THE LICHEN FLORA OF THE SANTA CRUZ PENINSULA 177 



8. LECANORA COILOCARPA (Ach.) Nyl. 



Lecanora subfusca /? coilocarpa Ach. Lich. Univ. 393. 1810. 

 Lecanora coilocarpa Nyl. with Norrl. in Medd. Salsk. pro Faun, et 



Flor. Fenn. 1: 23. 1876. 

 Lecanora subfusca d. coilocarpa Tuck. Syn. N. Am. Lich. I: 188. 



1882. 



Thallus determinate or effuse, at first rather thin, uneven, granu- 

 late, wrinkled, becoming thickish, fissured, and verrucose; color gray 

 to white; KOH yellow; CaCl 2 O 2 -. 



Apothecia usually small and very numerous, sometimes conceal- 

 ing the thallus, finally of medium size; from concave and plane even- 

 tually convex and flexuous; disk black; margin entire to crenate, 

 rarely lobate; paraphyses slender, hardly free or else coherent, the 

 epithecium dark greenish in section; hymenium blue with I; spores 



5-6 

 -2- //. 



14 - 18 



Abundant on rocks; closely resembling Lecanora atra and Leca- 

 nora frustulosa in some of their forms, but readily separated on 

 examination of sections of the apothecia. 



A rock lichen of Europe and North America. 



* (*.)zi 

 9. LECANORA SORDIDA (Pers.) Th. Fr. 



Lichen sordida Persoon in Ust. Ann. Bot. 7: 26. 1794. 

 Lecanora sordida Th. Fr. Lich. Scand. 1 : 246. 1871. 

 Lecanora sordida Tuck. Syn. N. Am. Lich. I: 187. 1882. 



Thallus determinate, medium to large, orbiculate or effuse, and 

 spreading extensively, the circumference often zonate; fissured, or 

 chinky and areolate, rough, the surface crumbly; whitish, glaucous 

 white, or brownish white; KOH bright yellow; CaCl 2 2 . 



Apothecia numerous, often crowded, of small to medium size, at 

 first innate, plane, soon sessile and convex or globose; circular to 

 angular and difform; disk usually black, also pale clouded-flesh- 

 color, and dusky; densely pruinose, the apothecia appearing dull 

 gray to bluish gray or whitish; yellow with CaCl 2 O 2 ; margin thin, 

 entire, finally disappearing; thecium blue with I; spores 

 4-9 ~ 8.5 

 9-5 - 17-5 



