LABOULBENIACEAE 19 



y. On short opposite branchlets of the appendage 



Stichomyces T. 4: 37 

 (b) Antherids terminal 

 x. Antherid with a short spine at the tip 



Haplomyces T. 269, L. 497 

 y. Antherid without a spine but with a neck-like canal cell 

 (x) Ascogenic cells at least 36 Polyascomyces T. 2: 414 

 (y) Ascogenic cells few 

 m. Stalk of antherid a single cell 



(m) Antheridial cells obliquely in vertical rows 

 r. Subbasal cell of receptacle with a sterile appendage 



Eumonoecomyces T. 4: 21 

 s. Subbasal cell of receptacle without sterile appendage 



Eucantharomyces T. 273, L. 497 

 (n) Antherid parenchyma-like, many-celled 

 r. Antheridial cells with three marginal cells 



Euhaplomyces T. 4: 25 

 s. Antherial cells without marginal cells 



Camptomyces T. 274, L. 498 

 (o) Antherid of several superposed cells bearing single simple an- 

 therids directly 

 r. Simple antherids two Acallomyces T. 5: 23 



s. Simple antherids several 



Acompsomyces T. 4: 37 

 n. Stalk of two cells placed side by side 



Monoecomyces T. 2: 412, 4: 23 

 (2) Antherids arising on the receptacle 



(a) Perithecia free 



x. Receptacle of a single row of several to many superposed cells 



Enarthromyces T. 276, L. 498 

 y. Receptacle of one or two superposed cells followed by two or three 

 oblique or transverse rows 

 (x) Receptacle with one basal cell 



m. Basal cell followed by two tiers of cells 



Limnaeomyces T. 2: 428 

 n. Basal cell followed by three symmetrical series 



Dichomyces T. 282, L. 499 

 (y) Receptacle with two superposed basal cells 



Peyritschiella T. 278, L. 499 



(b) Perithecia grown together with distal portion of receptacle 

 x. Base of receptacle of two superposed cells 



Chitonomyces T. 285, L. 499 

 y. Base of three superposed cells Hydraeomyces T. 293, L. 500 



2. Antheridial cells distinct, discharging Independently 



a. Dioecious 



(1) Perithecium borne by the basal or subbasal cell of receptacle 

 (a) Perithecium on the single basal cell, spores continuous 



Amorphomyces T. 295, L. 501 



