LYCOPERDON. 35 



capillitiiim thick, much branched, tapering towards the tips ; 



spores globose, smooth, pedicellate, 5-6 fx. 

 Lycoperdon nigrescens, Vitt., Mon. Lye, p, 176, 

 Bovista nigrescens. Berk., Outl., p. 301, t. 20, f. 5 ; Cke., 



Hdbk., p. 371 ; Mass., Mon. Gast., p. 63, f. 89. 



Dry pastures and heathy places. From 1-2 in. across. 



Closely related to L. plumheum, differing in being generally 



larger, and in having a decided purple tinge in the mass of 



spores. 



Lycoperdon olivaceum. Mass. 



Globose, outer layer of peridium whitish, very thin 

 and fugacious, inner thick, soft, white or pale ochraceoxis, 

 becoming brittle and breaking away in patches above ; mass 

 of spores yellow, then olive ; threads of dense capillitium 

 thin, pale, flaccid, mostly unbranched ; spores globose, 

 smooth, sometimes pedicellate, 5 /a. 



Bovista olivacea, Cke. and Mass., Grev. xvi. p. 77 ; Mass., 

 Mon. Gast., p. 64, f. 67. 



On downs. Externally resembling small forms of 

 L. bovista, but there is no trace of a thickened sterile basal 

 stratum, 1-2 in. across. 



Lycoperdon ammophilum. Lev. 



Broadly obovate, plicate below, and passing into a long, 

 tapering root, outer layer of peridium broken up into 

 tomentose warts, inner layer thin, whitish, dehiscing by a 

 small irregular opening ; mass of spores olive ; threads of 

 capillitium branched, thick walled ; spores globose, smooth, 

 pedicellate, 5-6 /x. 



Bovista ammophila. Lev., Ann. Sci. Nat., ser. 3, vol. ix. 

 p. 129, pi. 9, f. 5 ; Mass., Mon. Gast., p. 04, f. 40. 



On the ground in sandy places. From i-1^ in. high, 

 remarkable for the long, tapering root. 



Lycoperdon cepaeforme. Bull. 

 Sessile, subglobose, outer layer of peridium white, papery, 

 minutely furfuraceous, breaking away in patches, inner 

 persistent, dehiscing by a small apical opening; root long, 

 cord-like ; mass of spores yellow with olive tinge ; threads 

 of capillitium much branched ; spores smooth, globose, often 

 with a short, thick pedicel, 4 /a. 



D 2 



