34 FUNGUS-FLOEA. 



sterile base spongy ; spores globose, smooth, 4-6 //,, sometimes 

 pedicellate. 



Lycoperdon bovista, Linn., Sp., pi. 1653; Mass., Mon. Gast., 

 p. 75, f. 76. 



Lycoperdon giganteum, Hussey, vol. i. pi. 26 ; Berk., Eng. 

 FL, v. 5, p. 303 ; Cke., Hdbk., n. 1083. 



Grassy places. Grows to a large size, varying from 4 in. 

 to a foot or more across. 



Lycoperdon Cookei. Mass. 



Hemispherical, flattened below and abruptly contracted 

 into a very short, thick, stem-like abrupt base, peridium 

 minutely areolato-furfuraceous, smoky-brown above, be- 

 coming paler below, dehiscing by a small irregular opening ; 

 cellular sterile base well developed, whitish; capillitium 

 well developed, threads firm, unbranched; mass of spores 

 yellow, then brownish-olive, spores globose, smooth, 4 //,, 

 sometimes pedicellate. 



Lycoperdon Cookei, Mass., Mon. Lycop., n. 32, pi. xiii. 

 figs. 24-26 ; Mass., Mon. Gast., p. 75, f. 26. 



Grassy places. From --f- in. across. 



B. sterile base absent. 

 * Spores globose. 



Lycoperdon plumbeum. Pers. 



Globose, outer layer of peridium thin, whitish, breaking 

 away above, persistent below, inner layer persistent, tough, 

 thin, lead colour, dehiscing by a small irregular opening; 

 mass of spores umber-brown; threads of dense capillitium 

 thick walled, thick, much branched, tapering towards the 

 tips ; spores globose, smooth, generally pedicellate, 5-6 p.. 



Lycoperdon plumbeum, Vitt., Mon. Lye., p. 174. 



Bovista plumbea, Berk., Outl., p. 301, pi. 20, f. 6; Cke., 

 Hdbk., n. 372 ; Mass., Mon. Gast., p. 63, f. 63. 



Dry grassy and heathy places. About 1 in. across. 



Lycoperdon nigrescens. Vitt, (fig. 5, p. 28.) 



Globose, outer layer of peridium whitish, thin, fragile, 



soon breaking away, inner layer tough, persistent, shining, 



blackish-umber, dehiscing by a small irregular opening; 



mass of spores umber with a decided purple tinge ; threads of 



