444 THE ITXGI WHICH CAUSE PLANT DISEASE 



Trogia Fries (p. 443) 



Cap thin, leathery, or membranous, persistent, sessile, irreg- 

 ^_____^ ular; hymenium of branched 



y^^^^:=;^5i|^^^^^ folds, the branches chiefly mar- 



ginal. 



There are some seven species. 

 T. faginea. (Schr.) v. Sch. 

 S])orophore 1-2 cm. broad, 

 beaker-formed or irregular mar- 

 FiG. 31.5.— Trogia faginea. gined; vellow or orange without, 



After Hemungs. ^ ' "^ . °^ . ' 



rarelj' whitish, with fane hairs; 

 ribs concolorous, dichotomous; spores cylindric, 4 x 1-1.5 fi, 

 smooth, colorless. 



It injures birch, beech, hazel, etc. 



Schizophylleae (p. 443) 



Sporophore, leathery, persistent, the cleft gills with recurved 

 margins. A group of but four genera and less than a score of 

 species. 



Key to Ge.\er.\^ of Schizophylleae 



Sporophore leathery, sessile 1. Schizophyllum, p. 444. 



Sporophore fleshy or membranous, stipitate 

 Stipe central 



Cap thin, membranous 2. Rhacophyllus. 



Cap fleshy 4. (Edemansiella. 



Stipe lateral 3. Pterophyllus. 



Schizophyllum Fries 



Cap woolly, upturned, sessile, epixylous; gills cleft, the mar- 

 gins recoiled; te.xture leathery. 



About twelve species. Fig. 316. 



S. alneum (L.) Schr. 



Cap 1-4 cm. wide, white or gray-woolly, upturned, attached 

 excentrically, irregularly saucer-shaped" stem lacking; gills grayish 

 to purplish ; spores subglobose, 2-3 ii. 



