1920] 



BURT THELEPHORACEAE OF NORTH AMERICA. XII 99 



(in Mo. Bot. Gard. Herb., 8407); Geddes, G. E. Morris, G; 



Ithaca, C Thorn (in Cornell Univ. Herb., 9992) ; James ville, 



H. D. House (in N. Y. State Mus. Herb, and in Mo. Bot. 



Gard. Herb., 55498), and L. M. Underwood; Lowville, 



C. H. Peck (in N. Y. State Mus. Herb.); Orville, G. E. 



Morris, G. 

 Ohio: Gnaddenhutte, Schweinitz, type (in Herb. Schweinitz 



and in Curtis Herb.). 

 Missouri: Valley Park, E. A. Burt & L. 0. Overholts (in Mo. 



Bot. Gard. Herb., 44059). 

 Alabama: Montgomery, R. P. Burke, 25 (in Mo. Bot. Gard. 



Herb., 13146.). 

 Washington: Seattle, W. A. Murrill, 128, US, 1U (in N. Y. 



Bot. Gard. Herb, and Mo. Bot. Gard. Herb., 55745, 55729, 



55726). 

 California: Tamalpais, H. W. Harkness (under the herbarium 



name Thelephora Harknessii Peck in N. Y. State Mus. 



Herb, and Mo. Bot. Gard. Herb., 55925). 



ii. S. exiguum (Peck) Burt, n. comb. Plate 2, fig. 10. 



Thelephora exigua Peck, N. Y. State Mus. Bui. 54 : 953. 1902 ; 

 Sacc. Syll. Fung. 17: 161. 1905. 



Type: in N. Y. State Mus. Herb, and in Burt Herb. 



Pileus coriaceous-membranaceous, very thin, diaphanous, 

 infundibuliform, radiately fibrous-striate, becoming bister in the 

 herbarium, originally "pale alutaceous" according to Peck, the 

 margin lacerate; stem slender, solid, pruinose, and bearing a 

 few whitish hairs which are present also on the ground about the 

 base; pileus in section 100 11 thick, composed of longitudinally 

 arranged, hyaline hyphae 2J 3 /x in diameter, closely crowded 

 together; cystidia hair-like, not incrusted, cylindric, obtuse, 

 7 m in diameter, protruding 25 m beyond the basidia; spores 

 hyaline, even, 4JX2 n, borne 4 to a basidium. 



Fructifications 1-3 mm. in diameter, 3-5 mm. high; stem 2 

 mm. long, J-J mm. in diameter; pileus T V mm. thick. 



On the ground, Westport, New York. October. 



S. exiguum is miniature S. diaphanum of slightly darker 

 color. It is known from the original collection only. The 

 smallest specimens of S. diaphanum are many times larger than 



