Pezizaceae 



41 



Vegetative mycelium immersed in the sub- 

 stratum, not usually restricted to burnt 

 places. 

 Asci 8-spored. 



Apothecia fleshy, very soft. 

 Plants coprophilous. 

 Plants humicolous. 

 Apothecia tough, Ombrophila-like. 

 Asci more than 8-spored. 



Asci bilabiate or opening by a transverse 



slit at the apex. 

 Asci operculate or opening by a circular 

 lid at the apex. 

 Asci and spores small; spores not ex- 

 ceeding 15 fj. long. 

 Asci and spores large; spores 35-38 /x 

 long. 



16. ASC0PH.\NUS. 



17. HUMARINA. 



18. PSEUDOMBROPHILA. 



19. Streptotheca. 



20. Ryparobius. 



21. Thecotheus. 



Tribe 5. Lachneeae. Apothecia rarely exceeding 1 cm. in 

 diameter, scutellate to discoid, sessile, or rarely stipitate, ex- 

 ternally clothed with hyaline or colored hairs; asci operculate, 

 8-spored but often with a part of the spores undeveloped; spores 

 smooth or sculptured, hyaline to pale-yellowish; paraphyses 

 variable. 



Apothecia partially to entirely buried in the ground. 

 Apothecia superficial on the substratum. 



Asci with an external thickened ring near the 

 apex; plants occurring on the dead foliage of 

 cedar. 

 Asci without external thickened ring; plants 

 occurring on soil, wood, humus, or the 

 dung of animals. 

 Apothecia densely clothed with brick-red hairs 

 which give to the whole plant a red appear- 

 ance. 

 Apothecia clothed with hyaline or brown hairs 

 which appear white or black to the 

 naked eye. 

 Hair simple (without cross- walls). 

 Hairs septate, usually erect and bristle- 

 like. 



22. Sepultaria. 



23. Pseudopithyella. 



24. Perrotia. 



25. Lasiobolus. 



26. Patella. 



Tribe 6. Otideeae. Apothecia unsymmetrical, either elon- 

 gated or split on one side to the base, occurring singly or springing 

 in clusters from a sclerotium, rather tough and subcoriaceous, 

 externally smooth, pruinose, or occasionally tomentose; asci 

 cylindric, operculate, 8-spored; spores smooth but often marked 



4 



