264 BOTANICAL GAZETTE [ocroBE 
Fic. 16. Real size; young carpophores, var. Columbia, showing r rhizomorphs, 
the expanding young pileus and universal veil separated into patches; it is very 
distinct in the two plants where the universal veil is stretched between the two 
caps; at the right a few in longitudinal section. 
Fic. 17. Young carpophore, var. Columbia, about half grown, real he: 
showing a few white patches of universal veil on the pileus, about midway of 
the short stem showing a ring which is the lower part of the double ring; in 
this case separated from the upper part and remaining on the stem as a distinct 
ring as in Agaricus rodmani; upper portion of the veil still attached from stem 
to margin of pileus which is as yet close against the stem. 
PLATE XI. é 
Fic. 18. Cluster of mature carpophores of A cam pestets; cult. 
showing patches of universal veil on pileus. 
1G. 19. Mature and nearly mature plants, var. Columbia, showing ¢ 
veil which forms a sterile margin on the edge of the pileus anda thick ring W 
or corrugated on the upper surface and the edge distinctiy double. 
Fic. 20. Slightly younger stage, also lower part of double veil as | Dn 
away from the outer surface of margin of pileus; upper part of double veil 
attached to margin of pileus. 
The material was selected and fixed in chromo-acetic acid by myself, 
I am under many obligations to Dr. CHARLES E. Lewis, who then took 
material, carried it into paraffin, sectioned, and stained it. : 
