248 



HYDNEI. 



Sistotrema. GENUS XXXV. Sistotrema (sisto, to place; rprj^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 off from the pileus. Sporo- 

 phores 4-spored, spores oval. Irreg- 

 ular inform or dimidiate. 



A genus nearest to Irpex t 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. 

 (Yz-\ 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. 



LXXVI. Sistotrema coiifluens. 

 Natural size. Section twice 

 natural size. 



Simple, but csespitose 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. i. p. 426. 

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



Bull. t. 453- f. I. S02V. t. 112. 



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 Dcedalece. 

 Fr. Hym. Eur. p. 619. 



