1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 311 



Colorado: Arapahoe region, B. M. Duggar (in Mo. Bot. Gard. 



Herb., 63771); Tolland, L. 0. Overholts, 1801 (in Mo. Bot. 



Gard. Herb., 43785, 54873), and E. Bethel (in N. Y. Bot. Gard. 



Herb., and Mo. Bot. Gard. Herb., 61447). 

 Idaho: St. Joe National Forest, J. R. Weir (in Mo. Bot. Gard. 



Herb., 43759, 63761); Victor, E. B. Payson, 2353, 2362 (in 



Mo. Bot. Gard. Herb., 57358, 57362). 

 British Columbia: Sidney, J. Macoun, 83 (in Mo. Bot. Gard. 



Herb., 55354). 

 Washington: Mt. Paddo, W. N. Suksdorf, 732, type. 

 Oregon: Austin, J. R. Weir, 5242 (in Mo. Bot. Gard. Herb., 



55944). 

 California: Mt. Shasta, E. B. Copeland, in Baker, Pacific Slope 



Fungi, 3570; Santa Barbara, W. H. Morse, comm. by C. J. 



Humphrey, 860 (in Mo. Bot. Gard. Herb., 19314). 

 Arizona: Mt. Humphrey, near Flagstaff, W. H. Long, 21323 (in 



Mo. Bot. Gard. Herb., 55130); Peak Agassiz, near Flagstaff, 



W. H. Long, 19489 (in Mo. Bot. Gard. Herb., 44737, 55129). 



C. flavomarginata Burt, n. sp. 



Type: in Burt Herb. 



Fructifications effused, thick, membranaceous, separable, when 

 growing avellaneous, with the margin flavous, fading in the 

 herbarium to pinkish buff with margin whitish, even or somewhat 

 colliculose, velvety, the margin radiate-fimbriate; in section 

 500 y. thick, chamois-colored, becoming stratose, the hyphae 

 suberect, densely arranged and interwoven, slightly colored, thin- 

 walled, collapsing, 3-3J/ y. in diameter, not incrusted, not nodose- 

 septate; no cystidia nor gloeocystidia; spores slightly colored, 

 even, cylindric, 12-15 X 43^-6 \l. 



Fructifications 1-3 cm. long, J^-3 cm. wide. 



In crevices of the rough bark of large branches of Quercus 

 Garryana. Washington. December and March. 



The faded herbarium specimens of C. flavomarginata have 

 aspect similar to those of C. polyporoidea but very different tissues 

 and spores. The yellow margin of the thick, tan-colored fructi- 

 fications composed of 3 strata, should make this species conspicu- 

 ous in its region, and it is rather surprising that it has not been 

 received except from Mr. Suksdorf. 



