PLATE 26 
A —A ring of Calvatia cyathiformis producing a second crop of puffballs. The 
sterile bases of the June crop are still present and occur in the outer edge of the 
stimulated area. Eleven fruits and ten old stumps occur in the same portion of the 
ring. This ring is shown in figure 2 as ring 5. The stimulated effect is shown chiefly 
in the Plantago purshii , and is evident for a distance of 1.5 meters in the ring. The 
first crop appeared at the very edge of this area. The second crop shown in this 
illustration is about 30 cm. in advance of this area. Akron, Colo., August 16, 1915. 
A large ring formed by Lepiota morganii, showing a second crop of fruiting 
bodies. The sketch of this ring (fig. 7) shows 10 fresh and about 50 dry fruiting bodies 
from the earlier crop. The vegetation is largely Andropogon scoparius and Bouteloua 
hirsuta , but no effect from the presence of the fungus is noticed on the native growth. 
The ring is about 24 meters across and forms an almost perfect circle. The soil is 
sandy. The young fruiting bodies are about 15 cm. in advance of the old. Twelve 
miles southeast of Yut$a, Colo., August 17, 1915. 
