VERRUCARIACEAE 



85 



X. Spores globose; thallus scaly or crustose 

 y. Spores ellipsoid; thallus fruticulose 

 (x) Algal filaments parallel with long axis 



of branches 

 (y) Algal filaments perpendicular to long 

 axis 

 m. Paraphyses present 

 n. Paraphyses lacking 



(2) Spores 2-celled 



(a) Paraphyses present 

 X. Algae Xanthocapsa 

 y. Algae Nostoc 



(b) Paraphyses lacking; algae Scytonema or 



Sirosiphon 



(3) Spores x-cellcd; asci 4-spored; paraphyses 



dissolving 



(4) Spores muriform, dark; algae Scytonema 



(5) Spores filiform; periphyses present 

 b. Asci many-spored; spores 1-celled 



(1) Algae Dactylococcus; thallus fine-scaly 



(2) Algae Calothrix; thallus fruticulose 



. Thallus with yellow-green algae, Pleurococcus, 

 Palmella, Trentepohlia, etc. 

 a. Thallus gelatinous or crustose 



(1) Thallus gelatinous, hyphae loose; spores 



2-celled, hyaline 



(2) Thallus crustose, hyphae compact 



(a) Algae Cystococcus, in sheathed colonics 

 X. Thallus without pseudoparenchyma 



y. Thallus with pseudoparenchyma 

 (x) Asci 8-spored 

 m. Spores 2-celled, dark 

 n. Spores x-celled 

 (m) Spores hyaline 

 (n) Spores dark 

 (y) Asci many-spored; spores 1-celled, 

 hyaline 



(b) Algae Pleurococcus or Palmella 

 X. Paraphyses persistent 



(x) Algae present in the perithecium 

 (y) Algae not present in perithecium 

 m. Perithecia with normal ostiole 

 (m) Spores 1-celled 

 r. Spores hyaline 

 s. Spores dark 

 (n) Spores 2-celled, dark 

 (o) Spores x-celled, hyaline 

 (p) Spores muriform, hyaline or sub- 

 hyaline 

 (q) Spores acicular, septate, hyaline 

 n. Ostiole margined by a broad disk; 

 spores hyaline 

 (m) Spores x-celled 

 (n) Spores muriform 



Calotrichopsis 161 



Lichina 163 



Lichenyllium 153 

 Homopsella 163 



Xanthopyrenia 91 

 Pyrenocollema 165; 18 



Eolichen 90 



Pyrenidium 91 ; 18 

 Pyrenothrix 91 

 Hassea 90 



Placothelium 90 

 Lichinella 162 



Epigloea 65; 18 



Subfamily Moriolae 

 Moriola 64 



Dimerisma 64 



Spheconisca 64 

 Phaeomeris 64 



Pleophalis 64 



Subfamily Verrucariae 65 



Thelenidia 68 



Thrombium 68 

 Phaeothrombis 69 

 Thelidiopsis 69 

 Geisleria 69 



Microglaena 69 

 Gongylia 69 



Aspidopyrenis 69 

 Aspidothelium 70; 18 



