578 POLYPORUS 



the disc or beyond, smooth. St. 1-5-5 cm. x 4-12 mm., pale ochra- 

 ceous at the apex, black lower down, central, excentric, or lateral, 

 smooth, tough, firm. Tubes whitish, then ochraceous or cinnamon, de- 

 current, 1-3 mm. long; orifice of pores white, becoming yellowish, 

 small, round. Flesh white, then yellowish, very tough, woody, thin. 

 Spores white, oblong or elliptical, 7 x 2-5-Sju,. Smell slight. Taste 

 bitter. On stumps, trunks, and fallen branches. July Nov. 

 Common, (v.v.) 



1910. P. petaloides Fr. TreraXoz/, a leaf; elSo?, like. 

 P. 56 cm., chestnut fuscous, spathulate, submembranaceous, rugose, 



smooth, flaccid when moist. St. 2 cm. x 8-10 mm., whitish, lateral, 

 ascending, compressed, expanding into the p., smooth, dilated at the 

 base into a shield-like organ of attachment. Tubes shining white, de- 

 current, very short; orifice of pores white, very small. Spores "almost 

 colourless, elliptical, 6 x 2-5-3 /x" Massee. Old stumps. Jan. Rare. 



1911. P. osseus Kalchbr. (= Polyporus albidus (Schaeff.) Quel.) 

 Kalchbr. Icon. t. 34, fig. 2. Osseus, like bone. 



P. 2-5-8 cm., white, becoming yellowish, convex, often imbricate, 

 lobed, smooth. St. white, simple, branched, or obsolete, smooth, hard, 

 firm. Tubes white, decurrent, 1 mm. long; orifice of pores white, 

 round, at length torn, or denticulate, minute. Flesh white, compact, 

 becoming firm. Spores white, subglobose, 4-5 p. Smell somewhat acid. 

 Taste becoming bitter. Larch stumps. Oct. Rare. 



III. P. simple, rarely compound. Stipitate, or caespitose. Flesh soft, 

 or slightly leathery, fragile, or firm, white. Tubes heterogeneous, 

 pores round, or polygonal, of medium size, white. Spores white, or 

 coloured. Annual. Growing on the ground, rarely on wood. 



1912. P. leucomelas (Pers.) Fr. Trans. Brit. Myc. Soc. n, t. 15. 



Xey/eo?, white; yu,e\a9, black. 



P. 4-12 cm., black fuliginous, convex, then expanded, often irregular 

 and lobed, fleshy, fibrillose, disc often squamulose. St. 2-5-10 x 2- 

 3 cm., concolorous, pale at the apex, equal, or tuberous, subtomentose, 

 sometimes squamulose from the breaking up of the cuticle, firm. 

 Tubes white, decurrent, 1-2 mm. long; orifice of pores white, becoming 

 grey, rather large, entire, then torn. Flesh white, reddish when broken, 

 and often blackish in the st., thick, soft. Spores white, subglobose, 

 5-6 ft, warted. Taste slightly bitter. Edible. Coniferous woods. Sept. 

 Oct. Rare, (v.v.) 



1913. P. flavo-virens Berk. <fe Rav. Flavus, yellow; virens, green. 

 P. 8-10 cm., dirty yellowish green, pulvinate, or depressed, irregu- 

 larly lobed, fleshy, subtomentose. St. 5 x 2-3 cm., pallid, subcon- 



