T A B. CLXXXI. 

 AGARICUS QLERCiNLS. Linn. Sp. PL 1644. IViib. 



rj. 4. 307. 



IV'loST common on old oak ports, railing, or cut 

 rtumjis ; being Icart tVccjiicnt on tiic trees themlelvcs. 

 Thcle plants arc attached by a broad bale or back, 

 often alfuming the appearance of a Bo/tlus on the 

 under lule, being full of fuch peculiar cells as to have 

 caufed a doubt of the genus. One fpecimen fre(iuently 

 unites in itlelf the three genera, jij[^aricus, Bo/etuSy and 

 Hydnuni: being lamellated, porous, and with points. 

 The pileus is more or lels rugged, but not at all hairy. 

 Subrtance very much like cork, clumfy, but often 

 formed with the lamellae elegantly dropping into laby- 

 rinths, folds, Sec. 



T A P>. CLXXXII. 



AGARICU.S BETULiNUS. Linn. Sp. PL 1645. With, 

 re. 4. 305. 



A NEATP>R plant than the lalt, growing fometimcs 

 in fimilar fituations, and fre(iuentl)' on Itumps of the 

 Birch {Bitii/a)., whence I fuppofe its name. It is at- 

 tached by a broad bafe or back, and in a young rtatc is 

 truly a Boktus, but in maturity acfpiires very dirtindt 

 lamellx, which finally become cxtremelv thin, rtiff", 

 fomewhat wrinkled, and folded. The Ihorter lamellae 

 end abruptly at right angles. The i>ileus is tomentofc, 

 variegated with different browns, greatly refembling 

 B. verjicolor. Thofe growing on the birch mortly ai- 

 fiime a woolly whitilh furface like plurti. 



r A P>. CLXXXIII. 



AGARICUS ALNEUs. Linn. Sp. PI. 1645. 



1 AM glad to have an opportunity, by favour of the 

 Rev. Mr. Watts, F.L.S. to preilnt my botanical friends 

 with a figme of the true yl^^ariciis ahuus., with fome 

 certainty of its being of Englilh growth. '1 he above 

 gentleman found the elegant fmall united fi)ecimen, 

 No. I. on a beer-barrel in liis c ellar at Alhill, Norfolk. 

 Some fmall ones I gathered in London, by favour of 

 Colonel Patterfon, F.L.S. but the box they grew upon 



