(Plate CXXXI.) 



HYDNUM SCABROSUM. 

 Natural size. 



Hydnaceae 



Hydnum. H. SCabro'simi Fr. scabrosus, rough. Pileus about i K-4 in. broad . 



brownish-yellow, compactly fleshy, 

 at first top-shaped, then plane above, 

 very convex beneath, at first tomen- 

 tose, then rough with flocci which 

 are fasciculate in the form of minute 

 crowded squamules, slightly repand 

 at the margin. Flesh very thick, 

 white, descending into the stem. 

 Stem very curt, I in. long, and 

 equally thick, round or compressed, 

 dotted with the rudiments of spines 

 decurrent upon it, ash-color, attenu- 

 ated downward, roundish and black- 

 ish at the base. Spines 4 lines long, 



equal, awl-shaped, dingy-rust color, whitish at the apex, at first sight 



grayish-brown. Fries. 



Spores 4~5/* diameter. Massee. 



Hydnum scabrosum is frequently found in Pennsylvania, among pines 



and in mixed woods where pines grow. It occurs at Mt. Gretna, Pa., 



and on Springton Hills under hemlocks. 



The caps are soft, fleshy, and equal to H. repandum in quality. 



H. squamo'sum Schaeff. squama, a scale. PileilS I ^-3 in. across, 

 reddish-brown, fleshy, irregular, depressed, smooth, breaking up into 

 irregular scales. Flesh whitish. Stem curt, attenuated downward, 

 white. Spines grayish-brown, whitish at the apex. Stevenson. 



Spores subglobose, 5 6/* diameter. Massee. 



Pileus smooth and even when young. Flesh whitish. Spores gray- 

 ish-brown. Spines whitish, giving the lower surface a much lighter ap- 

 pearance than the upper. 



Under hemlock and spruce in West Virginia, 1884. Mcllvaine. 



Caps are good when sliced thin and well cooked. 



H. Sllbsquamo'sum Batsch. Pileus fleshy, somewhat convex, sub- 

 umbilicate, brownish-rust color, superficial scales soon dropping off; 

 spotted with brown. Stem stout, unequal, smooth. Spines whitish, 

 becoming brown, apex remaining whitish. 



496 



