1918] 



BURT THELEPHORACEAE OF NORTH AMERICA. IX 193 



or wrinkled surface, are scattered throughout the fructifi- 

 cation. 



Fructifications of type 2-6x2-4 mm. — 15 fructifications on 

 an area 4|X2 cm. 



On bark of frondose trees. Jamaica and Cuba. October to 

 January. 



In the original description A. seriatus was regarded as al- 

 lied to A. candidus, but it is much closer to A. nivosus, differ- 

 ing with the latter from A. candidus by convex surface of 

 fructification, by margin not at all free nor reflexed, and 

 by incrusting matter of hyphae not occurring in large crystal- 

 line grains. All the collections which I have referred to A. 

 seriatus have been scanty and bearing few spores ; this species 

 seems distinct from A. nivosus by the absence of clavate or 

 cylindric gloeocystidia and by having the paraphyses spirally 

 twisted and usually distinct from their tips to about the base 

 of the basidia, and by having characteristic globose organs 

 scattered throughout the sections, such as occur in Corticium 

 pallidum Bres. and have been regarded and figured by v. 

 Hohnel & Litschauer as gloeocystidia.^ 



Specimens examined : 

 Jamaica: Cinchona, W. A.d Edna L. Murrill, 565, N. Y. Bot. 

 Gard., Fungi of Jamaica; near Hope Gardens, W. A. Mur- 

 rill, 20, N. Y. Bot. Gard., Fungi of Jamaica; Troy and 

 Tyre, W. A. Murrill & TF. Harris, 1106, N. Y. Bot. Gard., 

 Fungi of Jamaica. 

 Cuba: C. Wright, 283, type (in Curtis Herb.) ; Ceballos, G. J. 

 Humphrey, 2847 (in Mo. Bot. Gard. Herb., 20202). 



8. A. nivosus (Berk. & Curtis) v. Hohn. & Litsch. K. Akad. 

 Wiss. Wien Sitzungsber. 116 : 808. pi. 4. /. 2. 1907. 



Stereum acerinwtn var. nivosum Berk. & Curtis, Grevillea 

 1 : 165. 1873 (lacks description but refers to specimen in 

 Ravenel, Fungi Car. 2 : 37) ; Sacc. Syll. Fung. 6 : 588. 1888. 



Type : type distribution in Ravenel, Fungi Car. 2 : 37, under 

 the name Stereum acerinum. 



Fructifications small, resupinate, adnate, circular or oblong, 

 convex at first, becoming plane, white, the margin thick, de- 



^K. Akad. Wiss. Wien Sitzungsber. 116 : 838. test f. 20. 1907. 



