1924] 
BURT—THE THELEPHORACEAE OF NORTH AMERICA. XIII 33 
Specimens of A. bicolor acquire in the herbarium the whitish 
hymenium of a well-fruited A. cervicolor from which they are 
only distinguishable by the even spores and the absence of 
cystidia. On the basis of the similar spores, I formerly referred 
to A. bicolor а small specimen collected in Sweden by Romell. 
Bourdot has recently sent to me from France several specimens, 
published by him under the name A. lazum Bres., which are 
identical in structure with the specimen from Romell and con- 
stantly distinct from our A. bicolor by having occasional cystidia 
and stellate organs with branched rays—so conspicuously 
branched in the hymenium as to approach antler form. 
Specimens examined: 
New York: Floodwood, E. A. Burt. 
Delaware: Wilmington, Commons, 2356, type (in N. Y. Bot. 
Gard. Herb., U. S. Dept. Agr. Herb., and Burt Herb.). 
Maryland: Glen Sligo, C. L. Shear, 1141. 
Louisiana: St. Martinville, A. B. Langlois, ac. 
Kentucky: Crittenden, C. G. Lloyd (in Lloyd Herb., 1401, 1425, 
and Mo. Bot. Gard. Herb., 55616 and 55617 respectively). 
Illinois: Christopher, C. J. Humphrey, 1991 (in Mo. Bot. Gard. - 
Herb., 59018). 
British Columbia: Kootenai Mts., near Salmo, J. Е. Weir, 454, 
495, 520, 541 (in Mo. Bot. Gard. Herb., 13274, 21977, 19438, 
and 3774 respectively). 
4. A. spiniferum Burt, n. sp. 
Type: in Mo. Bot. Gard. Herb. 
Fructifieations effused, with the subiculum avellaneous and 
the hymenium pale pinkish buff; in structure 300-350 u thick, 
with hyphae hyaline, arranged longitudinally along the sub- 
stratum and passing into a loosely arranged layer and becoming 
intermixed with the colored, stellate organs; stellate organs not 
densely crowded together, with unbranched rays 50-90 x 6-7 u 
usually, but next to the hymenium having rays perpendicular 
to the latter, larger than the other rays, up to 130 X 9 и, and 
protruding beyond the basidia up to 110 џ, like setae; cystidia 
not incrusted, 25 x 5 y, sparingly present; spores hyaline, even, 
subglobose, 5-6 џ in diameter. 
