APPENDIX. 165 



BOLETUS coriaceo-fpongiofus, fejjilis ferruginous, tubis longif- CCxru. 

 Jimis creElis, pons minutis rotundas. refupinam. 



SUPINE BOLETUS. 



TAB. CLXV. 



/ "T"*HIS curious Boletus mod frequently creeps or fpreads upon 

 ■*■ its back ; fometimes it is formed into lumps of a rude tur- 

 ban fbape ; in either cafe it confifts of a thin brown cruft, which 

 clofely embraces the wood on which it grows, and ferves as a bale 

 or ground- work to the tubes. 



The tubes are long, erecl, and conftitute almoft the whole 

 fubftance of the plant. In the fpreading or creeping fpecimens, 

 the margin is unequally lobed and blunt ; the furface made uneven 

 by fwelling bunches ; the colour, like all the other parts, is a nifty 

 brown. The pores round, but are too fmall for the infpeclion of 

 the naked eye. The length of the tubes is different in the creep- 

 ing and the turbanated fpecimens, being fhorter in the firft, longer 

 in the laft variety. They are figured of their natural fize at d. d. d. 

 magnified in two different degrees, at b. c. 



This fpecies is nearly related to the Boletus cryptarum of Bul- 

 liard, I'exte, P. 350. No. 31. and probably may be the fame 

 fpecies, my fpecimens being greatly inferior to his, in point of 

 elegance and perfection of growth. 



I gathered fpecimens of this plant on dry decayed hafle boughs . 

 near Burks-Hall, in February, 1790. 



A a 2 



