[Vol. 7 

 210 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



menium even or somewhat tubercular, pallid neutral gray; 

 in structure 200-300 m thick, composed of ascending, densely 

 interwoven hyphae both colored and hyaline, the former 3| m in 

 diameter, with the tips arranged side by side in colored subhy- 

 menial zones, mark the 1-3 strata finally present; cystidia 

 incrusted, cylindric, 30-60 X 8-20 m, sometimes protruding up to 

 20 M beyond the hymenium, starting from all parts of the fructi- 

 fication; spores hyaline, even, 5-7Xl|-2§ m. 



Fructifications 1-2^ mm. in diameter, refiexed 1-2 mm. 

 On dead limbs of alder, chestnut, willow, and other frondose 

 species. Rhode Island to Alabama and westward to Washing- 

 ton and Oregon. March to January. Occasional. 



S. erumpens combines the characters of S. versiforme and 

 Peniophora cinerea; it is more constantly and distinctly refiexed 

 than S. versiforme, always has a gray hymenium, and has quite a 

 different mode of origin from the latter. In the type small 

 blackish bodies burst out from the bark, open at the tip, dis- 

 closing whitish hymenium, and then grow to mature condition. 

 Specimens at hand do not show how such a large resupinate 

 fructification as that collected by E. T. and S. A. Harper, No. 

 819, cited below, does arise, and I may be wrong in referring the 

 specimen to >S. erumpens. An important microscopical detail of 

 S. erumpens is the narrow olivaceous zone of colored hyphal tips 

 at the very base of the basidia of the hymenium. 



Specimens examined: 

 Exsiccati: Ellis, N. Am. Fungi, 720, under the name Corticium 



quercinum var. scutellatum. 

 Rhode Island: Lincoln, F. W. Collins. 

 New York: East Galway, E. A. Burt; Ithaca, C. J. Humphrey, 



2568 (in Mo. Bot. Gard. Herb., 20784); Karner, H. D. 



House (in N. Y. State Mus. Herb, and Mo. Bot. Gard. 



Herb., 55210); New Scotland, C. H. Peck (in N. Y. State 



Mus. Herb., T 28, and Mo. Bot. Gard. Herb., 54658). 

 New Jersey: Newfield, J. B. Ellis, in Ellis, N. Am. Fungi, 720. 

 Maryland: Takoma Park, C. L. Shear, 959. 

 District of Columbia: North Takoma, C. L. Shear, 1043, type. 

 Georgia: Raleigh, R. M. Harper, 2037b, comm. by P. L. Ricker,. 



and (in N. Y. Bot. Gard. Herb, and Mo. Bot. Gard. Herb.^v 



42597). 



