A Synopsis of Plant Phyla 27 



Family 60. Chrysothricaceae. Spongy lichens with Palmella 

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

 rix. (Pf. I, r% 117.) 



Family 61. Thelotremataceae. Crustaceous lichens with 

 Chroolepus gonidia; apothecia sunken, surrounded by a thalline 

 margin. Orcellularia, Thelotrcma. (Pf. 1, i*, 118.) 



Family 62. Diploschistaceae. Crustaceous, stratified lichens 

 with Protococcus gonidia; apothecia sunken or erumpent, mar- 

 gined. Diploschistes. (Pf. I, r'% 121.) 



Family 63. Ectolechiaceae. Crustaceous lichens with.Pro^o- 

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

 Sporopodinm. (Pf. I, i'^, 122.) Crrowing on leaves. 



Family 64. Gyalectaceae. Crustaceous lichens with Chroo- 

 lepus, Phyllactidinm, or rarely Scytonema gonidia ; apothecia sim- 

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

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



Family 65. Coenogoniaceae. Spongy lichens with Chroolepus 

 or Cladophora gonidia ; apothecia margined, sessile or short- 

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



Family 66. Lecidiaceae. Crustaceous lichens with Glococapsa- 

 like, or Protococciis gonidia; apothecia sessile, less commonly 

 sunken, or short-stalked. Lccidia, Bacidin, Toninia. (Pf. I, i*, 

 129.) 



Family 67. Phyllopsoraceae. Scaly to foliose lichens with 

 Pleurococcus gonidia; apothecia sessile, with a bright colored or 

 dark margin. Phyllo psora. (Pf. I, i*, 138.) 



Family 68. Cladoniaceae. Crustaceous to scaly to foliose li- 

 chens with Pleurococcus gonidia (rarely with Cyanophyceac gon- 

 idia) ; apothecia mostly convex, terminal or lateral on vertical 

 stalks (podetia). Beomyces, Cladonia, Stereocau.lon. (Pf. I, i'^, 



I39-) 



Family 69. Gyrophoraceae. Foliose, coriaceous lichens at- 

 tached at a single point, with Pleurococcus gonidia ; apothecia 

 flat, sessile or stalked, margined. Gyrophora, Umbilicaria. (Pf. 

 I, I*, 147.) 



Family 70. Acarosporaceae. Crustaceous, scaly to foliose 

 lichens with Pleurococcus or Protococcus gonidia ; the thallus 



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