Hydnum HYDNACE^: 373 



Fam. III. HYDNACE^. 



Hymenium inferior in the stipitate and dimidiate species, superior 

 in the resupinate series, bearing from the first persistent spines, teeth, 

 tubercles, papillae or wart-like folds. 



Basidia tetrasporous except in Kneiffia, where they are mono- 

 sporous ; Mucronella, which has been described as monosporous, is 

 sometimes tetrasporous. Species 1687 — 1780 



Key to the Genera. 



Pileate. 



Gelatinous 71 Tremellodon 



Fleshy. Teeth flattened, irregular 72 Sistotrema. 



Pileate or resupinate. Fleshy. Spines acute, distinct at base 70 Hydnum. 



Resupinate. 



Hymenium bearing somewhat acute teeth which spring 



from folds or ridges 73 Irpex. 



Hymenium bearing teeth in the form of coarse 



deformed tubercles 74 Radulum. 



Hymenium covered with folds or wrinkles 75 Phlebia. 



Hymenium covered with granules — 



Apices excavated 76 Grandinia. 



Apices penicellate 77 Odontia. 



Hymenium covered with minute acute spicules 78 Kneiffia. 



Hymenium bearing teeth in the form of long scattered 



usually distant bristles. Subiculum nearly 



obsolete 79 Mu cronella . 



LXX. HYDNUM L. 



(From the Greek name for a truffle, Aydnon, appropriated without 



reason by Linnaaus for this genus.) 



Hymenium inferior in the first four series, superior in the fifth. 

 Spines awl-shaped, acute, distinct at the base. (Fig. 85.) 



Species 1687—1745 



Mesopod^e. Stem central. Terrestrial, chiefly in pine woods. 



a. Carnosce. Pileus fleshy, somewhat fragile, stem solid. 

 Mostly edible. 



Pileus scaly or tomentose. Spines changing colour. 



1687—1690 



Pileus even, smooth. Spines changing colour. 1691 — 1693 



Spines unchangeable, unicolorous, whitish, or pale shades of 



ochre, buff or brownish. 1694—1697 



