Mycological Bulletin 



No. 75 LIBRARY 



NEW YORK 



W. A. Kellerman, Ph. D., Ohio State University BOTANICAL 



Columbus, March, 1907. 



Garden. 



TYLOSTOMA CONCLUDED— CORTINARIUS BEGUN 



The valuable monagraph of the stemmed puffballs, Ty-los- 

 to-ina by C. G. Lloyd in his Mycological notes, with admir- 

 able illustrations, we complete in this number. We desire to 

 give our readers some idea of what Mr. Kauffman is doing 

 to increase our knowledge of the large, conspicuous and in- 

 teresting genus Cor-fi-uo-ri-us. We will reproduce a part of 

 his article published in the Botanical Gazette, Torrey Bulletin 

 and the Journal of Mycology with half a dozen or more plates 

 of his new species. 



GROUP 8. 



TYLOSTOMA POCULATUM.— Peridium smooth, pale, with a 

 strongly raised shield-shaped fibrillose mouth. Cortex thick, ?jreakiug away 

 perfectly from the pendium which it leaves perfectly smooth excepting at 

 the base where the thick cortex persists as a kind of cup. Stem pale or 

 slightly colored, sulcate, striate, not scaly, usually thickened below (some- 

 times strongly) with the mycelial, adnate sand. Capillitium subhyaline, 

 or sometimes distinctly colored, sparingly septate, with slightly thickened 

 septa. Spores 5 mic, smooth. 



This is a most peculiarly marked species, both in its mouth and cortex 

 characters and we know no other species having either of the characters 

 so strongly marked. It occurs chiefly in our western states, but we have 

 it also from Australia. No form is known in Europe. Tylostoma minu- 

 tum is, in my opinion, based on a small .specimen of it. It varies in two 

 features, color and roughness of the .spores, and plants so varying have 

 been called species, but to my mind they are so close that they may better 

 he called forms. 



