610 POLYSTICTUS. IRPEX 



white, "pruniform, 6(4, punctate" Quel. Trunks, fallen branches, and 

 furze stems. Jan. Rare. 



2047. P. ravidus Fr. Sow. Eng. Fung. t. 367, as Boletus heteroclitus. 



Ravidus, greyish. 



P. 10-13 cm., becoming dirty yellow, applanate, effused at the base, 

 imbricate, with rugoso-villose, zone-like markings near the margin. 

 Tubes whitish, short; orifice of pores becoming yellowish, unequal, torn. 

 Flesh white, corky coriaceous, tough. "Spores hyaline, yellow in the 

 mass, cylindrical, slightly curved, 6-8 x 3/x" Sacc. Old willow 

 stumps. Rare. 



2048. P. abietinus (Dicks.) Fr. (= Irpex violaceus (Pers.) Quel.) Grev. 

 Scot. Crypt. Fl. t. 226, as Polyporus abietinus. Abies, fir. 



P. 2-5-8 cm., cinereous white, effuso-reflexed, dimidiate, sometimes 

 resupinate, imbricate, villose, obsoletely zoned. Tubes violaceous, be- 

 coming pale, -5-1 mm. long; orifice of pores concolorous, unequal, torn. 

 Flesh tinged brownish or purplish, thin, coriaceous. Spores white, 

 oblong, 3-4 x 2-2-5/A, curved, 2-3-guttulate. Trunks, and fallen 

 branches of conifers, rarely on beeches. Jan. Dec. Common, (v.v.) 



Irpex Fr. 

 (Irpex, a harrow.) 



Pileus corky coriaceous, or membranaceous, dimidiate, or resupi- 

 nate, sessile. Tubes homogeneous, alveolar at first, then becoming 

 torn into teeth, or plates. Flesh white, or coloured. Spores white, 

 elliptical, oval, globose, cylindrical, or elliptic-oblong ; smooth, or 

 punctate. Cystidia present, or absent. Growing on wood, rarely on 

 the ground. 



I. Pendulous with the p. extended behind. 



2049. I. pendulus (A. & S.) Fr. Pendulus, hanging down. 

 P. 2-5-4 cm., pale yellow, margin white, effused, more or less 



circular, extended behind, pendulous, free above, plicate, adpressedly 

 squamuloso-pilose, or slightly rugulose. Teeth shining white, 2 mm. 

 long, in irregular rows, large, incised. Flesh concolorous, membra- 

 naceous, elastic, very thin. Spores white, "3-5 x 1-5-2 /n" Karst. 

 Pine, and larch sticks. Rare. 



II. Sessile, or effuso-reflexed, marginate. 



2050. I. fusco violaceus Fr. (= Irpex violaceus (Pers.) Quel. ; Poly- 

 stictus abietinus (Dicks.) Fr. sec. Quel.) 



Fuscus, dark; violaceus, violet. 



P. 5-8 cm., white, becoming greyish, or hoary, dimidiate, effuso- 

 reflexed, often imbricate and confluent, zoned, silky. Teeth fuscous 



