1925] 



BURT THE THELEPHORACEAE OF NORTH AMERICA. XIV 237 



Massachusetts: Magnolia, W. G. Farlow, f; Newton, W. G. 



Farlow. 

 New York: Ithaca, G. F. Atkinson, 144^6; North River, C. H. 



Peck, conim. by N. Y. State Mus. Herb., T5 (in Mo. Bot. 



Gard. Herb., 54569). 

 Missouri: St. Louis, E. A. Burt. 



20. P. montana Burt, n. sp. 

 Type: in Burt Herb. 



Fructifications effused, thin, adnate, tender, whitish to ivory- 

 yellow, widely cracked in drying and showing the loose subiculum 

 on the sides of the crevices, the margin thinning out, somewhat 

 floccose; in section 200-225 jx thick, not colored, composed of 

 loosely interwoven, thin-walled, hyaline hyphae 4-5 [x in di- 

 ameter, not incrusted, not nodose-septate, of irregular outline; 

 no gloeocystidia; cystidia hair-like, not incrusted, conical, taper- 

 ing to a sharp apex, 6-9 [x in diameter at the base, protruding 

 up to 40 [jl; spores hyaline, even, cylindric, slightly curved, 12- 

 14 X 4-5 [X. 



Fragmentary fructification 4 cm. long, 1 cm. wide. 



On badly decayed coniferous wood at an altitude of 10,000 ft. 

 Colorado. July. Rare. 



P. montana is noteworthy by having spores as large as those of 

 P. mutata, but the fructifications are thinner and more tender 

 than those of P. mutata and occur on coniferous wood and have 

 no gloeocystidia. 



Specimens examined: 

 Colorado: Ouray, C. L. Shear, 1188, type. 



21. P. terricola Burt, n. sp. 

 Type: in Burt Herb. 



Fructifications effused, thin, closely adnate, somewhat mem- 

 branaceous, white, not waxy, the margin indeterminate, thinning 

 out; in section 100-200 (x thick, not colored, composed of sub- 

 erect, branching hyphae 3-6 (x in diameter, incrusted, densely 

 interwoven and with more or less sand intermixed ; no gloeocys- 

 tidia; cystidia not incrusted, cylindric, 4-6 [x in diameter, pro- 

 truding 20-50 [x beyond the basidia; spores hyaline, even, 4-6 

 X 3-4 [X. 



