140 FUNGI. [Polyporus. 



Klotzschy in Hook. Herb.—hhont Edinburgh. Dr Greville. — Resu- 

 pinate, with the upper margin reflexed or dimidiate, imbricated some- 

 what zoned, white and silky. Pores minute, short, yellowish or rich- 

 tawny, pruinose when young. 



18. P. irregularis, Sow (inultiform Polyporus) ; small, pilei 

 thin imbricated and confluent smooth but opaque, pores minute 

 dirty-white A'ery sliallow. — Bol. irregularis, Soiv. t. 423. 



On pine-leaves and old trunks. Highlands of Scotland. Klotzsch, 

 in Hook. Herb. — Sowerby's plant, to which Klotzsch refers his 

 specimens, agrees in every respect, except that he describes the pileus 

 as downy in parts, no appearance of which is exhibited in the specimens 

 before me. 



19. P.betulinvs, Bull. (Birch-tree Polyporus) ; pileus fleshy- 

 smooth pale reddisli-brown furnished with a very short obliquely- 

 vertical obsolete stem, pores unequal white. Fr. SysL Myc, 

 V. 1. p. 358. Grev, Fl. Ed. p. 400. Sc, Crypt. FL t. 229. 

 Postk. l. c. t. 22. Klotzsch, Fung. Germ. exs. n. 32. — Bol. 

 betulimts, Bull. t. 312. Bole. t. 159. Soia. t. 1 12. 



On trunks of dead birch-trees. Summer and autumn: annual. — 

 " Pileus 4 — 6 inches across, smooth, pale reddish-brown when mature, 

 often mottled, roundish or somewhat reniform. Flesh white, very 

 thick. Pores white or tinged with brown, narrow, the orifices toothed, 

 separable from the pileus when fresh, but really concrete with it. 

 Sporulcs white." Grev. I c. Taste and smell acid. Withering's 

 B. betulinus, found on the ash, appears to be a different species. The 

 epidermis is very thin and delicate and easily peels off; when dry the 

 whole plant is very light ; its texture between coriaceous and corky. 



20. P. suaveolens, L. (sweet-scented Polyporus) ; pileus of a 

 fleshy somewhat corky substance zoneless villous white, pores 

 rather lare:e brownisli. Fr. Syst. Myc. v. \. p. 366. Fl. Dan. 

 t. 1849. Klotzsch, Fung. Germ. exs. n. 34. — Bol. suaveolenSf 

 Linn. Sp. PI. p. 1646. — B. scdicinus, Sow. t. 227. — B. suberosus, 

 Bolt. t. 162. 



On Willows : not common. — On a fallen tree, apparently a Poplar, 

 at King's Cliffe, Norths. ; Rev. M. J. ^crAc%.— Generally solitary. 

 When dry, very light and soft, whereas the following becomes hard 

 and has the pores more irregular. Sowerby says that this species 

 generally occurs on the upper part of old willow-stumps, while the 

 next grows on the lower part. An inspection of Sowerby's original 

 specimen enables me to correct the references of Fries. Sowerby's 

 B. salicinus is undoubtedly the same with the species published by 

 Klotzsch as P. suaveolens. 



21. p. salicinus, Grev. (subimbricated Willow Polyporus); 

 sessile or dimidiate, between corky and coriaceous nearly smooth 

 slightly rugged white at length brownish, pores white short 

 irregular. Grev. Fl. Ed. p. 400. — P. suaveolens, var. salicinus, 

 Fr. Syst. Myc. v. I . p. 366. Klotzsch, in Hook. Herb — Bol. 

 suaveolens, Sow. t. 228. 



On Willows, &c., very common. Autumn. — When dry, the present 



