296 Setchell : Lycoperdon sculptum 



Explanation of plate 20 



uppermost 



, — «^wiuiu 3 i nguic represents a mature specimen which has lost most 01 toe 

 peridium and gleba, while the left middle figure represents one which has lost all of 

 the upper portion and is reduced to the sterile " stipe." The two lowermost figures 

 show mummified young specimens. All the four specimens just mentioned were col- 

 lected by C. C. Dobie and myself near Emerald Bay, Lake Tahoe, California, and are 

 preserved in the herbarium of the University of California. 



The right middle figure represents a portion of the peridium of a mature speci- 

 men, seen from above. It was collected in Sierra Valley, California, by D. T. Fowler, 

 and is in the herbarium of the University of California. 



All the figures were photographed and are reproduced at one half the diameter of 

 the original specimens. 





