13 (/2) Perithecia elevated, often shiny, dome-shaped to hemispherical or sometimes pointed (Fig. 26) 14 



Figure 26.— Thallus with ele\ated perithecia. 

 Scale is I mm. 



13 (12) Penthecia submerged to slightly elevated (Fig. 27); spores 8-1 1 



4-5 ^m; thallus thick, green to greenish-black 

 Vcniiccirla mucosa 



Figure 27. — Thallus with submerged to 

 slightly ele\ated perithecia. Scale is I mm. 



14 ( /.^) Spores 6-1 1 x 3-5;im . 

 14 (7i) Spores 18-22 -x 8-9/mi. 



. Venucaria micrcyspora 

 . . . Vernicana silicictla 



15 {12) Areoles light brown on dark brown prothallus (Fig. 28); penthecia brown; spores thick walled (11.5) 15-23 



(27) X (4) 6-8( 14)/im Vernicana inicniign-scens 



Figure 28.— a. Vertical section of 

 perilhccium. Scale is 0.1 mm. h. 

 Thallus of Xi'micaria inlernigres- 

 ceiis. Scale is 1 mm. 



15 {12) Prothallus not evident; thallus prommently fissured; penthecia brown or black; spores thin-walled. 9-12 x 5-6f(ni 



(Fig. 29) Venucaria ceutlmcarpa 



I H 



ro^i 



Figure 2*). — a. Wrtiial section 

 of perithelium. Stale is O.l 

 mm. h. Thallus of Verrucaria 

 ceuthocarpa. Scale is 0. 1 mm. 



10 



