COMMON MUSHROOMS OF THE UNITED STATES 



419 



Photograph by George Shiras, 3d 



the pear-shaped puff-baee (Lycopcrdon piriforms) 



It is seen growing on and about the base of a tree (for another illustration of this species, see 

 page 418). The plants are edible as long as the "flesh" is white. 



Photograph by A. G. and B. Leeper 



the skuee- or brain-shaped puff-bale (Calvatia crciniiformis) 



One of the best, so long as the interior is white. Once the color changes, it is very 

 bitter. Should be looked for in the autumn, in thickets by roadsides. About one-third 

 natural size. 



