1924] 



BURT THE THELEPHORACEAE OF NORTH AMERICA. XIII 27 



Hyalostilbeae but having spores borne one or two to a sporophore 

 usually but one. This fungus appeared in cultures of the bark of 

 Piscidia erythrina, used in pharmacy and obtained from South 

 America northward to Florida. On account of sometimes two 

 spores to a spore-bearing cell Boulanger would class Matruchotia 

 as a Basidiomycete as an intermediate connecting the Basi- 

 diomycetes with the Hyphomycetes and showing their phylo- 

 genetic origin from the latter. 



The account and illustrations present Matruchotia as having 

 an erect trunk composed of cohering hyphae, branched above, 

 and bearing spores along the sides of the trunk and branches 

 and at the tips of the final branchlets. 



I am disposed to regard Matruchotia as a genus of the Stilbiaceae 

 and do not attach great importance to the fact that the spores 

 are sometimes in twos. 



The range of Matruchotia is northward to Maine at least and 

 on other kinds of wood than Piscidia, for while collecting at Kit- 

 tery Point with Professor Thaxter we found plentifully there a 

 soft, white, mucedinous fungus which he recognized as Matrucho- 

 tia. 



Microstoma Niessl, Mahr. Crypt. Fl., 163. 1861; Sacc. Syll. 

 Fung. 4: 9. 1886; Engl. & Prantl, Nat. Pflanzenfam. (1:1**): 

 105. 1898. 



This genus is represented in North America by M. albus, M. 

 Juglandis, M. leucosporum, M. americanorum, and M. ingainicola. 

 The more frequent species occur as small white patches on living 

 leaves of Carya, Juglans, Quercus, etc. Some authors have re- 

 ferred Microstroma to the Basidiomycetes on account of several 

 spores being produced at the apex of the spore-bearing cell. R. 

 Maire, Rec. publ. Occ. Jubile* sc. Prof. Le Monnier 131-139. 

 1913, concludes that Microstroma is not a Basidiomycete but 

 one of the Melanconieae. 



Protocoronospora Atkinson & Edgerton, Jour. Myc. 13: 186. 

 1907; Sacc. Syll. Fung. 21: 421. 1912; Wolf, Elisha Mitchell 

 Scientif. Soc. Jour. 36: 82. 1920. 



The type species, Protocoronospora nigricans Atk. & Edg., is 

 a virulent parasite on all parts above ground, including the pods, 

 of Vicia sativa and V. villosa. Protocoronospora was proposed as 



