26 ACOTYLEDONS. FUNGI. BvlettlS. 



margin white and downy, veins forming as it were large pores, 

 Merti/ius destntens'j Pers. p. 496. B^'ctus iacnrwncms, 



Wiih.p.yil. Sow. t. 113. 

 HAS. On decayed wood, in cellars and outhouses, and sometimes on 



posts exposed to the weather. On the wood of churches and 



houses, Hopk. 

 The pores contain water. This is the dry-rot, from which buildings of 



all kinds, especially ships, have suffered so much. Mr. Sowerby 



recommends ventilation and avoiding to build in damp situations as 



the best way to guard against it. 



B. BOI.ETOIDF.I. Membrane or receptacle of the fructification 

 forming lubes, ollong and compressed or rounded, sometimes 

 prominent. 



26. D/EDALKA. 



Pileus (dimidiate) between coriaceous and corky, reticulated 

 with subporiform or oblong apertures beneath. (Intermediate 

 between Merulius and Boletus.) 



1. D. quercina, coriaceous pale brownish, pileus slightly wrin- 

 kled glabrous, apertures large, their interstices branched and 

 sinuated. Pers. p. 500. Agaricus quercinus, Lightf.p. 1028. 

 Sou/, t. 181. 



HAB. Trunks of various trees and decayed wood, frequent, all the year 

 round, Light/., Hopk. 



27. BOLETUS. 



Pileus varying in its form. Tubes and pores rounded, entire, se- 

 parated. 



A. Pileus with the tubes beneath distinct from one another 

 (Futulina Bull, and With.). 



1. B. hepatlCUt) fleshy red dimidiate, tubes slender unequal free 

 yellowish. Pers. p. 302. Sow. t. 56. Ugl.ilf. p. 1034. 

 'Fistulina hepatica, With. p. 302. 



HAB, On the trunks of hollow trees. Aug., Sept. Lightf. 



B. Pileus ivilh the tales united. 

 * Stipes central '. 



2. B. aiiranliacus, tubes whitish, pileus red orange, stipes 

 whitish rough. With. p. 305. Sow. t. J 10. jR. auranlitis, 

 Pers.p.Ml. 



HAB. Woods, occasionally. June, July. Bothwell wood, and fre- 

 quent in a small wood near Carmyle, Glasg., Hopk. 



3. B. boviuus, tubes pale yellowish brown unequal in length, 

 pileus brown or olive clammy, stipes thick pale brown with 

 rusty stains. /FzM.p.306. Bol. scaber, Soiv. t. 175. 



8 In this genus likewise I follow NVithcring's characters and names, with 

 fc-vv exceptions. 



