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 a small specimen collected in Sweden by Romell. 

 Bourdot has recently sent to me from France several specimens, 

 pubHshed by him under the name A. laxum 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: Flood wood, 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, II4I. 

 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, /. R. Weir, 454, 



495, 620, 541 (in Mo. Bot. Gard. Herb., 13274, 21977, 19438, 



and 3774 respectively). 



4. A. spiniferum Burt, n. sp. 



Type: in Mo. Bot. Gard. Herb. 



Fructifications effused, with the subiculum avellaneous and 

 the hymenium pale pinkish buff; in structure 300-350 (x 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 ti 

 usually, but next to the hymenium having rays perpendicular 

 to the latter, larger than the other rays, up to 130 X 9 ji, and 

 protruding beyond the basidia up to 110 ix, like setae; cystidia 

 not incrusted, 25 X 5 [i, sparingly present; spores hyaUne, even, 

 subglobose, 5-6 (x in diameter. 



