[Vol. 12 

 220 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



mersed throughout an outer zone up to 150 \i thick; basidiospores 

 hyaline, even, 4-6 X 2-23^ [x. 



Fructifications up to 10 cm. in diameter. 



On bark of conifers. New York and Ontario, and in Montana, 

 Idaho, British Columbia, Oregon, and New Mexico. August to 

 October. Rare. 



P. globifera is either known only from the type collection or else 

 it is an extreme form of P. gigantea, for each of the more recent 

 gatherings cited below has some character approaching P. gi- 

 gantea. The distinctive features of the type of P. globifera are 

 whiter color, much more num^erous and larger cystidia which are 

 also more coarsely incrusted, and a hymenial surface with some 

 convex granules like those of Grandinia granulosa. The original 

 description is erroneous in stating that the fructifications are 

 closely adnate and that the spores are globose and 3 [x in diameter. 



Specimens examined: 

 Ontario: Ottawa, McKay's Lake, J. Macoun, 175, type (in N. Y. 



Bot. Gard. Herb.) and a specimen from the type collection, 



comm. by J. Macoun; Harraby, E. T. & S. A. Harper, 680; 



St. Lawrence Valley, J. Macoun, 85. 

 New York: Mt. Mclntyre, C. H. Peck (in N. Y. State Mus. Herb., 



and Mo. Bot. Gard. Herb., 55777). 

 Montana: Rockhill, E. E. Hubert, coram, by J. R. Weir, 11960 



(in Mo. Bot. Gard. Herb., 63317). 

 Idaho: Coolin, J. R. Weir, 11158M, 11491 (in Mo. Bot. Gard. 



Herb., 63254, 63279) ; Priest River, /. R. Weir, 20. 

 British Columbia: Kootenai Mts. near Salmo, J. R. Weir, 517, 



525 (in Mo. Bot. Gard. Herb., 5068, 19430). 

 Oregon: Portland, C. J. Humphrey, 6126. 

 New Mexico: Cloudcroft, W. H. Long, 19524 (in Mo. Bot. Gard. 



Herb., 44765). 



3. P. arachnoidea Burt, n. sp. 



Type: in N. Y. Bot. Gard. Herb, and Burt Herb. 



Fructifications effused, very thin, fragile, small pieces separ- 

 able, white, becoming cartridge-buff in the herbarium, the hy- 

 menium continuous, not shining, fragile, loosely supported on an 

 arachnoid subiculum, the margin delicately fibrillose or arach- 



