Sumstine: North American Hyphomycetes 
49 
3. Oidium Murrilliae sp. nov. 
Efifused, rather thick, powdery, yellow, melleoiis to ochraceous, 
at first white ; mycelium densely interwoven, branching, septate ; 
sporophores erect or suberect, short, septate; spores in short 
chains, sometimes branching, colored, irregularly shaped, ellipsoid 
to lemon-shaped, 12-14 X 20-24/1,. 
On decaying wood. 
Specimens examined: Mexico, near Cuernavaca, W. A. and 
Edna L. Murrill, 446 (type). 
The type is in the herbarium of the New York Botanical 
Garden. 
4. Oidium megalosporum Berk & Curt. Jour. Linn. Soc. i : 363. 
1869 
Monilia megalospora (Berk. & Curt.) Sacc. Syll. Fung. 4: 33. 
1886. Not Oidium megalosporum Speg. Fungi Argentini 4: 
122. 1881. 
Pulvinate, growing in small tufts, sometimes several tufts con- 
fluent, powdery, yellow, pale yellow ; mycelium scanty, branched, 
septate ; sporophores very short ; spores in short chains, globose 
or subglobose, granular within, very large, 35-45 occasionally 
50-70 /i. 
On decayed wood. 
Specimens examined: Delaware, Cummins; Florida, Calkins; 
New Jersey, Cxtrtis; New York, Brozvn, Clinton; Ohio, Morgan; 
Pennsylvania, Sumstine; West Virginia, Sumstine. 
OosPORA Wallr. FI. Crypt. Ger. 2: 182. 1833 
Original description: Sporidia subglobosa s. oriformia intri- 
cata pellucida, primum concatenata, hypham articulatam simpli- 
cem teneram decumbentem mentientia, articulisque inter se facile 
secedentibus fragilia. 
Mycelium scanty, more or less distinct from the sporophores, 
septate ; sporophores thick, erect or decumbent, simple or branched, 
breaking into chains of spores, friable ; spores variously shaped, 
concatenate, hyaline or bright-colored. 
Type species, Torula fructigena Pers. 
