534 COMPARATIVE MORPHOLOGY OF FUNGI 



(Maire, 1902; Juel, 1916). The structure of the hymenia and basidia 

 agree with that of the stichobasidial Clavariaceae. As in the latter, the 

 diploid nucleus usually, but not always, divides thrice into eight nuclei; 

 the number of sterigmata is variable, e.g., Cantharellus cibarius five to 

 seven, mostly six (Fig. 271), C. cinereus and C. tubaeformis two to five, 

 mostly four, Craterellus lutescens three to five, mostly five, and C. cornu- 

 copioides two to four, mostly two (Fig. 353, 1 to 5). The fate of the 

 remaining nuclei has not been carefully followed. The basidiospores are 

 smooth, hyaline or slightly yellowish. 



The fructifications of Thelephora correspond to those of the stipitate 

 species of Stereum or Lachnocladium, being leathery or woody, and more 

 or less infundibuliform or branched. Their hymenium is smooth and 

 confined to the lower surface of the pileus. The basidiospores are echinu- 

 late and colored, as in Hypochnus of the Corticiaceae. 



The fructifications of Hydnum repandum bear long teeth on the under 

 side of the pileus, as in the higher Radulaceae. Since this species is the 

 nomenclatorial type of Hydnum, the traditional family, Hydnaceae, is 

 considered under the Radulaceae (p. 442). 



