1917] 



BURT THELEPHORACEAE OF NORTH AMERICA. VIII 



261 



Louisiana: St. Martinville, A. B. Langlois, 2639 in part. 



16. C. flava Burt, n. sp. 



Type : in Burt Herb, and N. Y. Bot. Gard. Herb. 



Fructification effused, soft, membranaceous, separable from 

 the substratum, drying primuline-yellow throughout, with the 

 margin a little paler ; hymenium even, cracked, somewhat pul- 

 verulent; in structure 400 ju thick (1) with the 

 hyphae loosely interwoven next to the sub- 

 stratum, 3-4V2 Ai in diameter, occasionally 

 nodose-septate, frequently more or less in- 

 crusted, and (2) with the hyphae more densely 

 arranged in the subhymenium, more regularly 

 incrusted, and containing many heavily in- 

 crusted, cylindric cystidia 8-9 n in diameter, 

 which do not protrude beyond the surface of the 

 hymenium; hymenial cystidia usually not in- 

 crusted, 5-7 n in diameter, emerging up to 30 /x, 

 occasionally with a few incrusting granules near 

 the base ; spores concolorous with the hyphae and 

 the fructification, borne 4 to a basidium, even, 

 flattened or slightly curved on one side, 4x2 /x. 



The portion of a fructification which I have 

 seen is 11/2 X 1 cm. 



Substratum not noted. Jamaica. January. 



Although I have seen but a small portion of a fructification, 

 which does not afford data as to margin or substratum, this 

 portion shows a species which should be readily recognized 

 by its bright yellow color throughout, peeling away from the 

 substratum in a compact sheet, small spores flattened on one 

 side, and by heavily incrusted, wholly buried cystidia. 



Specimens examined: 

 Jamaica: Troy and Tyre, Cockpit Country, 2000 ft. altitude, 

 W. A. Murrill S W. Harris, N. Y. Bot. Gard., Fungi of 

 Jamaica, 1089. 



17. C. laeticolor Karsten, Finl. Basidsv. 436. 1889 ; Massee, 

 Linn. Soc. Bot. Jour. 25 : 137. 1889. 



Fig. 16 

 C. flava. 

 P r o t r u d - 

 ed part of 

 cystidium, c; 

 i n c r u st - 

 ed cystidium 

 from interior 

 of fructifica- 

 t i o n , d; 

 spores, s. 

 X 665. 



