CLASSIFICATION 461 



H. luteus. — Peridium subglobose, wall very thin, soft and silky, 

 white, then brownish, about i in. across ; inside bright yellow 

 (spores smooth, elliptical or ovate, yellowish, 24-28 x-io //.). 



Distinguished by its permanently bright yellow interior, and 

 smooth, papillate, very variable, often triangular spores. Some 

 specimens have but very little smell, others, especially when of large 

 size, have a powerful, very foetid smell. 



Underground in woods, etc. 



H. decoriis. — Peridium subglobose, dingy white, becoming 

 yellowish in places, i-i| in. diam. ; hlac-brown inside, finally 

 blackish ; sterile base almost obsolete (spores broadly elliptical, 

 obtuse, or obtusely apiculate, wrinkled, ochraceous, then brown, 



24-28x13-15/^)- 



Underground in woods, etc. 



H. vulgaris. — Peridium subglobose, irregular in outline, whitish, 

 becoming discoloured, rather soft, up to i in. across ; gleba dingy 

 white, becoming dark brown as the spores mature ; cavities of the 

 gleba rather large, irregular in form ; sterile base minute (spores 

 oblong or oblong-lanceolate, acute, narrowed at the base or point 

 of attachment, wrinkled, blackish Irown when mature, 30-40 x 

 12-14 /x). 



Subglobose, regular, or variously lobed or grooved. 



Underground in woods, etc. 



H. pallidus. — Peridium rounded, somewhat flattened, something 

 like a horse-bean in shape, nearly smooth, Vvhite, then dirty tan- 

 colour, rather soft, |-| in. long ; white within at first, then yellow, 

 finally pale brown ; sterile base obsolete (spores lanceolate, acute, 

 shortly pedicellate, rather rough, 30-36x12-14 /x, brown). 



Closely allied to H. vulgaris, differing in its more acute spores 

 and in general colour. 



On the ground in dry fir woods. 



H. citrinus. — Peridium usually very irregular or deformed, 

 often sulcate or grooved, with a silky sheen, lemon-yellow to golden 

 yellow, gradually becoming rusty black, 5-1I in. across ; inside 

 the same colour as the outside, substance firm (spores lanceolate, 

 apiculate, reddish brown, wrinkled, opaque, 40x17-20 /*). 



When quite young it is often greenish yellow, but this colour soon 

 disappears when rubbed or exposed to the air. The yellow veins in 

 the gleba, subfusiform, dark-coloured, rough spores, and the 

 cheese-like smell, which is communicated to everything in the 

 proximity of the fungus, are its most pronounced distinguishing 

 features. 



Underground, in woods under trees. 



H. olivaceiis. — Peridium angularly globose, at first silk}-, wliitish, 

 becoming rufescent when touched, f-ij in. diam. ; internally 

 whitish at first, then changing from buff to rust}- 'olive ; walls of 



