TRYBLIDIACEAE— DERMATEACEAE 65 



Subfamily Ostropae 



Rehm i8s 

 Apothecia membranous or leathery, deeply sunken, the scarcely opened tip alone 

 erumpent. 



I. Spores i-celled, elliptic ; asci clavate Laquearia R. 187 



II. Spores many-celled, filiform ; asci cylindric 



1. Apothecia cask-shaped, partly erumpent Ostropa R. 188 



2. Apothecia with only the thick ostiole erumpent 



Robergea R. 189 



Family 32. TRYBLIDIACEAE 



Rehm 191 

 Apothecia sunken, then erumpent, often lobed, brown or black, membranous or 

 horny ; hypothecium well-developed, thick. 



I. Apothecia scattered 



1. Spores i-septate 



a. Spores with a mucose covering *Tryblidis R. 194 



b. Spores without a mucose covering Heterosphaeria R. 198 



2. Spores 2-several-septate 



a. Spores with a mucose covering Tryblidiopsis R. 193 



b. Spores without a mucose covering Odontotrema R. 204 



3. Spores muriform Tryblidium R. 196 



4. Spores filiform *Odontura R. 207 



II. Apothecia cespitose or stromate; spores bacillar or filiform 



Scleroderris R. 208 



Family 33. DERMATEACEAE 



Rehm 241 



Apothecia sunken, then erumpent, cup-shaped to oblong, single or grouped, waxy, 

 leathery or horny, mostly brownish or black ; hypothecium more or less developed. 



Hyalosporae 



8:547, 10:36, 11:422, 14:794, 16:762, 18:121 

 Spores hyaline, i-celled, globose to oblong 



I. Apothecia large, usually stalked or radicate at base 



1. Apothecia ear-shaped, more or less vertical, leathery 



a. Spores ovoid to oblong Midotis 8:547 



b. Spores globose Midotiopsis 18: 121 



2. Apothecia urceolate or turbinate 



a. Apothecia stalked; exciple and hypothecium prosenchymatic 



Urnula 8 : 548 



b. Apothecia stalked ; exciple and hypothecium parenchymatic 



Choriactis 18: 121 



c. Apothecia sessile, hairy; exciple parenchymatic, hypothecium prosenchymatic 



Scytopezis 18: 122 



II, Apothecia small, sessile or nearly so 



