SOME COMMON MUSHROOMS AND HOW TO KNOW THEM 15 
ARMILLARIA VENTRICOSA 
(Fig. 13) 
In this species the cap is fleshy, convex or nearly plane, smooth, shining 
white, margin thin and involute; the flesh is whitish; the gills are narrow and 
close, decurrent, Sometimes dentate or denticulate on the edge, whitish; the 
FIGURE 13.—Armillaria ventricosa: A, Young specimen; B, mature specimen 
stem is thick and short, ventricose, abruptly pointed at the base; the ring is 
conspicuous, lacerated, and membranaceous. : 
The cap is 4 to 7 inches broad; the stem is 2 to 3 inches long, ventricose por- 
tion 1 to 2 inches broad. 
This is a coarse, conspicuous fungus, It is not reported as widely distributed. 
