1916] 



BUKT THELEPHORACEAE OF NORTH AMERICA VI 227 



granosa Berk. & Curtis, Grevillea 1:149. 1873; Sacc. Syll. 

 Fung. 6:546. 1888. Hypochnus granosus (Berk. & Curtis) 

 Bresadola, Ann. Myc. 1:108. 1903. Zygodesmus bicolor 

 Cooke & Ellis, Grevillea 7:6. 1878. 

 Type: in Herb. Schweinitz. 



Fructification effused, membranaceous, separable, drying 

 Chaetura-drab to fuscous, the margin much paler, brownish 

 and floccose ; hymenium distinctly and close- 

 ly granular; in section 300-400/x thick, with 

 hyphae 3^^* in diameter, nodose-septate, 

 somewhat colored, thin-walled, a few running 

 along the substratum, or forming rope-like 

 strands, and sending out suberect, loosely ^^^- ^^ 



interwoven branches which form the greater Spore, ^hyphai 

 part of the fructification ; KHO solution cans- strandx640. 

 es an immediate change of color in the tissue 

 of the granules to between blue-green and sage-green when 

 added to bits of the fructification in microscopic prepara- 

 tions; spores concolorous with the fructification, angular- 

 subglobose, aculeate, the spore body 5-6 X 4-5)u. 

 Fructifications 1-5 cm. long, 1-4 cm. broad. 

 On rotten wood, both coniferous and f rondose. New Hamp- 

 shire to South Carolina and Alabama. August to January. 

 The fuscous color of the central portion of the fructifica- 

 tion, paler margin, and occurrence of granules about 4 to the 

 mm. afford a good combination of characters for the recog- 

 nition of H. hotryoides by microscopic characters. Occasion- 

 ally a fructification may vary towards Mars-brown. The 

 blue-green color produced in the granules in microscopic 

 preparations by adding KHO solution is a good positive char- 

 acter for this species, but is merely temporary. 



Specimens examined: 

 Exsiccati: Ellis, N. Am. Fungi, 420, under the name Zygo- 

 desmus bicolor C. & E. 

 New Hampshire : Chocorua, W. G. Farlow, 12, and also a col- 

 lection of Sept., 1915 (in Farlow Herb, and in Mo. Bot. Gard. 

 Herb., 8930). 

 Vermont : Middlebury, E. A. Burt, two collections. 



