248 



HYDNEI. 



Sistotrema. GENUS XXXV. Sistotrema (sisto, to place; rp^a, a pore. From 

 the arrangement of the pores). Pers. Fr. Syst. Myc. i. p. 426. 



Fleshy, with an inferior hymenium spread over teeth resem- 

 bling broken gills. Gills somewhat waxy, irregularly arranged 



(not radiating), distinct, bent, easily 

 rubbed ofif from the pileus. Sporo- 

 phores 4-spored, spores oval. Irreg- 

 ular inform or dimidiate. 



i x ' 2 ' !L F A I A genus nearest to Irpex, but 



clearly distinct by reason of the gill- 

 like, irregularly arranged, distinct, 

 non-concatenate teeth, and by the 

 fleshy substance. Fr. Hym. Eur. p. 

 618. 



1. S. confluens Pers. Entire, 

 shining white. Pileus 1-2.5 cent. 

 (y*-\ in.) broad, fleshy, irregular, 

 horizontal, villous. Stem 2.5 cent, 

 (i in.) and less long, somewhat ex- 

 centric. Gills (tooth - like plates) 

 flexuous, changeable in form. 



Simple, but caespitose and growing into each other. 



On the ground and sticks. Uncommon. Autumn. 



At length yellowish or tinged with brown. Tooth-like plates of the 

 hymenium entire or jagged. Grev, Name confluo, to flow together. Con- 

 fluent. Pers. Syn. p. 551. Fr. Hym. Eur. p. 619. Syst. Myc. \. p. 426. 

 Berk. Out. p. 262. C. Hbk. n. 869. S. Mycol. Scot. n. 821. Grev. t. 248. 

 Bull. t. 453.^. i. Sow. t. 112. 



LXXVI. Sistotrema confluens. 

 Natural size. Section twice 

 natural size. 



Irpex. GENUS XXXVI. Irpex (irpex, a harrow). Fr. Elench. p. 142. 



Hymenium inferior, toothed from the first. Teeth firm, some- 

 what coriaceous, acute, concrete with the pileus, arranged in 

 rows or like network, connected at the base by folds, which are 

 gill-like (in sessile species) or resemble honeycomb (in resu- 

 pinate ones). Sporophores 4-spored. Growing on wood, some- 

 what sessile or resupinate, approaching Lenzites and Dczdalece. 

 Fr. Hym. Eur. p. 619. 



