[Vol. 13 

 210 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



buff in the herbarium, even, pelliculose, brittle, not shining, the 

 margin whitish, continuous with the substance, fimbriate; in 

 section 160 [x thick, not colored, composed of a layer next the 

 substratum of loosely interwoven, hyaline, thin-walled hyphae 



2 pi in diameter, nodose-septate, not incrusted, and of a compactly 

 interwoven, thin hymenium; no gloeocystidia; basidia 6 X 3 y., 

 with 4 sterigmata; spores hyaline, even, subglobose, 3 X 2-3 \l, 

 copious. 



Fructifications 5 cm. long, 2-3 cm. wide. 



On very rotten frondose wood. Porto Rico. July. 



C. crustulinum is characterized by the loosely attached, whitish- 

 margined fructifications with yellowish hymenium borne on a 

 white, cottony substance. The small hyphae, small basidia, and 

 small spores are good confirmatory characters. We have no 

 closely related species. 



Specimens examined: 

 Porto Rico: Rio Piedras, J. A. Stevenson, 2914, type (in Mo. Bot. 



Gard. Herb., 3130). 



26. C. tessulatum Cooke, Grevillea 6: 132. 1878; Sacc. Syll. 

 Fung. 6 : 619. 1888; Massee, Linn. Soc. Bot. Jour. 27 : 136. 1890. 



Type: type distribution in Ravenel, Fungi Am., 127. 



Fructifications effused, adnate, thin, somewhat membrana- 

 ceous, tender, small pieces separable, in the herbarium becoming 

 naphthalene-yellow, with central parts light ochraceous buff, even, 

 contracting greatly in drying, and cracking into rectangular 

 masses 1-4 mm. in diameter separated by fissures 1-2 mm. wide, 

 with some of the white silky subiculum clinging to the substratum, 

 the margin whitish, fibrillose; in section 150-200 \l thick, not 

 colored, composed of loosely interwoven, very thin-walled and 

 collapsing hyphae 4 ^ in diameter, abundantly nodose-septate, 

 not incrusted; no gloeocystidia; spores hyaline, even, 4-43^ X 



3 pl, few found. 



Fructifications 2-4 cm. in diameter. 



On pine and spruce bark on the ground. Canada to South 

 Carolina, and in Idaho and Arizona. May to October. In- 

 frequent. 



C. tessulatum is somewhat suggestive of C. Berkeleyi in aspect 



