1925] 



BURT THE THELEPHORACEAE OF NORTH AMERICA. XIV 339 



brown color within, and abundance of colored cystidia. European 

 authors record it on bark of living Juniperus communis, but the 

 data with the two American specimens which I have seen gave 

 merely the kind of substratum, one of these being Juniperus 

 virginiana. 



Specimens examined : 

 Exsiccati: de Thiimen, Myc. Univ., 2014, authentic specimen 



from Karsten of Xerocarpus Juniperi. 

 Sweden: L. Romell, 104, 105, 106; Femsjo, L. Romell, 407. 

 Finland: Mustiala, P. Karsten, in de Thiimen, Myc. Univ., 2014. 

 Italy (?) : locality not given, G. Bresadola. 

 England: Buckden, Yorkshire, E. M. Wakefield (in Mo. Bot. 



Gard. Herb., 57119). 

 Canada: J. Macoun, 24- 

 New York: Orient, Long Island, R. Latham (in Mo. Bot. Gard. 



Herb., 58907, and Burt Herb.). 



108. P. tephra (B. & C.) Cooke, Grevillea 8: 20. pi 123, f. 6. 

 1879; Sacc. Syll. Fung. 6: 643. 1888; Massee, Linn. Soc. Bot. 

 Jour. 25: 143. 1889. 



Corticium tephrum Berk. & Curtis, Linn. Soc. Bot. Jour. 10: 

 336. 1868. 



Type: in Kew Herb., and in Curtis Herb, mounted on left of 

 card, that on the right is Stereum albobadium. 



Fructifications effused, adnate, between tilleul-buff and drab, 

 becoming drab in the herbarium, somewhat velutinous, the 

 margin thin, adnate, concolorous; in section brown throughout, 

 zonate, 400-550 \l thick, composed of erect, flexuous, thick-walled, 

 somewhat colored hyphae 3-4 \l in diameter, densely crowded 

 together, and of very numerous cystidia; cystidia coarsely in- 

 crusted, conical, sometimes fusiform, 15-25 X 6-9 \l, protruding 

 up to 9-12 [a, not colored, very numerous, throughout the whole 

 fructification; spores hyaline, even, 5 X 2J^-3 \l. 



Fructifications 2-6 cm. long, J^-2 cm. broad. 



On dead wood of frondose species. Mexico, Cuba, Porto Rico, 

 and Bermuda. October to January. 



Former accounts of P. tephra are erroneous because they were 

 partly based on a gathering of resupinate Stereum albobadium. 



