Oct. 39, 1917 
Fungus Fairy Rings 
199 
A&72TMS 
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Fig. 2.—A map of an area of 400 by 620 meters, lying just west of the experiment station and north of the 
Chicago, Burlington & Quincy R. R. near Akron, Colo. The dotted line represents a fire break 
plowed each fall and of about 2 meters’ width. This area includes a total of 62 rings or fragments of 
rings: 35 are Agaricus tabularis, 14 Calvatia cyathiformis, 3 Catastoma subterraneum, and 10 are unidenti¬ 
fied rings. No rings of Agaricus campestris were noted in this section, although many grow at other 
places on the plains. From 0.5 to 1 per cent of the total land area here shown lies within the zone of 
influence of these fairy rings. The fruiting bodies at the time the map was made are represented by 
dots. 
