180 FUNGUS-FLORA. 



Odontia barba-jovis, Fr., Hym. Eur., p. 627 ; Stev., B. F., 

 p. 257. 



On decaying wood. Spreading 12 in. and more. Distin- 

 guished from Badulum quercmum by the fimbriated orange 

 tips of the spines. 



On the under side of wood lying on the ground. Some- 

 times a foot or more broad ; white when young, then yel- 

 lowish rufous ; membranaceous, composed of the finest down, 

 margin byssoid, pure white. Spines simple, about 2 lines 

 long, their tips somewhat penicillate. (Fries.) 



KNIEFFIA. Fr. (figs. 16, 17, p. 149.) 



Hymenium covering the whole exposed surface, destitute 

 of granules and warts, but bearing scattered or fasciculate 

 bristles. Basidium bearing a single sterigma. Broadly effused, 

 thin, and encrusting, or in the most perfect form growing 

 out of cracks in the bark, and assuming various shapes. 



Knieffia, Fr., Epicr., p. 529 ; Stev., Fung., p. 257. 



The minute bristles do not bear the hymeniurn, as is the 

 case with the spines iu Hydnum, but are barren outgrowths 

 from the flat hy menial surface, and in this respect only 

 differing from Corticium. In Peniophora the minute spines 

 covering the hymenium differ in consisting of single large 

 cells cystidia. 



Knieffia setigera. Fr. (figs. 16, 17, p. 149.) 

 White, pale buff when dry, broadly effused, sometimes 

 rather thick and fleshy, at others a mere film, bristles very 

 minute, hyaline, scattered. 



Knieffia setigera, Fr., Epicr., p. 529 ; Stev., Fung., p. 256. 

 Form very variable. Fries says that large specimens 

 reach the size of an apple, but commonly thin and effused. 

 British specimens, so far as I arn aware, are always effused 

 and entirely resupinate, forming a thin white layer that 

 follows the irregularities of the matrix ; superficially re- 

 sembling Grandinia granulosa, but distinguished under a 

 pocket-lens by the minute, bristle-like spines. 



Knieffia subgelatinosa. B. & Br. 



Thin, subgelatinous, yellowish, then pale buff; spines very 

 minute, scattered ; spores broadly elliptical, apiculate, 

 4x 2-5 /*. 



