xl INTRODUCTION. 



GENUS XIX. BOLETUS. 



A Fungus, expanded, on the under fide, into pores or fmall tubes, 

 joined together, and bearing feeds. Thefe tubes or pores fometimes feem, 

 only paired to the fleih, at others they are united with, and are, feemingly 

 a prolongation of it. 



Nature itfelf indicates a double divifion of the Boleti. The firfr. divi- 

 fion includes thofe with tubes or pores, fo loofely adhering to the fleih, as 

 to be eafily feparated from it. The fecond includes thofe with tubes or 

 pores, proceeding from the fleih itfelf, or cohering very clofely with it. 



In the general index, annexed to this appendix, I have not been under 

 a neceffity of collecting together the fynonyma of authors, as they are 

 given at the head of the descriptions of the fpecies refpectively. The re- 

 ferences in this index are directed chiefly to the bell figures, given by 

 authors of good repute. If I have taken the liberty of citing feveral of 

 their figures and names under one fpecies, it has not been done, but where 

 I have myfelf feen the plant under notice putting on, in fome of its Itates 

 or ftages, an appearance well agreeing with the figures and defcriptions 

 given of fuch varieties (if I may be allowed to call them fo). I could 

 produce many inflances to illuftrate my prefent meaning, but one mail 

 fuffice. 



In Schoeffer's Hillory of FungulTes, Tab. 105. is the figure of a 

 plant he calls Boletus olivaceus, Tab. 112. Boletus crafTipes. Tab. 126. 

 Beletus ferrugineus. Tab. 130. Boletus appendiculatus. Tab. 133. Bo- 

 letus cypreus. Tab. 134 and 135, Boletus bulbofus, and Tab. 315, 

 Boletus terreus. I am well convinced, from obfervation, that the figures 

 on the above eight plates, were all taken from one individual fpecies, the 

 common yellow Boletus. I will not pofitively affert that they are fo, but 

 I am fure that fpecimens, fufficiently agreeing with all thefe figures, have 

 at various times, fallen' under my notice. I have gathered them, examined 

 them, and paffed them by as varieties of the Boletus luteus ; and yet 



SCHOEFFEK 



