582 POLYPORUS 



1923. P. imbricatus (Bull.) Fr. (= Polyporus sulphureus (Bull.) Fr. 

 sec. Lloyd.) Rostk. Polyp, t. 21. 



Imbricatus, covered with tiles. 



P. 50-100 cm., yellowish tawny, or buff, becoming pale; margin pale, 

 somewhat zoned, imbricated, very broad, lobed, and undulated, 

 glabrous, sessile, rarely stalked. Tubes pale, becoming dirty yellowish, 

 long, thin; orifice of pores pale, becoming concolorous with the p., 

 minute, round. Flesh becoming fuscous when moist, white when dry, 

 somewhat firm, fibrillosely cheesy. Taste bitter. Smell "like Gentian 

 root" Bulliard, or "seed-cake" W. G. Sm. Oak trunks. June Nov. 

 Rare. 



1924. P. Herbergii (Rostk.) B. & Br. Rostk. Polyp, t. 18. 



Herbergius. 



P. 10-20 cm., bright rusty bay, becoming sulphur yellow towards the 

 margin, imbricated, minutely velvety, becoming almost glabrous, 

 sessile. Tubes pale grey, 4-8 mm. long; orifice of pores pale grey, 

 labyrinthiform, unequal, torn, and toothed. Caespitose. On trunks. 

 Oct. Rare. 



**Flesh deeply coloured. 



1925. P. spongia Fr. (= Polyporus Schweinitzii Fr. sec. Lloyd.) Fr. 

 Icon. t. 180, fig. 2. a-TToyyid, a sponge. 



P. 5-30 cm., brownish ferruginous, becoming tawny ferruginous when 

 dry, dimidiate, connate in broad, dense tufts, or imbricate, then flat- 

 tened, wrinkled, rugulose, strigosely tomentose, sessile, or stalked. 

 Tubes light yellow, becoming brownish, 2mm. long; orifice of pores 

 light yellow, soon becoming brownish, small, round, or angular, entire. 

 Flesh rhubarb colour, becoming paler, spongy, soft, finally fragile. Spores 

 very pale yellow, elliptical, 7 x 4/z. Caespitose. Coniferous stumps. 

 Oct. Nov. Uncommon, (v.v.) 



1926. P. Schweinitzii Fr. Fr. Icon. t. 79, fig. 3. 



Ludwig David von Schweinitz, the American mycologist. 

 P. 10-40 cm., bright tawny, disc becoming date brown with the ex- 

 ception of the yellowish tawny margin, and finally becoming entirely 

 fuscous, regular and plano-cup-shaped, or irregular, dimidiate, and 

 imbricate, rugose, strigosely tomentose, fibrillose. St. 3-12 x 5-6 cm., 

 ferruginous, sometimes wanting, strigose. Tubes greenish yellow, de- 

 current, 3-5 mm. long; orifice of pores greenish yellow, broad, angular, 

 often irregular. Flesh rhubarb colour, becoming fuscous, spongy, then 

 fibrillose, and finally fragile. Spores white, elliptical, 7-8 x 4^i, with 

 a large central gutta. On stumps, and roots of conifers. July Nov. 

 Not uncommon, (v.v.) 



P. rufescens Fr. = Daedalea biennis (Bull.) Quel. 



