BASIDIOMYCETES. 



175 



and capillitia. G. coliformis has several apertures in the inner peridium. The 

 other species have only one regular aperture at the apex. G. striatus has a 

 pedicellate inner peridium, with conical, striped peristome. G. fomicatus has 

 an external peridium split into four segments. This last and several other 

 species produce " mycorhiza " on the roots of Conifers. 



Fis.181. I Hymenogaster citrinus (nat. size) ; II longitudinal section through H. tener 

 (x 5) ; III portion of a section of H. calosporus ; g a chamber ; ft hymenium; sp. spores; 

 t trama (x 178) ; IV Rhizopogon luteolus (nat. size); V Scleroderma vulgare, VI section of V; 

 VII basidia with spores belonging to the same Fungus. 



Order 3. Sclerodermataceae. Capillitium wanting. The 

 peridium is simple and thick, gleba with round, closed cham- 

 bers, which are filled with basidia. 



Scleroderma has a corky peridium. The fruit-bodies commence their develop- 

 ment under ground. S. vulgare (Fig. 181 V-VII), has a hard, slaty-black gleba. 

 W. B. N 



