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. Оп 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. 
Тһе 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. 
Microstroma Niessl, Mahr. Crypt. Fl, 163. 1861; Saec. 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, ete. 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. Jubilé 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; басе. Syll. Fung. 21: 421. 1912; Wolf, Elisha Mitchell 
Scientif. Soc. Jour. 36: 82. 1920. 
Тһе 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 
