160 CRYPTOGAMIA FUNGI. 



mode of growth, one layer of pores being added or spread 

 over another for perhaps three or four successive times. 

 It is sometimes entirely white, but commonly the pileus 

 is a dark brown, and the porous surface white, in drying 

 sometimes acquiring a yellowish-brown tinge. I have felt 

 considerable difficulty in assigning this fungus a name, but 

 that which I have fixed upon is apt and expressive of its 

 appearance. The figure which gives the best notion of it 

 is that of the Dasdalea albida in Mr PURTON'S Midland 

 Flora, tab. 38 : and that experienced botanist suspects his 

 Daedalea may be a variety of Boletus obliquus, our P. me- 

 dulla-panis. 



6. P. versicolor, imbricate, fan-shaped, plane, the margin thin 

 and acute, upper surface velvetty, circularly zoned ; tubes white, 

 short, with small round orifices. GREV. Fl. Edin. 402. Boletus 

 versicolor, WITH. iv. 362. LIGHTF. Scot. 1036. Sow. Fung. t. 229. 

 HOOK. Scot. ii. 27 



Hab. On decaying trunks of trees, common. 



A beautiful species, ornamented on the upper side with zones 

 of purple, green, olive, and dull yellow or white. The 

 purple zones are often iridescent, and the green ones are 

 velvety, while the others are smooth. 



7. P. abietinus, effused, at length mostly reflexed, thinish, coria- 

 ceous ; upper surface wrinkled, whitish ; pores purple, brownish 

 when old, short, lacerating. GREV. Fl. Edin. 402. Boletus abie- 

 tinus, PURT. Mid. Fl. iii. 242. t. 13. 



Hab. On the fallen and decaying trunks of firs, frequent. 



8. P. vulgaris, u broadly effused, thin, dry, smooth, white ; 

 pores minute, subequal." GREV. FL Edin. 403. 



Hab. On decaying wood, frequent. 



A white coriaceous fungus growing on decaying wood, in 

 patches of an oval or lengthened form, and sometimes se- 

 veral inches in extent. The margin is finely villous. 



90. AURICULARIA. 



OBS. " These plants, when young, lie flat, and are closely at- 

 tached to the substance on which they grow, the upper surface 

 being smooth, but the under surface shaggy, with hairs which 



