[Vol. 7 

 212 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



On logs and stumps of Tsuga, Abies, Picea, Taxodium, Pseu- 

 dotsuga, and Larix. Canada to Texas and westward to British 

 Columbia and Washington. May to November. Frequent. 



S. sulcatum may be recognized by its brown, deeply and sharp- 

 ly and concentrically sulcate pileus, ruddy hymenium, incrusted 

 cystidia, and occurrence on conifers. Where the northern 

 hemlock occurs it is usually on this species. S. Chailletii is 

 found on conifers throughout the same northern geographical 

 range, but is much thinner and does not have as large nor 

 incrusted cystidia. In the older herbaria S. sulcatum is often 

 found under the name Stereum rugosum, to which specimens 

 w^ere erroneously referred. 



Specimens examined: 

 Exsiccati: Ell. & Ev., N. Am. Fungi, 1935, under the name 

 Stereum rugosum; Ell. & Ev., Fungi Col., 217, under the 

 name S. rugosum. 

 Canada: J. Macoun, 27, 32, J^3; Lower St. Lawrence Valley, 



J. Macoun, 69a, 76. 

 Ontario: Ottawa, J. Macoun, 234, and in Ell. & Ev., N. Am. 



Fungi, 1935. 

 New Hampshire : North Conway, L. 0. Overholts & H. H. York, 

 comm. by L. O. Overholts, 5033 (in Mo. Bot. Gard. Herb., 

 56350). 

 New York: Floodwood, E. A. Burt, type; Ithaca, G. F. Atkin- 

 son, 2023, 2617, 2636, 5072, 7889, 19398, and C. 0. Smith, 

 comm. by G. F. Atkinson, 8032; North Elba, C. H. Kauf- 

 man, 7 (in Mo. Bot. Gard. Herb., 21821); Pompey, L. M. 

 Underwood, in Ell. & Ev., Fungi Col., 217. 

 Louisiana: Lutcher, H. von Schrenk, 26 (in Mo. Bot. Gard. 



Herb., 42637). 

 Texas: Houston, H. W. Ravenel, 113 (in U. S. Dept. Agr. Herb., 



under the herbarium name Stereum tricolor) . 

 Wisconsin: Ladysmith, C. J. Humphrey, 1908 (in Mo. Bot. 



Gard. Herb., 42917). 

 West Virginia: comm. by W. G. Farlow. 

 Tennessee: Elkmont, C. H. Kaufman, 60 (in Mo. Bot. Gard. 



Herb., 16403). 

 Montana: Gallatin National Forest, Spring Hill, G. G. Hedgcock, 

 comm. by C. J. Humphrey, 2164 (in Mo. Bot. Gard. Herb., 

 10399). 



