[Vol. 7 

 208 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



On dead limbs of a frondose species. Jamaica. December 

 to January. 



S. magnisporum may be recognized by its small, whitish 

 fructifications, with narrowly refiexed or free margin, pale hy- 

 menium distinctly setulose with the large cystidia, and by the 

 very large spores. The large spores and basidia show relation 

 of S. magnisporum to Aleurodiscus, but the absence of granular 

 matter or of any unusual character of the paraphyses leads to 

 the belief that this species will usually be sought for among the 

 Stereums. 



Specimens examined: 

 Jamaica: Chester Vale, W. A. & E. L. Murrill, 328, type, comm. 

 by N. Y. Bot. Gard. Herb.; Cinchona, W. A. & E. L. 

 Murrill, 522, comm. by N. Y. Bot. Gard. Herb. 



66. S. spumeum Burt, n. sp. Plate 6, fig. 66. 



Corticium spumeum Berk. & Rav. in Curtis Herb, (in part); 

 Grevillea2o: 13. 1891 (in part — nomen). — C. ochroleucum, ''as 

 resupinate ambient condition," Berk. & Curtis, Grevillea i: 

 166. 1873, but not Stereum ochroleucum Fries. — Not Corticium 

 ochroleucum var. erimosum Berk. & Curtis, Grevillea i: 166. 

 1873. 



Type: in Burt Herb. 



Fructifications spongy-soft, effused, resupinate, separable, 

 sometimes narrowly refiexed, the upper surface tomentose and 

 becoming cartridge-buff to pinkish buff in the herbarium, the 

 margin entire; in structure 400-1500 m thick, composed of 

 loosely interwoven, hyaline, thick-walled hyphae 3-4^ m in di- 

 ameter, sometimes nodose-septate, the intermediate layer not 

 bordered on its upper side by a crust-like or colored zone; 

 hymenium even, cream-buff to pinkish buff; no conducting 

 organs; cystidia incrusted, 36-60X9-12 m, sometimes protrud- 

 ing up to 40 M ; spores hyaline, even, 5-9 X 3-4 m. 



Resupinate over areas 1-10 X 1-5 cm., refiexed portion 1-4 

 mm. broad when present. 



On bark and wood of dead beech, oak, and other frondose 

 limbs. New York to Mexico. August to Januarj^ Rare. 



S. spumeum is noteworthy by its narrowly refiexed pileus, 

 spongy-soft throughout, and without differentiation of its sur- 



