233 



ORDER III. HYDNEI. 



Hymenium inferior or amphigenous, from the first figurate, 

 and definitely but variously protuberant in the form of persistent 

 spines, teeth, tubercles, crests, papillse. Sporophore sometimes 

 single-spored. The greater part are resupinate and effused, and 

 hence they are inferior to the Agaricini, which are commonly 

 circular on a central stem, and to the Polyporei, which are most 

 frequently dimidiate. Fr. Hym. Eur.p. 598. 



GENUS XXXII. Hydnum (SSvov, the Greek name for a kind Hydnum. 

 of edible fungus). Linn. Gen. Plant. 



Hymenium inferior, aculeate; spines awl-shaped, distinct at 

 the base. The central genus of the order, various, analogous 

 with the Polypori. Fr. Hym. Eur. 

 p. 598. 



I. MESOPUS (/u.eo-6?, middle ; TTOVS, a foot). 

 Entire, simple, with a central stem. All 

 growing on the ground and chiefly in pine 

 woods. 



f Carnosa. Pileus fleshy, somewhat fra- 

 gile. Most of them edible. 



* Spines changing colour, pileus scaly or 

 tomentose. 



** Spines changing colour, pileus even, 

 smooth. 



*** Spines unchangeable, unicolorous, 

 whitish. 



tf Lignosa. Pileus corky or coriaceous, 

 tough. 



* Spines changing colour, and, as well as 

 the spores, somewhat fuscous. 



** Spines changing colour, and, as well as 

 the spores, ferruginous. 



*** Spines unchangeable and spores whit- 

 ish. 



II. PLEUKOPUS 

 lateral. 



III. MERISMA 

 and immarginate. 



* Very much branched. 



** Simple, tnberculiform, immarginate 



LXXIII. Hydnum repandum. 

 One-third natural size. Section 

 twice natural size. 



v, the side ; TTOUS, a foot). Somewhat dimidiate, stem 

 ifri, to divide). Very much branched or tuberculiform 



