CORTICIUM. 123 



mealy; frequently when growing in damp dark places the 

 whole plant remains arachnoid, with basidia in scattered tufts, 

 and not forming a continuous hymenium. 



Corticium typhae. Fuckel. 



Very thin, longitudinally effused, at first appearing as 

 small, distinct, white, byssoid spots ; hymenium at first 

 smooth, then minutely mealy, and sometimes slightly 

 cracked ; margin sometimes indeterminate and mealy ; spores 

 elliptical, 6 x 3-4 //,. 



Corticium typhae, Fuckel, Symb., p. 27 ; Mass., Mon. Thel., 

 p. 137. 



On dead dry leaves of Typha, Carex, &c. Forming small, 

 elongated patches, hymenium dull buff when dry. 



Corticium sambuci. Fr. 



Broadly effused, subinnate, incrusting and often surround- 

 ing the branch or trunk, indeterminate, pure white, con- 

 tinuous when growing, collapsing and often more or less 

 powdery when dry ; spores elliptical, 8-10 X 5-6 /*. 



Corticium sambuci, Fries., Hym. Eur., p. 660 ; Mass., Mon. 

 Thel., p. 137. 



On elder trunks. Forming broadly effused, thin, insepar- 

 able white patches. 



Corticium lactescens. Berk. 



Broadly effused, closely adnate, rather thick, exuding a 

 whitish watery milk when broken ; margin rather thin, 

 byssoid, sterile; hymenium when dry, smooth, polished, 

 ochraceous, or sometimes reddish, becoming cracked ; spores 

 globose, 4 p.. diameter. 



Corticium lactescens, Berk., Outl., p. 274; Mass., Mon. 

 Thel., p. 138. 



Thelephora salicina, Pers., Myc. Eur. i. p. 133. 



On oak, willow, &c. Forming thickish, broadly effused 

 patches that give out a white milk when broken. Hy- 

 menium usually much cracked when dry. 



Corticium lacunosum. B. & Br. 



Broadly effused, soft, mycelium cinnamon or dirty 

 ochraceous, felt-like, lacunose; hymenium ochraceous or 

 cinnamon, waxy, polished, not cracked when dry, spores 

 elliptical, 7 x 4-5 p.. 



