Report of the Botanist. 91 



lar, suiTOunded by tlie ruptured epidermis ; spores subglobose, 

 rougli, .0012' in diameter, orange, with a thick hyaline epispore. 



Upper surface of leaves of Ledum latifolium. Summit of Mt. 

 Marcy. July. 



This seems to me to be quite distinct from U. Ledi A. & S. 

 which is said to grow on the lower surface of leaves of Z. pcdustre 

 and to form yellow spots. 



Peridermium Cerebru:m Peck. 



Peridia large, convex, erumpent, irregularly confluent, forming 

 brain-like convolutions, white, rupturing irregularly, the cells 

 granulose, radiate-striate on the margin ; spores variable, ovate 

 elliptical or subglobose, rough, yellow, .0008' to .0011' long. 



Trunks and branches of young pines, Pinus rigida. Center. 

 May. 



This fungus forms excrescences from half an inch to two inches 

 in diameter on the trunks and branches. On the smaller branches 

 the excrescence puffs out equally on all sides of the branch. The 

 outer bark comes oiF in large scales, revealing the bright yellow 

 fungus which has produced the unseemly swelling. 



This plant was first detected by Mr. J. A. Lintner, who brought 

 me specimens and made known its locality. 



Cystopus cubicus Str. 



Leaves of Canada thistle. Buffalo. Clinton. 



EcESTELiA AURANTiACA Peclt. (Plate 1, figs. 10-12.) 



Peridia deeply seated, cylindrical, fragile, soon lacerated, fuga- 

 cious, white ; spores subglobose, bright orange, about .001' in 

 diameter, with a thick hyaline epispore. 



Fruit of Amelanchier Canadensis, ^ew Baltimore. ZahrisYie. 

 Keene. July. Also on the fruit of Crataegus. Buffalo. Clinton. 



It is remarkable that this species should have entirely escaped 

 the notice of collectors hitherto and that it should now be detected, 

 in one season, in three widely separated localities, by three differ- 

 ent persons. The color of the spores will enable this plant to be 

 readily distinguished from its congeners. It seems to occur on the 

 unripe fruit only. The Amelanchier leaves and fruit are inhabited 

 by three species of Koestelia. 



JEciDiuM cRAssuM Pevs. 



Leaves of buckthorn, ^Aay/i;i?^5 catharticus. Albany. June. 



^ciDiuM Calthje Grev. 



Leaves and petioles of Caltlia jpahistris. Guilderland. May. 



