HYSTERANGI UM — EHIZOPOGON. 1 5 



Hydnangium cameum, Wallr., MS. ; Mass., Mon. Grast., p. 37, 

 f. 14. 



Underground or partly exposed. About f in. across. 



HYSTEEANGIUM. Vitt. (fig. 4, p. 11.) 



Peridium distinct, separable ; gleba at first mucilaginous, 

 becoming gelatinous, cavities at first empty ; spores minute, 

 smooth. 



Hysterangium, Vitt., Mon. Tub., p. 13; Mass., Mon. Gast., 

 p. 37, f. 4. 



Known by the cartilaginous nature of the mature gleba, 

 separable peridium, and minute elliptical, smooth spores. 

 There is often an abundant development of mycelium. 



Hysterangium nephriticum. Berk. (fig. 4, p. 11.) 

 Spherico-depressed, mycelium vvhite, strand-like ; peridium 



rather thick ; gleba tinted vrith grey or dirty green ; cavities 



minute, irregular, radiating from the base; spores pale, 



elliptical, 18-20 X 5-6 fx. 



Hysterangium nephriticum. Berk., Outl. 294; Cke., Hdbk., 



n. 1050 ; Mass., Mon. Gast., p. 38, f. 4. 



Amongst clay, &c. From i to 1 in., at first white, downy, 



springing from a dense mat of root-like mycelium. 



Hysterangium Thwaitesii. B. & Br. 



White, subglobose, becoming reddish when bruised ; 

 spores oblong, apiculate, pale olive, 25-30 x 7-9 //,. 



Hysterangium Thwaitesii, B. and Br., Ann. Nat. Hist., 

 ser. ii. v. ii. p. 267 ; Mass., Mon. Gast., p. 39, f. 80. 



On the ground, under trees. About J in. across. Peridium 

 thin, separating when dry. 



EHIZOPOGON. Tul. (fig. 3, p. 11.) 



Peridium thick and persistent, or thin and disappearing, 

 with strands of mycelium traversing its surface; cavities 

 distinct, at first empty ; spores smooth. 



Bhizopogm, Tul., Giorn. Bot. Ital. ii. p. 56 ; Mass., Mon. 

 Gast., p. 39. 



Agreeing with Hysterangium in the smooth elliptical spores, 

 but distinguished by the root-like strands of mycelium 



