BULLETIN OF THE BUSSEY INSTITUTION. 249 
HELVELLACES. — We have several times found on Adies balsamea 
a fungus which has given us a great deal of trouble to determine. It 
was evidently the stylosporous condition of a Cenangium. The fungus 
is of a silvery-gray color, the disk is depressed and surrounded by a 
thin margin, and the surface is generally dotted with minute white 
spots. A section shows a number of cavities lined with stylospores, 
which are bluntly crescent-shaped, at first containing oil globules, and 
afterwards divided by septa into three or four divisions. The stylo- 
spores are white and readily escape from the cavities through the some- 
what elongated necks and accumulate in heaps around the mouths of 
the cavities, forming the white spots visible to the naked eye. The 
name of Fusisporium Berenice, B. & C., is given to the white spots in 
Grevillea, June, 1875, p. 147, and the name of Cenangium pythium, 
B. & C., is given to the whole fungus in Grevillea, September, 1875, 
p. 4. The name of sporidia, however, can hardly be applied to the 
spores in “Sprague, No. 5827,” in which, although the spores answer 
perfectly to the description given, yet they are not contained in asci, 
but are properly stylospores. In the “ Bulletin of the Buffalo Society 
of Natural Sciences,” Vol. III. No. 1, p. 25, Cenangium pythium, Fr., 
is mentioned by Cooke as occurring in Salem (S.), Car. (S.), and N. 
Eng. (Sprague). The specimens of Sprague, in Herb. Sprague and 
Herb. Curtis, belong to the species described in Grevillea (1. c.) as 
C. pythium, of Berkeley and Curtis; which is quite different from 
O. pythium of Fries. The reference Salem (S.) and Car. (S.) prob- 
ably relates to the species mentioned by Schweinitz, in “ Syn. Fung. 
Am. Bor.,” No. 1993, and quoted by Curtis, in his “ Catalogue of the 
Plants of North Carolina,” p. 187, which is entirely different from 
Sprague’s plant, and which, although a 7riblidium, does not seem to 
correspond to the specimens of CO. pythium, Fr., in our possession. We 
have received from Professor Bessey an interesting fungus growing on 
Potentilla Norvegica, which corresponds closely to the species figured 
by Albertini and Schweinitz, in “ Consp. Fung.,” Pl. IV. fig. 6, as 
Xyloma herbarum, a species referred by some writers to Phacidium 
repandum, Fr. ‘The species, however, does not agree with the fungus 
of that name on species of Galium distributed by Desmazieres. 
PyRENOMYCETES. — An interesting fungus was found by Mr. Hal- 
sted on an undetermined species of grass growing near the Bussey 
Institution, in the month of July. It first showed itself in the form of 
