HYDNACE JE 
93 
yellowish-brown; several pilei often confluent. Gill-like 
plates entire or toothed (jagged). 5. about i in., attenuated 
below, often somewhat excentric. A scentless brittle species, 
usually terrestrial (sometimes investing sticks, moss, etc.), 
appearing in aut. Uncommon. 
IRPEX 
( Ivpex , a harrow—from the supposed resemblance of the 
hymenial surface to that implement) 
I. obliquus (obliquus, oblique). 
Forms white or pallid patches on stumps and dead 
branches in win. Margin byssoid. Superficially like Poria 
vaporana , but the teeth grow from folds arranged in a 
reticular manner ; those in the centre of the patch are the 
larger, lying upon one another in an imbricated manner. 
RADULUM 
(Radix, a root—from the appearance of the hymenial pro¬ 
cesses) 
R. orbiculare ( orbiculus , a small disc). 
Forms resupinate white or yellowish patches, 1-4 in. diam., 
on dead bark of various trees, chiefly birch, in aut. Often 
dingy flesh-colour in the second season. The tubercles are 
either scattered or in bundles, oblique or erect, tooth-like or 
obtuse. 
RHLEBIA 
(Gr. phleps , a vein—from the appearance of the hymenium) 
P. merismoides (from the resemblance of the wrinkled 
hymenium to the Merismatae section (non-British) of the 
genus Stereum). 
Broadly effused, flesh-colour, orange or red, then dingy 
purple. H. tuberculated or folded, wrinkles crowded, white 
or downy beneath. Margin always delicate and very bright. 
Running over moss on trunks in aut. and win. Uncommon. 
