1925] 



BURT — THE THELEPHORACEAE OF NORTH AMERICA. XIV 247 



hair-like, cylindric, obtuse, 3-33-^ [x in diameter, protruding up 

 to 30 |x beyond the basidia; basidia 4-spored; spores hyaline, even, 

 4K X 3-3^ [X, copious. 



Fructifications 2-8 cm. in diameter. 



On bark and wood of fallen decaying trunk of Pinus Strobus. 

 Vermont. December. Rare. 



P. laminata is so suggestive in color and general aspect of the 

 very common Corticium investiens that it is possible P. laminata 

 has been passed by as a thin, young specimen of C. investiens, 

 but the structure of these two species is quite different. The 

 color of P. laminata does not fade in the herbarium; my gathering 

 of nearly thirty years ago still has the color originally noted. 



Specimens examined: 

 Vermont: Middlebury, E. A. Burt, type. 



33. P. guttulifera (Karst.) Sacc. Syll. Fung. 9: 240. 1891; 

 Bourdot & Galzin, Soc. Myc. Fr. Bui. 28: 400. 1913. 



Gloeocystidium guttuliferum Karsten, Finska Vet. Soc. Bidrag 

 Natur och Folk 48 : 430. 1889. 



Type: a portion in Burt Herb. 



Fructifications broadly effused, closely adnate, thin, becoming 

 light bufT to pinkish buff and chamois-colored in the herbarium, 

 more or less studded with minute, hard, globular masses of res- 

 inous color which are visible under a lens but dissolve and disap- 

 pear in aqueous mounts, the margin indeterminate, thinning out; 

 in section 50-160 [x thick, not colored, with the hyphae erect, 

 branching, 3-5 [i in diameter, not incrusted; no gloeocystidia; 

 cystidia heavily incrusted, often obtuse, 40-90 X 10-15 [i, pro- 

 truding up to 60 (x; spores white in a spore collection, even, de- 

 pressed on one side, 7-10 X 3^3^ (x. 



Fructifications 2-5 cm. long, 1-2}/^ cm. wide. 



On decaying wood of Populus, Betula, Acer, and undetermined 

 frondose species. In Europe, and from Canada to Louisiana 

 and westward to Oregon. May to January. Rare. 



The type specimen of P. guttulifera differs from P. pubera in 

 having no gloeocystidia whatever and in bearing on its surface 

 minute, globular, shining masses of such aspect as occur on tips 

 of the granules in Odontia sudans. Such masses are also borne 



