[Vor. 5 
340 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
The absence of an intermediate layer is likely to place the 
usual collections of resupinate H. corticolor in the group of 
species with H. corrugata, H. cervina, H. Pellicula, H. tenuis, 
etc., from all of which H. corticolor is distinguishable at sight 
by its great thiekness, drab hymenium, black upper surface of 
reflexed edge, and occurrence on the bark of living tree trunks. 
This species attains its best development in South Carolina 
and Florida. The black upper surface of the reflexed edge 
is a good character for separation from H. unicolor. 
Specimens examined: 
Exsiecati: Ellis, N. Am. Fungi, 408; Ravenel, Fungi Car. З: 
30; Fungi Аш., 121. 
New Jersey: Newfield, J. B. Ellis, in Ellis, N. Am. Fungi, 
Maryland: Takoma Park, C. L. Shear, 1003, 1096. 
South Carolina: H. W. Ravenel, Curtis Herb., 1553 (in Kew 
Herb.), and in Ravenel, Fungi Car. 3 : 30, type distribution. 
Florida: Cocoanut Grove, R. Thaaxter, 79 (in Farlow Herb., 
and in Mo. Bot. Gard. Herb., 43984); Daytona, В. T'haater, 
13 (in Farlow Herb., and in Mo. Bot. Gard. Herb., 43933) ; 
Gainesville, N. L. T. Nelson (in Lloyd Herb., and in Mo. 
Bot. Gard. Herb., 55455), and H. W. Ravenel, in Ravenel, 
Fungi Am., 121. 
Cuba: San Diego de los Banos, Earle € Murrill, 198, comm. 
by N. Y. Bot. Gard. Herb. 
Jamaica: Cinchona, W. A. € Edna L. Murrill, 419, comm. by 
N. Y. Bot. Gard. Herb. 
Grenada: Grand Etang, В. Thaxter, comm. by W. С. Farlow, 
13. 
18. H. arida Karsten in Saec. Syll Fung. 9: 228. 1891; 
Bresadola, Ann. Mye. 1: 93. 1903. 
Hymenochaetella arida Karsten, Finska Vet.-Soc. Bidrag 
Natur och Folk 48 : 428. 1889.—H. laxa Karsten, Finska Vet.- 
Soe. Bidrag Natur och Folk 48:429. 1889.—H ymenochaete 
laxa Karsten in Sace. Syll. Fung. 9:228. 1891.—Corticium 
simulans Berk. & Rav. in Cooke, Grevillea 6 : 132. 1878 (with- 
out deseription but with reference to Ravenel, Fungi Am., 
10); Ravenel, Fungi Car. 5:25 (without description); de 
