A NEW BOLETUS FROM MEXICO 



W. A. MURRILL 



During a recent exploring expedition in southern Mexico, 

 diligent search was made for species of Boletaceae, but only one j 

 plant was found, which proved to be undescribed. 



Only seven species of this family were previously known from 

 tropical America."^ 



Ceriomyces jalapensis sp. nov. 



Pileus small, convex, circular in outline, 2.2 cm. in diameter, 

 I cm. thick ; surface isabelline to fulvous, slimy, smooth : con- 

 text white to faintly roseus, mild to the taste, 2 mm. thick be- 

 hind ; hymenium convex, depressed in the form of a crater about 

 the stipe, tubes pale-greenish, 7 mm. long, mouths large, rounded, 

 1-2 to a mm., edges thin : spores eUipsoid, deep-ferruginous, dis- 

 tinctly longitudinally striate, copious, 13-15 X7"9/^* stipe cen- 

 tral, slender, tapering upward, concolorous, smooth, glabrous, 

 not conspicuously slimy like the cap, swollen and white at the 

 base, 6 cm. long, 4 mm. thick at the middle. 



Type collected near Jalapa, Mexico, at an elevation of 1,700 

 meters, in humus in a virgin forest, December 12-20, 1909, 

 W. A. & Edna L. Murrill 354. 



* Mycologia i : 219. 1909. 



248 



