Revisions of Some Plant Phyla 19 



Family 58. Roccellaceae. Frnticose, erect lichens with Trente- 

 pohlia gonidia; apothecia round or elongated, sunken or superfi- 

 cial. Roccella. (Pf. I, i*, 106.) 



Order Pyrenolichenes. Closed Lichens. Lichen- forming 

 fungi allied to the preceding families, mostly crustaceous, less 

 often fohaceous. Perithecia spherical or hemispherical, finally 

 with an apical pore or fissure. 



Family 59. Moriolaceae. Crustaceous lichens with Pleurococ- 

 cus gonidia, which are enclosed in capsular colonies. Moriola. 

 (Pf. I, I*, 52.) 



Family 60. Epigloeaceae. Gelatinous lichens with Palmella 

 gonidia; perithecia spherical, erect. Epigloea. (Pf. I, i*, 53.) 



Family 61. Verrucariaceae. Crustaceous lichens with Pleu- 

 rococcus or Palmella gonidia ; perithecia erect, single. Verrn- 

 caria, Thelidium. (Pf. I, i*, 53.) 



Family 62. Dermatocarpaceae. Foliaceous or somewhat crus- 

 taceous lichens, with Palmella gonidia; perithecia erect, single, 

 with minute ostiole. Dermatocarpon, Endocarpon. (Pf. I, i*, 

 58.) 



Family 62,. Pyrenothamniaceae. Fruticose, branching lichens, 

 with Pleurococcus gonidia ; perithecia erect, single. Pyrenotham- 

 nia. (Pf. I, I*, 61.) 



Family 64. Pyrenulaceae. Crustaceous lichens with Trente- 

 pohlia gonidia ; perithecia erect, single, or clustered. Microthelia, 

 Arthropyrenia, Porinia, Pyrenula. (Pf. I, i*, 62.) 



Family 65. Phyllopyreniaceae. Foliaceous lichens with Tren- 

 tepohlia gonidia; perithecia single, sunken. Lepolichen. (Pf. 

 I, I*, 68.) 



Family 66. Trypetheliaceae. Crustaceous lichens with Tren- 

 tcpohlia gonidia; perithecia clustered, erect, sunken. Trypethe- 

 liiim. (Pf. I, I*, 69.) 



Family 67. Paratheliaceae. Crustaceous lichens with Trente- 

 pohlia gonidia; perithecia single, with narrow, tubular ostiole. 

 Parathclium. (Pf. I, i*, 71.) 



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