PORIA 599 



and gaping open. Spores white, "ovoid pruniform, 6/n" Quel., 

 "allantoid, 46 x 1-25 1*5 /i, hymenial hyphae firm, undulate, not 

 fibulate, 2-4 /A broad" Eomell. Dead wood, and branches of frondose 

 trees. Jan. Dec. Common, (v.v.) 



1992. P. mollusca (Pers.) Fr. Mollusca, soft. 

 P. 1-11 cm., white, sometimes yellowish, effused, thin, soft; margin 



white, byssoid, radiately fibrillose. Pores white, then pale ochraceous, 

 5-1 mm. long, often confined to the centre, or here and there in 

 patches, very small, thin, round, unequal, torn. Spores subglobose, 

 4 x 3-5/i. Stumps, dead wood, and branches of conifers, and on 

 dead leaves. Jan. Dec. Not uncommon, (v.v.) 



1993. P. hybrida (B. & Br.) Massee. Sow. Eng. Fung. t. 289, and 

 t. 387, fig. 6, as Boletus hybridus Sow. Hybrida, a mongrel. 



P. 1-18 cm., white; mycelium thick, forming a dense membrane or 

 creeping branched strings. Pores white, 24 mm. long, in scattered 

 patches, slender, minute. Spores "colourless, elliptic-oblong, 4 x 2ju," 

 Massee. Oak wood, causing the dry rot of ships. Jan. Dec. Rare. 



1994. P. medulla-panis (Pers.) Fr. Fr. Icon. 1. 190, fig. 2, as Polyporus 

 medulla panis (Jacq.). Medulla, pith, crumb; panis, bread. 



P. 5-10 cm., white, becoming yellowish, effused, consisting almost 

 entirely of the pores, determinate, subundulate, firm, separable, 

 smooth ; margin naked, distinct. Pores white, 2-4 mm. long, straight, 

 or oblique, medium sized, entire, pruinose. Spores white, elliptical, 

 3-4 x 1-5-2/Lt. Rotten wood, and dead branches of frondose trees, 

 rarely on the ground. Sept. Feb. Uncommon, (v.v.) 



1995. P. mucida (Pers.) Fr. (= Irpex obliquus (Schrad.) Fr. & sec. 

 Bourd. & Maire.) Mucida, mucid. 



P. 2-15 cm., white, becoming pale, effused, rather thick, up to 12 mm. 

 in depth, subimmersed, soft; margin white, indeterminate, byssoid. 

 Pores white, then pale ochraceous, 1-3 mm. long, medium sized (seated 

 on the crust formed of the mycelium), round, unequal, torn. Spores 

 white, "5-6 x 3-4 p," Karst. Stumps, and dead branches of conifers. 

 Oct. Jan. Uncommon, (v.v.) 



1996. P. vitrea (Pers.) Fr. Vitrea, glassy. 

 P. 1-10 cm., whitish, subhy aline, waxy, broadly and unequally 



effused, 2-4 mm. or more thick, subundulate, indeterminate; margin 

 shining white, thin, villose. Mycelium forming a woody stroma, tough 

 and separable. Pores whitish, hyaline, -5-2 mm. long, straight, or 

 oblique, very small, round, obtuse, entire. Spores "globose, ocellate, 

 hyaline, 4/x; or ovoid, 4 x 2-5/x," Bres. Rotten beech trunks, rarely 

 on dead fir wood. Aug. March. Uncommon, (v.v.) 



