1926] 



BURT — THELEPHORACEAE OF NORTH AMERICA. XV 203 



18. C. calceum Fries emend. Romell & Burt 



C. calceum Fries, Epicr. 562. 1838, in part; Hym. Eur. 652. 

 1874, in part; Sacc. Syll. Fung. 6: 622. 1888, in part.— T/ie- 

 lephora calcea Fries var. glebulosa Fries, Elench. Fung. 2: 215. 

 1828. — Not Peniophora glebulosa Bresadola, Fungi Trid. 2: 61 

 pi 170, f. 2. 1898. 



Type: in Fries Herb, and a fragment in Burt Herb. 



Fructifications broadly effused, very thin, closely adnate, not 

 at all separable, floccose-membranaceous, white, sometimes be- 

 coming ivory-yellow in the herbarium, even, cracking to the sub- 

 stratum into small rectangular masses 1-4 to a mm., the margin 

 farinose; in section 100-200 [x thick, not colored, with the hyphae 

 erect, densely crowded together and interwoven, somewhat con- 

 glutinate, short-celled, 1-1 H !^ ^^ diameter, sometimes with algal 

 cells imbedded; no gloeocystidia nor cystidia; spores hyaline, 

 even, 3-53^ X 1^-2 [x. 



Fructifications 3-20 cm. long, 1-5 cm. wide. 



Under side of decaying rails of Pinus sylvestris and P. Strohus, 

 and on decaying wood of logs of P. monticola and Thuja. In 

 Sweden and from Vermont and New Jersey to Idaho and British 

 Columbia. July to November. Abundant when found. 



Since C. calceum var. glebulosum is all that now remains under 

 C. calceum after the segregation under other names of all other 

 components, no confusion should result from the present proposed 

 restriction of the species C. calceum. It may be added that the 

 original description of C calceum applies better to the emended 

 species than to any of the other components withdrawn. Bresa- 

 dola studied the Friesian type of Thelephora calcea var. glebulosa 

 and identified it with Peniophora glebulosa, a species very common 

 throughout Europe. He shared a portion of his Friesian type 

 with me and accompanied it with notes on microscopic details in 

 which he stated, ''Cystidia adsunt sed collapsa." However, no 

 cystidia are present in this fragment, nor in the type in Fries 

 Herb., nor in ample collections of the species made by Romell and 

 myself at the type station, Femsjo. I have not been able to 

 recognize this species in the extensive series of Corticiums re- 

 ceived from countries of Europe other than Sweden. Since the 

 species is widely distributed and abundant in northern United 



