CALICIACEAE „ 71 



a. Spores clear or merely yellowish 



(1) Algae present but not forming a thallus 



Farriolla 83 



(2) Algae lacking 



(a) Asci long and slender stalked, ovoid above 



Caliciopsis R. 388 



(b) Asci cylindric Roesleria 8:826, R. 396 



b. Spores dark 



(1) Apothecia black, nearly sessile Sphinctrina 83, R. 389 



(2) Apothecia bright-colored, with a slender stalk 



*Eucyphelis R. 392 

 (Cyphelium Rehm) 

 2. Spores typically 2-several-celled 



a. Spores 2-celled 



(1) Apothecia sessile Acolium R. 398 



(2) Apothecia with a slender stalk Mycocalicium R. 401 



b. Spores 3-several-celled Stenocybe 82 R. 413 

 II. Mycelium forming a thallus with algae 



1. Thallus crustose 



a. Spores i-celled, globose or globoid 



(1) Asci 8-spored 



(a) Spores dark; disk more or less flat 



x. Apothecia stalked Chaenotheca 81 



y. Apothecia sessile *Holocyphis 84 



(b) Spores clear or yellowish; disk globose 



Coniocybe 82 



(2) Asci many-spored Tylophorella 85 



b. Spores 2-several-celled, transeptate or muriform 



(1) Spores transeptate 



(a) Spores 2-celled, dark or brown 

 x. Apothecia stalked 



(x) Apothecia long-stalked Calicium 81 



(y) Apothecia with short thick stalk 



Pyrgidium 83 

 y. Apothecia sessile 



(x) Algae Pleurococcus Cyphelium 83 



( y ) Algae Chroolepus 

 m. Proper exciple alone present 



*Dipyrgis 84 

 n. Thalline exciple also present 



*Ditylis 84 



(b) Spores 3-many-celled 



x. Proper exciple alone present Pyrgillus 84 



y. Thalline exciple also present Tylophorum 84 



(2) Spores muriform Pseudacolium 84 



2. Thallus foliose 



a. Thallus of horizontal scales with marginal apothecia 



Calycidium 85 



