5 (4) Appendages long, slender, attenuate, may be inflated at tips Hali^ena (p. 29) 



•■•-•- »V'^^?i»;<. 



5 (4) Appendages short, blunt, at one or both ends . . . (see Xy'v- r // '■■'>:<^-;. 

 alsoDidymosporae) •. . Lentescospora submarina .. ., 



V)^^i!i:,Tl■■■^ 



6 (1) Spores 2- to 4-celIed 7 



6 (1) Spores 4- to 8-celled 9 



7 (6) Ascospores provided with an amorphous, gelatinous sheath gener- 

 ally surrounding the midportion of, and usually as thick as, the 

 spore Carbosphaerella leptosphaerioides 



7 (6) Ascospores either without a sheath, or if one is present, not amorphous, but thin and surround- 

 ing the entire spore 8 



8 (7) All cells hyaline and more or less equal in size Sphaerulina (p. 31) 



8(7) All or some cells yellow to yellow-brown, or brown to dark brown; if all hyaline, penultimate 



cell largest Leptosphaeria (p. 29) 



9 (6) Ascospores hyaline, end cells attenuate and curved Sphaerulina {p. 'M) 



9 (6) Ascospores hyaline or yellow-brown, end cells not attenuate and curved Leptosphaeria (p. 29) 



28 



