104. TWENTY-SEVENTH REPORT ON THE STATE MUSEUM. 
It seems to prevent the development of the annoying 
spikes of spiny involucres of the grass. If this be really 
the case the fungus ought to be ‘classed among the useful 
species. 
UrReEpo Sminacts Scho. 
Leaves of Liliwm Canadense. Buffalo. August. Clinton. 
Urepo Empetri D. C. 
Leaves of the crowberry, Hmpetrum nigrum. Summit of 
Haystack Mountain. August. 
AcipiIuM NES 2 Gerard. 
Stems and leaves of Wesea verticillata. Poughkeepsie. 
Gerard. Buffalo. Clinton. 
JACIDIUM DUBIUM Clinton. n. sp. 
Spots scattered, suborbicular, yellow or purplish ; nigel 
small, subcircinating, crowded ; spores yellow. 
Lower surface of leaves of Calystegia. Squaw Island. 
June. Clinton. 
Very near 47. Compositarwm, and in the dried state 
scarcely to be distinguished from that species except by the 
habitat. 
PERIDERMIUM ELATINUM Lk. (4cidium elatinum A. & 8.) 
Living leaves of balsam trees, Abies balsamea. Indian 
Lake. J uly. The leaves attacked by this fungus scarcely 
exceed half the usual size. 
PERIDERMIUM BALSAMEUM %. Sp. 
Spots indefinite, whitish or pale yellow ; peridia subro- 
tund, slightly elevated, generally arranged in two rows, at 
first entire, then lacerated at the apex ; spores subglobose, 
rough, white, about .001’ in diameter. 
Lower surface of balsam leaves. Adirondack Mountains. 
August. (Plate 2, figs. 24-26.) 
The affected leaves attain the usual size, but, by their pale 
color, contrast beautifully with the healthy ones, and give 
the foliage a variegated appearance. ‘The fungus was 
observed on young trees only. 
PERIDERMIUM DECOLORANS 72. Sp. 
Spots indefinite, yellow, generally discoloring the whole 
leaf; peridia subrotund or oblong, pustulate, at length rup- 
