Sumstine: North American Hyphomycetes 
57 
Malbranchea Sacc. Michelia 2 : 638. 1880 
Original description : Hyphae repentes, intricatae, continuae, 
hyalinae, v. laete coloratae, hinc inde in ramulos arcuatos abeuntes ; 
ramuli seriatim plurinucleati, dein ex apice conidia cuboidea v. 
teretiuscula, continua, hyalina v. laete colorata exserentes. 
Mycelium creeping, interwoven, branched, septate or contin- 
uous, hyaline, or bright-colored ; sporophores short, suberect or 
arcuate, simple ; spores in chains, formed endogenously within 
the extremities of the sporophores. 
Type species, Malbranchea pulchella Sacc. 
I. Malbranchea pulveracea (Ellis) 
Monilia pulveracea Ellis; Craigin, Bull. Washburn Coll, i: 69. 
1884. 
Rhinotrichum pulveraceiim Ellis Jour. INIycol. i ; 47. 1885. 
Effused, thin, pale yellow ; mycelium branched, sparingly sep- 
tate ; sporophores short, suberect, simple or branched, with smooth 
swollen ends ; spores in chains, formed within the swollen ends, 
globose or ellipsoid, 5-9 /a or 5-7 X 5-12 /x. 
On dead wood and bark. 
Specimens examined: Kansas, Ellis and Craigin. 
This species is placed in this genus with some hesitation. In 
some respects it agrees better with the genus Glycophila. The 
exact formation of spores could not be learned from the her- 
barium specimen. The original description says that the spores 
appear at first inside the swollen ends and push out through the 
investing membrane. 
Acrosporium Nees. Sys. Pilze 2 : 14. 1817 
Original description : Flocci simplices, aggregati, sursum 
moniliformes, articulis secedentibus inspersi. 
Parasitic ; mycelium scanty or well developed ; sporophores lax, 
erect, simple, septate ; spores produced in chains. 
Type species, Acrosporium monilioides Nees = Monilia hya- 
lina Fr. 
This genus contains the conidial stages of the Erysiphaceae. 
