NOTES ON THE ERISYPHEI OF THE UNITED STATEs. 171 
interest in the Fungi of the United —— for which he deserves the com- 
mendation and encouragement of his co untrymen 
Microsphera sparsa, Howe. “On both sides of the leaf, mostly 
epiphyllous. Differs from both M. E uo and M. penicillata in the 
dd ; ; ] 
. Howe's Fiore of a form which © we included 
with some hesitation under M. He ie from a reluctance on our part 
to increase the number of species, wherever we could avoid it. Our 
examination resulted in fixing the number of appendages at 8-14, equal 
— 
= 
me 
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p 
"- 
There is a slight discrepancy between our results and those of Mr. Howe ; 
both of us, however, found that 6 sporangia and 6 sporidia occur, whereas 
4 is the number assigned to M. Hedvigii. t have the same species on 
Viburnum dentatum from Saratoga (C. H. P 
icrosphera € Lev., var. 4lni (Br yiple ‘Alni, Tul.. This is 
another form which diverges considerably from the normal type. The 
appendages are from 6 to 16, sporangia 5-8, sporidia 8, rarely 6 or 7. 
On leaves of 4inus.— Buffalo, N.Y.; Greenbush, N.Y. (C. H. P. n. 200.) 
The most material avert between this form and M. penicillata as found 
in Europe seems to be the of sporangia, which is 4 in European, 
5-8 in American set se Be deem some error has inadvertently occurred 
in the examinatio or the resent, therefore, we prefer retaining 1t in 
its association with M. penicillata. We TR T ‘the typical form on 
Corylus rostrata, from Buffalo, N.Y. (C. H l 
Microsphera densissima, C. and P. (Erysi e vimena, Schwz.) Hy- 
phasma very dense, between filamentose and himantioid, in detinite suborbi- - 
cular patches 4—2 inches broad, somewhat radiating at the margin, 
persistent ; conceptacles few, scattered ; appendages 6- 10; sporangia 4— 8; 
sporidia 8. Remarkable for the definite orbicular patches of mycelium. 
On pe of Quercus.—Saratoga, N.Y. (C. H. P. n. 197.) 
sphera Dubyi, Lev., on leaves of Lonicer —Salem, Mass. (E. C. 
B); "Buffalo, NY: 40. 1. P. n. 201); New i alrissorel N.Y. (E. C. 
Howe). In this also, which has normally 4 sporangia and 4 sporidia, we 
find a 5 of both. 
Mi era holosericea, Lev. On both surfaces, mycelium arachnoid, 
Laat conceptacles minute, globose, scattered or gregarious; appen- 
ages 12 any times as long as the diameter of the conceptacles, 
vaguely dichotomous, setulose at the tops or slightly incrassated ; sporangia 
-8; sporidia 4 (rarely 5). On leaves of Astragalus Cooperi.—Bulfalo, 
N.Y. (C. H. P. n. 198.) 
Erysiphe lamprocar pa, Lk. In addition to the forms named in our 
former communication, we refer to this v gaps the Erysiphe found in the 
United States on Solidago - other Composite (C. H. P. n. 161) ; on 
Chelone glabra (C. H. P. 204), w which seems to be tam Erysiphe 
Chelones of Schweinitz. On culti vated Phlor—Albany, N.Y. (C. H. P. 
n. 204), which is undoubtedly the Erysiphe Phlogis of ee Rav. 
Exs. n. 69— Pennsylvania (Dr. Curtis. The Erysiphe on leaves of 
Jasticen distributed by Dr. Curtis, under the name of Erysiphe hor ridula, 
Lev., seems to us to be also the same species 
Erysiphe prera Schl.—On leaves of Thalictrum Cornuti, Greig, N.Y 
(C. H 207) ; on leaves and stems of Thalictrum anemanoides, West 
