c ' 



193 



* 

 ^ 



Decades or Fungi ; hy the Rev. M. J. Berkeley, M.A., r.L.S. 



Decades LYII.-LVlil. 

 (With Plates v., VI., IX., X.)v 



Rio Negro Fungi. 



{Continued from 'p, 171.) 



561. P. (Pleuropus) semiclausns, n. s. ; pileo rigido coriaceo flabel- 

 liformi sublobato urabrino zonis brunneis picto subsericeo, margine 

 acuto ; stipite laterali compresso ; hymenio pallido ; poris ocellatis ; 

 contextu fermgineo. Spruce, n. 56, 200. 



Hab. Oa decaying trunks. Panure. February, 1853. 



Pilaus 2-4i inches across, rigid, coriaceous, deep umber, slightly 

 lobed, marked with many concentric zones, obscurely silky, lineato- 

 rugose ; substance ferruginous. Stem lateral, elongated or almost ob- 

 solete, very variable in length and thickness, umber, pruinosc. Hyme- 

 nium pale ; pores ocellate ; trama even or sulcate. 



There are three different forms of this species, one with a slender 

 stem and smaller pileus, which is nearly even or rugose ; another with 

 a broader pileus and stouter stem ; and a third with a pileus attached 

 by an orbicular disc, or even entirely stemless. These all agree in 

 colour, substance, and pores, and I am therefore obliged to consider 

 them as one and the same species. The species is moreover closely con- 

 nected with P. hrunneo-jiidus, which exhibits the Porotheloid characters 

 of the hymcnium more certainly. In the present case the structure is 

 ■ the same, but every part of the hymenium does not show it equally. 



562. P. (Pleuropus) variabilis, n.s.; pileo convcxo coriaceo ex ellip- 

 tico reniformi umbrino zonis brunneis picto subhcvi ; stipite elato um- 

 brino pruinoso ; hymenio e piano concavo pallida umbrino ; poris pa- 

 pillffiformibus. Spruce, n. 57, 183, 207. (Tab. IX. fig. 1.) ^ 



Hab. On the ground in woods. February, 1853. Panure. 



Pileus \-2\ inches across, convex, coriaceous, eUiptic. and finally 

 reniform, umber, with very few zones or beautifully banded with brown, 

 nearly even or sHghtly undulated ; substance pale. Stem 4-9 inches 

 high, 1-3 lines thick, umber, pruinose, lateral, passing up to the apex of 

 the pileus so as to leave the border in many cases quite free. Hyme- 

 nium plane, then convex ; papilte distinct or only marked by wavy 



furrows, each little area enclosing several pores. 



2 c 



VOL. VIII. 



