[Vol. 13 

 234 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



C. hydnans is intermediate between Corticium and Radulum 

 with granules rather too broad at base, too little elevated and too 

 convex to be a typical Radulum in configuration, and yet always 

 leading one to search for more raduloid teeth. It is well named 

 as C. hydnans or by its later name C. colliculosum. It may be 

 distinguished from Radulum orbiculare in doubtful cases by its 

 lack of gloeocystidia. 



Specimens examined : 

 Exsiccati: Ellis, N. Am. Fungi, 329 and 717 b, the latter under 



the name Corticium suhgiganteum; Ravenel, Fungi Am., 126, 



227, both under the name Corticium calceum; de Thiimen, Myc. 



Univ., 605. 

 Canada: Gasp6, J . Macoun, 530. 

 Ontario: London, J. Dearness, 1178 (in Mo. Bot. Gard. Herb., 



18773). 

 New Hampshire: North Conway, A. S. Rhoads, 7 (in Mo. Bot. 



Gard. Herb., 56893). 

 Vermont: Middlebury, E. A. Burt. 

 Massachusetts: Sprague, 96, type of Corticium colliculosum (in 



Curtis Herb., 5297). 

 New York: Albany, H. D. House (in N. Y. State Mus. Herb., and 



Mo. Bot. Gard. Herb., 14834) ; Alcove, C. L. Shear, 1011, 1212, 



1219; East Galway, E. A. Burt; Grand View, H. von Schrenk (in 



Mo. Bot. Gard. Herb., 42817) ; Ithaca, H. S. Jackson, comm. by 



Cornell Univ. Herb., 14390, and W. H. Long (in Mo. Bot. 



Gard. Herb., 62987); New Baltimore, C. H. Peck, comm. by 



N. Y. State Mus. Herb., T 30 (in Mo. Bot. Gard. Herb., 



56071) ; Trenton Falls, C. H. Peck, comm. by N. Y. State Mus. 



Herb., T 9 (in Mo. Bot. Gard. Herb., 54572). 

 New Jersey: Newfield, J. B. Ellis, and (in N. Y. Bot. Gard. 



Herb., and Mo. Bot. Gard. Herb., 61636) and in Ellis, N. Am. 



Fungi, 717 b, and de Thiimen, Myc. Univ., 605. 

 Pennsylvania: Bethlehem, Schweinitz, type of Radulum hydnans 



(in Schweinitz Herb, and Farlow Herb.) ; Center County, C. R. 



Orton, comm. by L. 0. Overholts, 2940 (in Mo. Bot. Gard. 



Herb., 8265) ; State College, L. 0. Overholts, 3040 (in Mo. Bot. 



Gard. Herb., 5689); Trexlertown, W. Herbst, 3. 

 Maryland: Rock Creek, C. L. Shear, 1046. 



