CRYPTOGAMIA FUNGI. 1029 



as to form concentric arches or waves near the 

 rim. 



The gills are thick, deep, coriaceous, and branch- 

 ed, many of them running into one another, 

 and forming various fmufes or labyrinths. 



The rim of the Pileus'is often divided into lobes, 

 and the bafe or centre is fometimes imbricated 

 wich imalier famples of the lame fpecies. 



It is perennial in its nature, and never fades. 



When thoroughly beaten with a hammer, it makes 

 excellent touchwood or tinder. 



4ilneus 22. A, acaulis, lamellis bifidis pulverulentis. Sp. pi. 



1645. (Buxbaum. Cent. 5. tab. 7./. i. Ba^ 



tan a. />• 73. tab. 38. fig-f- d.) 

 Alder Agaric. Anglis. 

 Upon the trunks of trees, and dead wood. XI. 



and III. 

 It is fhaped like the feflor of a circle, or the fhell 



of a bivalve, about half an inch, feldom an 



inch in the Radius. The fubfiance dry and 



coriaceous. 

 It grows either horizontal, or flat, with the gills 



downwards. 

 The upper furface is convex, and r-overed with ^ 



woolly down either of a white or grey color. 

 The gills are grey or lead-color'd, covered with a 



fhort down, vifible with a microfcope, and 

 U u u 3 each 



