1924] 
BURT—THE THELEPHORACEAE OF NORTH AMERICA. XIII 85 
crowded stellate organs of varying size; stellate organs with 
unbranched rays 20-60 x 3-6 а which protrude beyond the 
hymenium in such great numbers and so crowded as to nearly 
conceal the basidia; no cystidia found; basidia simple, 10 X 5 y, 
with 4 sterigmata, but few basidia found; floating spores in each 
preparation are hyaline, even, 4-414 X 3 y, neither copious nor 
seen attached to basidia. 
Fructifications 1-114 mm. long, about 1% mm. broad. 
‘On bark and decorticated wood of Abies. New Hampshire. 
September. 
A. ochrostroma differs from all other species of Asterostroma 
known to me by the presence in its subiculum of some slender, 
rigid, thick-walled hyphae of the same diameter as the usual, 
thin-walled hyphae but of the same color as the stellate organs. 
I find these colored hyphae more abundant in the sterile portions 
of the fructification; they have bleached in sections preserved 
for several years in glycerine mounts. Тһе stellate organs are 
more numerous than in any other of our species and prevent 
cutting satisfactorily thin sections of the hymenium by free hand. 
Some hyaline, even spores 4-414 X 3 џ were found floating in 
each preparation but not abundantly and are probably the 
spores of this species. 
Specimens examined: 
New Hampshire: Crystal Cascade, White Mts., W. G. Farlow, 
1, type (in Mo. Bot. Gard. Herb., 55578). 
(To be continued) 
