22 FUNGITS-FLOEA. 



Scleroderma verrucosum. Pers. 



Peridium thiu above, ochraceoiis or dingy brown, covered 

 with minute warts, siibglobose, continued downwards as a 

 more or less elono;ated stem-like base ; spores umber in the 

 mass ; trama whitish ; spores globose, warted, 10-13 /x. 



Scleroderma verrucosum, Berk., Outl. 303 ; Cke., Ildbk., n. 

 1092 ; Mass., Mon. Gast., p. 50, f. 47. 



On the ground, under trees, &c. Peridium, 1 to 3 in. 

 across, stem ^-2 in. long, thick, lacunose ; sometimes almost 

 sessile, when it approaches S. vulgare, but is distinguished by 

 the thin peridium and absence of purple tinge in the 

 immature spore mass. 



Scleroderma bovista. Fr. 



Subsessile, often irregular, peridium thin, pliant, almost 

 smooth ; tramal walls floccose, yellow, mass of spores olive- 

 brown, spores globose, warted, 10-13 fi. 



Scleroderma hovista, 'Berk., Outl. 303 ; Cke., Hdbk., n. 1091 ; 

 Mass., Mon. Gast., p. 51, f. 36. 



Sandy soil under trees, &c. From 1-2 in. across. Dis- 

 tinguished by the thin, almost smooth peridium, and the 

 yellow tramal walls. 



Scleroderma geaster. Fr. 



Subglobose, sessile, peridium thick, rigid, almost smooth, 

 splitting in an irregularly stellate manner at the apex ; 

 spores warted, 12-16 yu. 



Scleroderma (/easier, Fr., Syst. Myc, iii. p. 46 ; Mass., 

 Mon. Gast, p. 51, f. 35. 



Sandy places. Known by the peridium dehiscing in a 

 stellate manner ; from 1-2 in. across. 



POLYS ACCUM. D.C. (fig. 1, p. 20.) 



Peridium irregularly globose, thick, attenuated down- 

 wards into a stem-like base, dehiscing by disintegration of 

 its upper portion ; gleba with numerous cavities containing 

 peridiola. 



Pohjsaccum, D.C, in Desp. and Eapp., Voy. Bot. i. p. 8 ; 

 Mass., Mon. Gast., p. 52. 



Allied to Scleroderma and distinguished by the cavities of 

 the gleba containing distinct peridiola. 



