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. 
Fruetifieation effused, soft, membranaceous, 
separable, upper side between cartridge-buff 25 
and olive-buff and under side fuscous, the mar- 
gin narrow, radiate, colored like the upper sur- Дъ 
face or whitish; in structure 300-400и thick, 
with the hyphae snuff-brown under the micro- Fig. 14 
scope, thick-walled, nodose-septate, rather com- н. avellaneus. 
pactly interwoven; basidia 4-spored; spores И три Жл 
concolorous with the hyphae, angular-subglo- 
bose, aculeate, the body 6-7% X би. 
Fructification 5 em. long, 1 em. broad. 
On wood of red fir in woods. Washington. October. 
This species is marked by the pale color (nearly avellaneus 
of Sacecardo’s ‘Chromotaxia’) of the upper surface and mar- 
gin and the fuscous subiculum. 
Specimens examined: 
Washington: Olympia, C. J. Humphrey, 6305, type. 
15. H. sparsus Burt, n. sp. 
Type: in Farlow Herb. and in Burt Herb. 
Fruetifieation effused, very thin, byssoid, not 
forming a membrane, adnate, drab, the margin of 
the same color, indeterminate; in structure 60— 
75 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 
grayish olive under the microscope, echinulate, 
6-7 X би; no noteworthy color change by KHO 
solution. 
Fructification 2-3 em. long, 1-2 em. broad. 
On bark of fallen frondose limbs. New Hampshire. <Au- 
gust. 
When better known from other collections, H. sparsus may 
prove to be H. pannosus very sparsely developed. At pres- 
—« 
Spore, hypha 
x 640. 
