304 

 Gen. 31. 



HYDNEI. 



RADULTJM, Fr. El. p. 148. 



Tubercles nide, irregular, com- 

 monly elongated and cylindrical, 

 obtuse, waxy. {Fig. 74.) 



Hymenium anipliigenous, tubercular. 

 Tubercles rough, irregular, generally 

 elongated and cylindrical, obtuse, waxy 

 or fleshy, scattered or fasciculate. A very 

 natural genus of epixylous fungi, resupi- 

 nate, extendpd, usually breaking through 

 the bark. — Fr. Epicr, p. 524. 



Fig. 74. 



874. Radulum oxbiculaire. Fr. " Orbicular Eadulum." 



In the autumn — effused, orbicular, confluent, white, then yel- 

 lowish ; circumference byssoid ; tubercles elongated, irregular, 

 roundish, scattered or fasciculate ; in the spring — waxy or fleshy, 

 smooth, flesh-coloured ; tubercles broader and shorter. — Fr. 

 £picr.p.b24. Grev.t.'278. Eng. Fl. y. p. IQl. BaiLt.29. 



On dead branches of birch. 



Very variable, generally originating beneath the epidermis, 2-3 in. broad, 

 quite membranaceous, or above 2 lines thick, margin byssoid, occasionally 

 ehowing a disposition to become reflexed; hymenium consi!^ting of irregularly 

 disposed, oblique, or erect, tooth-like, obtuse, entire, or laoiniated, often fas- 

 ciculate tubercles, the a]uces sometimes somewhat tomentose. Occasionally 

 they are much scattered and almost resemble spines. — M. J. B. 



875. Radulum quercinum. Fr. " Oak Eadulum." 



innate, crus- 



Somewhat rounded, then broadly confluent, 

 taceous, becoming smooth, white, then pallid ; tubercles 

 rounded, elongated, stout, obtuse, scattered, or fasciculate, irre- 

 gular, floccoso-villose at the apex. — Fr.Epicr.p.b2b. Ray. Syn. 

 t. 1./. 4. Ann. N. H. no. 362. Hydnmn Barha-Jovis, Sow. t. 328. 

 Eng.Fl.Y.p. 159. 



On branches of oak. Rare. 



Adnate, persistent, 2-3 in. long, according to Fries, but Eng. Fl. states — 

 ** Sometimes a foot or more broad, white when young, then yellowish rufous, 

 membranaceous, composed of the finest down, margin byssoid, pure white." 



(Fig. 74.; 



