Polyporaceae 



Boietinus. specimens of B. decipiens in the Curtisian Herbarium have only central 

 stems, from which things I suspect that the two species have been con- 

 fused. The spore dimensions here given are derived from a specimen 

 in the Curtis Herbarium, through the kindness of Professor Farlow. 

 Peck, Boleti of the U. S. 



I have not recognized this Boietinus. Its affinities are with excellent 

 edible species. 



B. poro'silS (Berk.) Pk. (Plate CXIII.) PileilS fleshy, viscid when 

 moist, shining, reddish-brown. Flesh 3-9 lines thick, the margin thin 

 and even; hymenium porous, yellow, formed by radiating lamellae a lirie 

 to half a line distant, branching and connected by numerous irregular 

 veins of less prominence and forming large angular pores. Stem lateral, 

 tough, diffused into the pileus, reticulated at the top by the decurrent 

 walls of the tubes, colored like the pileus. Spores semi-ovate. 



Pileus 2-5 in. broad. Stem 6-16 lines long, 4-6 lines thick. 



Var. opa'ctts (Paxillus porosus Berk., Bull. N. Y. State Mus. 2, p. 

 32). Pileus dry, glabrous or subtomentose, not shining, brown or 

 tawny-brown. Spores brownish-ochraceous, 9-nx6-8/A. 



Damp ground in woods and open places. Ohio, Lea, Morgan; North 

 Carolina, Curtis; New England, Frost, Farlow; Wisconsin, Bundy; 

 New York, Peck. 



This species is remarkable for its lateral or eccentric stem. There 

 is often an emargination in the pileus on the side of the stem which 

 gives it a kidney shape. In the typical form it is described as viscid 

 when moist, and the Wisconsin plant is also described as viscid, but in 

 all the New York specimens that I have seen it is dry and sometimes 

 minutely tomentose. I have, therefore, separated these as a variety. 

 The color of the pileus varies from yellowish-brown to reddish-brown or 

 umber. A disagreeable odor is sometimes present. The tubes are 

 rather short and tough and do not easily separate from the hymeno- 

 phore and from each other. In the young plant they are not separable. 

 They sometimes become slightly blue where wounded. As in other 

 species they are pale yellow when young, but become darker or dingy- 

 ochraceous with age. The spores have been described .as bright yel- 

 low, but I do not find them so in the New York plant. The plant is 

 incongruous among the Paxilli by reason of its wholly porous hymenium, 



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