26 



GENERA OF FUNGI 



(b) Scutellum radiate only at margin or not 

 at all 

 c. Asci borne in apothecia 



(1) Apothecia not parasitic on algae, thallus 

 lacking 



(a) Apothecia sunken, then erumpent, usu- 



ally opening by lobes, sometimes by a 

 cleft 

 X. Apothecia dark to black 

 (x) Hypothecium thin 

 (y) Hypothecium thick 

 y. Apothecia light-colored, mostly white 



(b) Apothecia typically superficial, opening 



circularly, sometimes erumpent, as in 

 the first family 

 X. Apothecia typically innate-erumpent, 



leathery or horny, brown or black 

 y. Apothecia typically superficial 

 (x) Asci disappearing early; spores and 

 paraphyses forming a mazaedium 

 (y) Asci persistent; mazaedium lacking 

 m. Apothecia gelatinous 

 n. Apothecia not gelatinous 

 (m) Apothecia usually dark, carbonous 



to leathery, rarely waxy 

 (n) Apothecia usually bright-colored, 

 waxy to fleshy 

 r. Apothecia typically waxy, on 

 plants 

 (r) Exciple dark, parenchymic all 

 over or at the base; mostly 

 sessile 

 (s) Exciple concolorous, rarely 

 dark, prosenchymic; mostly 

 stalked 

 s. Apothecia typically fleshy, usu- 

 ally terricole, sometimes fimi- 

 cole 

 (r) Apothecia closed at first, then 

 open, cupulate to discoid, 

 rarely ear-shaped 

 h. Apothecia usually terricole, 

 medium to large; asci 

 mostly cylindric, not ex- 

 serted 

 i. Apothecia usually fimicole, 

 small; asci broad, exserted 

 from disk at maturity 

 (s) Apothecia open from the first, 

 stalked, saddle-shaped to 

 pileate or clavate, terricole 

 as a rule 

 (2) Apothecia parasitic on algae, thallus typi- 

 cally well-developed 



Micropeltaceae p. 100 



Phacidiales p. 102 



Phacidiaceae p. 107 

 Tryblidiaceae p. Ill 

 Stictidaceae p. 109 



Pezizales p. 112 

 Dermateaceae p. 114 



Caliciaceae p. 119 

 Bulgariaceae p. 115 



Patellariaceae p. 117 



Mollisiaceae p. 133 



Helotiaceae p. 134 



Pezizaceae p. 137 

 Ascobolaceae p. 140 



Helvellaceae p. 139 



