1916] 



BURT THELEPHORACEAE OF NORTH AMERICA VI 225 



^Washington: Bingen, on Pinus ponderosa, W. N, Suksdorf, 

 860. 



14. H. avellaneus Burt, n. sp. 

 Type : in Burt Herb. 



Fructification effused, soft, membranaceous, 

 separable, upper side between cartridge-buff 

 and olive-buff and under side fuscous, the mar- 

 gin narrow, radiate, colored like the upper sur- 

 face or whitish; in structure 300-400/* thick, 

 with the hyphae snuff-brown under the micro- -p- -^^ 



scope, thick-walled, nodose-septate, rather com- h. avellaneus. 

 pactly interwoven; basidia 4-spored; spores ^q^^^' sporex 

 concolorous with the hyphae, angular-subglo- 

 bose, aculeate, the body 6-7% X 6ju. 



Fructification *5 cm. long, 1 cm. broad. 



On wood of red fir in woods. Washington. October. 



This species is marked by the pale color (nearly avellaneus 

 of Saccardo^s 'Chromotaxia') of the upper surface and mar- 

 gin and the fuscous subiculum. 



Specimens examined: 

 Washington: Olympia, C. J, Humphrey ^ 6305, type. 



15. H. spaxsus Burt, n. sp. 



Type : in Farlow Herb, and in Burt Herb. 



Fructification effused, very thin, byssoid, not 

 forming a membrane, adnate, drab, the margin of 

 the same color, indeterminate; in structure 60- 

 75/A thick, with the hyphae hyaline under the mi- 

 croscope, short-celled, irregular in form and di- 

 Fig. 15 ameter, nodose-septate; basidia 4-spored; spores 

 &pore^^hyi)ha g^^yish olive under the microscope, echinulate, 

 X640. 6-7 X 6/a; no noteworthy color change by KHO 



solution. 

 Fructification 2-3 cm. long, 1-2 cm. broad. 

 On bark of fallen frondose limbs. New Hampshire. Au- 

 gust. 



When better known from other collections, H. sparsus may 

 prove to be H. pawnosus very sparsely developed. At pres- 



