26 Charles E. Bcssey 



Family 50. Ascobolaceae. Apothecia fleshy, at first spherical 

 and closed, later open, concave ; asci opening by a lid, when ripe 

 escaping from the apothecium. Ascobolus. (Pf. I, i, 188.) 



Family 51. Helotiaceae. Apothecia fleshy, mostly open from 

 the first, usually stalked ; asci not opening by a lid. Sarcoscypha, 

 Sclerotinia, Dasyscypha, Hclotinm. (Pf. I, i, 193.) 



Family 52. Mollisiaceae. Apothecia fleshy, open from the first, 

 sessile, asci not opening by a lid. Mollisia, Pyrenopcsisa. Pf. 

 I, I, 210.) 



Family 53. Celidiaceae. Apothecia leathery, dusky or light 

 colored, roundish, without a peridium. Lccidiopsis, Celidktm. 

 (Pf. I, I, 218.) Some of the species are very closely related to 

 such liohen-forming fungi as Arthonia. 



Family 54. Patellariaceae. Apothecia leathery or corneous, 

 free from the first, usually dark colored, hemispherical or elon- 

 gated, cup-shaped or plate-shaped, with a peridium. Paicllaria, 

 Biatorella. (Pf. I, i, 221.) 



Family 55. Cenang'iaceae. Apothecia leathery or carbonace- 

 ous, at first sunken, usually dark colored, at first round and closed, 

 later open, cup-shaped with a peridium. Cenanginm, Dermatea, 

 Bulgaria. (Pf. I, i, 231.) 



Family 56. Cordieritidaceae, Apothecia on the ends of a 

 branched, carbonaceous, brittle stroma; saprophytes. Cordicritcs. 

 (Pf. I, I, 241.) 



Family 57. Cyttariaceae. Apothecia sunken in the surface of 

 a bulbous, stalked, hard stroma, which eventually is gelatinous ; 

 parasites. Cyttaria. (Pf. I, i, 241.) 



Order Dtscolichenes. Lichen-forming fungi, allied to the 

 preceding families, with which they may eventually be merged. 

 Apothecia circular, typically cup-shaped or plate-shaped. 



Family 58. Lecanactidaceae. Criistaceous lichens with Chroo- 

 lepus gonidia; apothecia sessile or sunken. Lecanactis. (Pf. I, 

 I*, 114.) 



Family ' 59. Pilocarpaceae. Crustaceous lichens with Proto- 

 coccus gonidia; apothecia at first sunken, later emergent. Pilo- 

 carpon. (Pf. I, i*, 116.) 



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