albany, 
N.E.(C.H E x Hl 
2 E. PE Link ; Cooke, Handbook, n. 1929; Schwz. Fung. 
«eee 2472 —On leaves of Cornus, Carolina (Sehwz.).— This 
ee cies eng on the authority of Schweinitz, and requires confirmation. 
Microsphera pulchra is so very similar to the naked eye, that this species 
may have been confounded with it. 
95. E. horridula, Lev. ; Cooke, Handbook, n. M —On Xanthium, 
— (Schwz.).—This also requires confirmat 
PA m Schl. ; Cooke, Haste n. "1980. —On Ranuncu- 
Ma Maine (E. C. B.). 
