[Voi,. 7 

 236 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



The American Stereum spumeum has aspect and structure very- 

 similar to Stereum ochroleucum Fr. but differs by having incrusted 

 cystidia. 



Stereum unicum Lloyd, Myc. Writ. 4. Stip. Stereums, 35. 

 text f. 556. 1913. 



The type is in New York State Museum under the name 

 Thelephora speciosa unless relabeled to conform to the name 

 applied by Lloyd. The type bears no basidia yet and is not 

 determinable as to genus; it was collected in Providence, 

 Saratoga County, New York, where I have been looking for a 

 fertile specimen when in the original locality occasionally in the 

 summer. 



EXCLUDED SPECIES 



Stereum acerinum (Pers.) Fr. is Aleurodiscus acerinus (Pers.) 

 v. Hohn. & Litsch. 



Stereum acerinum var. nivosum Berk. & Curtis is Aleuro- 

 discus nivosus (B. & C.) v. Hohn. & Litsch. 



Stereum calyculus Berk. & Curtis is Craterellus calyculus 

 (B. & C.) Burt. 



Stereum candidum Schweinitz is Aleurodiscus candidus 

 (Schw.) Burt. 



Stereum carolinense Cooke & Ravenel is Sparassis spathu- 

 latus (Schw.) Fr. 



Stereum duriusculum, as determined by Patouillard in Duss, 

 Fl. Antilles Fr. 232. 1903, is probably Hypochnus pallescens 

 (Schw.) Burt, a species common in the West Indies. 



Stereum Guadelupense Patouillard, Soc. Myc. Fr. Bui. 15: 

 201. pi. 10. f. 1. 1899. According to von Hohnel & Lit- 

 schauer, K. Akad. Wiss. Wien Sitzungsber. 116: 753. 1907, 

 this is a Boletus overrun by a Sepedonium. 



Stereum Haydeni Berkeley in Massee, Linn. Soc. Bot. Jour. 

 27: 199. 1890. 



The type, in Kew Herbarium, was collected in Ohio; it is 

 strictly resupinate, has its hyphae loosely interwoven from 

 hymenium to substratum, and has no characters which justify 

 its inclusion in Stereum as comprehended in my work. The 



