Revisions of Some Plant Phyla 1 3 



pohlia gonidia; apothecia sessile or sunken. Lccanactis. (Pf. I, 

 I*, 114.) 



Family 3. Pilocarpaceae. Crustaceons lichens with Proto- 

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

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



Family 4. Chrysothricaceae. Spongy lichens with Palmella 

 gonidia; apothecia sunken, disk-form, with a margin. Chrysoth- 

 ri.v. (Pf. I, I*, 117.) I 



Family 5. Thelotremataceae. Crustaceous lichens with Tren- 

 tepohlia gonidia ; apothecia sunken, surrounded by a thalline 

 margin. Orcellnlaria, Thelotrema. (Pf. I, i*, 118.) 



Family 6. Diploschistaceae. Crustaceous, stratified lichens 

 with Protococcus gonidia ; apothecia sunken or erumpent, mar- 

 gined. Diploschistes. (Pf. I, i*, 121.) 



Family 7. Ectolechiaceae. Crustaceous lichens with Proto- 

 coccus gonidia; apothecia sunken to sessile, small, not margined. 

 Sporopodium. (Pf. I, i*, 122.) Growing on leaves. 



Family 8. Gyalectaceae. Crustaceous lichens with Trente- 

 pohlia, Phyllactidiiim, or rarely Scytonema gonidia ; apothecia sim- 

 ple, sunken to sessile, margin weak, bright-colored to carbonace- 

 ous. Gyalecta. (Pf. I, i*, 124.) 



Family 9. Coenogoniaceae. Spongy lichens with Trentepohlia 

 or Cladophora gonidia; apothecia margined, sessile or short- 

 stalked. Coenogonium. (Pf. I, i*, 127.) 



Family 10. Lecidiaceae. Crustaceous lichens with Gloeocapsa- 

 like, or Protococcus gonidia; apothecia sessile, less commonly 

 sunken, or short-stalked. Lecidia, Bacidia, Toninia. (Pf. I, i*, 

 129.) 



Family 11. Phyllopsoraceae. Scaly to foliose lichens with 

 Pleurococcus gonidia ; apothecia sessile, with a bright-colored or 

 dark margin. PhyUopsora. (Pf. I, !"'■', 138.) 



Family 12. Cladoniaceae. Crustaceous to scaly to foliose li- 

 chens with Pleurococcus gonidia (rarely with Cyanophyceae go- 



49 



