158 FUNGUS-FLOEA. 



IV. APUS. Sessile, dimidiate. 



Hydnum cirrhatum. Pei-s. 



Pileus 2-4 in. across, simple or imbricated, fleshy, colour 

 variable, white, pale yellow, or with a reddish tinge, attached 

 by a broad lateral surface, expanded ; the upper surface with 

 long, curled, abortive spines ; spines equal, thin, rather tough, 

 pale, ^-f in. long ; spores globose, 3 //. diam. 



Hydnum cirrhatum, Persoon, Syn., p. 558 ; Stev., Fung., 

 p. 240. 



On trunks of various trees. 



Hydnum diversidens. Fries. 



Pileus 2-3 in. across, fleshy and irregularly tuberculose or 

 lobed, sometimes substipitate, whitish or yellowish, upper 

 surface with erect, irregularly-notched teeth ; the margin 

 clothed with club-shaped processes; under surface with 

 simple awl-shaped, regular spines, 3-6 lines long. 



Hydnum diversidens, Fries, S. M. i. p. 411 ; Stev., Fung., 

 p. 240. 



On beech, hornbeam, birch, &c. Eemarkable for the three 

 forms of teeth. Often very irregular in form. 



Hydnum oehraceum. Pers. 



Pilei 1-3 in. across, thin, coriaceous, zoned, ochraceous, 

 effuso-reflexed or entirely resupinate ; spines very minute, 

 ochraceous with a pink linge ; spores subglobose, 5 p. diam. 



Hydnum oehraceum, Pers., Syn., p. 559 ; Stev., Fung., p. 241. 



On dead branches. Readily separable from the matrix. 

 Intermediate between the dimidiate and truly resupinate 

 species. 



V. EESUPINATI. Entirely resupinate. 

 * Spines fuscous or ferruginous. 



Hydnum squalinum. Fr. 



Subiculum pale wood-colour, firm, coriaceous, thick, subor- 

 bicular, 2-3 in. across; spines crowded, stout, compressed, 

 ferruginous, then brownish, 3-4 lines long. 



