492 



HYMENOGASTRACE^E 



Rhizopogon 



2109. R. luteolus Fr. (from the dull yellowish colour when half- 

 mature ; luteolus t yellowish) a b c. 



Irregularly subglobose or ovate. Pe. thick, subcoriaceous, whitish 

 to dull yellow and olive- or nut-brown. Gleba black with 

 white septa. 



Solitary or gregarious. Subterranean or partly exposed. Taste insipid ; 

 odour at first weak then strong and offensive. Sandy fir-woods, under 

 beech. Sept.-Oct. Diam. if in. 



CXXVIII. HYMENOGASTER Vitt. 



(From the usually thin peridium ; Gr. humen^ a membrane, 

 gaster^ the belly.) 



Globose or irregular. Peridium fleshy or thin, simple, homo- 

 geneous, running down into a sterile base, except 2116. Cavities of 

 gleba at first empty, radiating from the base or irregularly scattered. 



Fig. 145. A, B, Hymenogaster tener Berk., entire and in section. X \. 

 c, basidium and spores. X 660. 



Trama composed of elongate cells, not of byssoid flocci,'not easily 

 separable. Spores 1-4. (Fig. 145.) 



All the species are nearly superficial in growth, none are edible. 



Species 21102122 



2110. H. Klotzsehii Tul. (after Johann Friedrich Klotzsch) a b c. 

 Irregularly globose to kidney-shaped. Pe. adpressedly downy, 

 fibrillose at base, dull white becoming yellowish. Gl. pallid, 

 becoming rufous-ochre. 

 Sandy soil. Dec. Diam. f in. 



