EXPERIMENT STATION BULLETINS. 



207 



inner coat which has changed from white to a yellowish brown. It also 

 occurs commonly in fields, pastures and door yards during the growing 

 season. 



Tlie Cup-Shaped Puff-Bali. (Lycoperdon cyathiforni.) Figs. 11, 21. 



Among the larger pufif-balls the present species is perhaps the most 

 common as well as one of the best for the table. When full grown it is 

 about once or twice the size of one's fist. It is usually in the form of 

 a flattened sphere seated on a narrowed base. 



The covering, at first white, becotnes stained with purplish hues as the 



s a 

 m o 



< 



® £ 



a 



a a 



o ^ 



-a 3 



a O 



-3 M 



1^ 



3 



^ a 

 S o 



3 c 



g 



c 



bc 



Si 



— . CO 



— JS 





;.4 



bn 



fungus matures, cracking into somewhat angular areas and then flaking 

 away when dry thus exposing the purple spore-mass. This the wind scoops 

 out in time leaving only the cuij-shaped base, the lower part of which 

 does not change to a spore-mass (Fig. 21). Old pastures furnish a favor- 

 ite place for this puff-ball where they sometimes occur in groups of sev- 

 eral individuals. 



