46 



NATURAL HISTORY BULLETIN 



6. ASCOBOLACE^. 



Spores hyaline. 

 Asci 8-spored. 



Receptacle smooth or at least not hairy. , . Ascophanus. 



Receptacle clothed with hairs Lasiobolus. 



Asci 16 to many-spored. 



Plants large, 1 to 2 mm. in diameter, at first 



conical Thecotheus. 



Plants small mostly less than 1 mm. depressed. Rhypakobius. 

 Spores at first hyaline becoming purple. 



Spores free in the ascus Ascobolus. 



Spores united in a ball in the ascus. . . . Saccobolus. 



7. Helotiace.!:. 



Receptacle between fleshy and waxy, or waxy, thick or 

 membranaceous. 

 Receptacle fleshy-waxy, bright colored fragile or 

 dull leathery. 



Plants externally tomentose Sarcoscypha. 



Plants externally smooth. 



Receptacle not springing from a selerotium. 



Substratum green Chloeosplenium. 



Substratum not colored Ciboria. 



Receptacle springing from a selerotium. . Sclerotinia. 

 Receptacle waxy, thick, tough or membranaceous. 

 Externally hairy. 



Plants stipitate Dasyscypha. 



Plants entirely sessile Trichopeziza. 



Externally smooth. 



Spores elliptical to fusiform. 



Plants slender stipitate Phialea. 



Plants with stem short, stout or wanting. . Helotium. 

 Spores linear or much elongated, many-sep- 

 tate GORGONICEPS. 



Receptacle cartilaginous; spores becoming several- 

 celled CORYNE. 



8. MOLLISIACE.E. 



Receptacle fleshy-waxy or rarely membranaceous. . . Mollisia. 

 Receptacle cartilaginous, horny when dry. . . . Orbilia. 



9. Patellariace^. 



Spores with transverse septa only. 

 Plants patellate. 



Spores hyaline 3 to many-septate. . . . Patellaria. 



