Irpex HYDNACE^ 387 



1749. I. fuseoviolaeeus Fr. (from the brown-violet colour of the 



teeth ; fuscUs, brown) a b c. 

 P. coriaceous, silky, zoned, brown-white to ochre-white, zoned 

 brownish. Te. in rows in the form of much incised plates, of 

 the purple-slate-whitish tint seen in the gills of some Pratellce. 



Single to imbricate. Pine, beech ; rare. 2§ in. ; group 4! in. Sometimes 

 there is a considerable development of pileus. 



1750. I. laeteus Fr. (from the milk-white colour; lac, milk) a b c. 



White. 

 P. coriaceous, villous, concentrically sulcate. Te. crowded, 



gyrose in rows, acute, somewhat incised. Irregularly porous at 



marg., becoming ragged at middle and base. 

 Sometimes subimbricate. Mountain-ash, birch, fir, beech. Nov. Group 



1751. I. hypogseus Fuck, (from its sometimes growing in and under 



earth ; Gr. hupo, under, ge, the earth) a b c. 

 Myc. dispersed, white to yellowish. Sub. marg. determinate, com- 

 pactly byssoid, white, then pallid brown-ochreous to dark 

 brown ; hymenium often barren or exhibiting barren patches. 

 Te. irregular, somewhat labyrinthiform, lax, variable in size, 

 straight, incised 2-6 mm. long, base usually compressed, 

 colour as P. 



Woods, pine, investing pine-leaves, twigs, grass, earth, pebbles ; rare. Oct. 

 Group 4^ in. 



1752. I. Johnstonii Berk, (after Dr. George Johnstone) a. 

 Effused, coriaceo-membranous, separable from matrix ; marg. 



naked, reflexed all round, white. Te, compressed, unequal, 

 arranged in rows, resembling the spines of Hydnum, but seated 

 upon fine folds. 

 Dead beech. May be a form of 1750. i\ in. ; group 3 \ in. 



1752a. I. eandidus Weinm. (from the shining white colour ; candidus, 

 white) a. Snow white. 

 Broadly effused, thin, separable, arachnoid, flaxy at the marg. 



Te. subulate, or compressed, thin, toothed. 

 Dead wood, pine. Feb. 



1753. I. spathulatus Fr. (from the shape of the teeth; spafhci, a 



spatula) a b c. 



Effused, membranous, flaxy, then smooth, white to biscuit. Te. 

 entire, somewhat large, reticulato-connected with obsolete 

 veins. Marg. sometimes obsolete, at other times broadly 

 barren, with other barren places on hymenium. Never porous. 



Larch. Nov. 4J in. 



1754. I. obliquus Fr. (from the oblique teeth) a b c. 



Effused, forming an adnate crust, white, clouded and shaded pale 

 sienna ; marg. broadly barren ; circ. flaxy. Te. extended from 



2 c 2 



