2Q2 - BOTANICAL GAZETTE {OCTOBER 
yellow on exposure of the cut surface to the air. In such sections of 
young plants therefore the pileus is clearly marked off from the sur- 
rounding volva, and the wall of the stem is likewise marked off 
distinctly from the surrounding fundamental tissue. The gills are 
also well outlined. The slightly convex outline of their edge does not 
permit them to lie against the surface of the stem, and their lower or 
outer ends curve away from it in the young stage. This space is filled 
with fundamental tissue, and as the plant expands it is left free from 
Fic. 8.—Photomicrograph of spores with Zeiss ocular 18, objective 37; object 
370™m from plate-holder. 
the stem and gills, but attached to the inner side of the base of the 
volva as a collar around the stem. When the plants become quite 
mature or old, there are tissue changes at the base of the stem inside 
of this collar which permits the stem to be very easily separated from 
the volva. By this time the free limb of the volva has recurved more of 
less, leaving the volva in the shape of a saucer with a recurved edge, 
and an inner collar. At this stage, if one takes hold of the cap to lift 
the plant, the stem is freed from the volva cup, leaving this saucer” 
shaped structure in the ground. Fig. 5 is from a photograph of this 
stage, showing this saucer-like structure of the volva with its inne 
collar, and the freed stem at one side. In dry weather this separation 
of the stem from the volva does not take place. 
I have proposed the name Amanita calyptroderma for this plant, 
