150 26. PYRENOPSIDACEAE [98. Peccania 



2. Thyrea Girardi (Dur. & Mont.) Bagl. & Carr., Atti Soc. Critt. Ital. 2:349. 



1881. 



Collema Girardi Dur. & Mont., in Dur., Fl. Alger. Crypt. 1:199. pi. 18, f . 4. 

 1846. Omphalaria Girardi (Dur. & Mont.) Nyl. 



Transforming the algal colony into a small, tough, ascending to erect, widely 

 lobed, marginally wavy to divided, ashy to blackening body; apothecia minute, 

 0.05-0.15 mm. across, immersed, the disk black, deeply urceolate, -nearly closed to 

 more or less open; hypothecium thin, hyaline to brownish; spores 8, short-ellip- 

 soid, 9-12 X 6-8 /x. 



On trees, Alabama. In the specimens examined the algal host seen was 

 Gloeocapsa. 



3. Thyrea Demangeonii (Mont. & Moug.) Fink n. comb. 



Collema Demangeonii Mont. & Moug., Ann. Sci. Nat. Bot. III. 12:291. 1849. 

 Omphalaria phyllisca (Wahl.) Tuck. Phylliscum Demangeonii (Mont. & 

 Moug.) Nyl. 



Transforming the algal colony into a small, rigid, flat to slightly raised, irreg- 

 ularly cut-lobed, somewhat imbricated, black body; apothecia minute to small, 

 0.2-0.5 mm. across, immersed to slightly raised as warts, the disk punctiform, 

 black, the algoid exciple moderately thick, colored like the thallus; spores 8-16, 

 oblong-ellipsoid, 6-10 X 4-5 (x. 



On rocks, New England, Minnesota, and Oregon. In the specimens examined 

 the algal host seen was Trentepohlia. 



4. Thyrea pyrenoides (Nyl.) Fink n. comb. 



Omphalaria pyrenoides Nyl., Syn. Meth. Lich. 1:100, 101. 1858. 



Transforming the algal colony into a small, deeply lobed, marginally round 

 and wavy black body, with lobes closely packed and ascending to erect; apothecia 

 minute, 0.08-0.15 mm. across, immersed, the disk urceolate to finally dilated, 

 black, the algoid exciple swollen, colored like the thallus; spores 8, spherical to 

 ellipsoid, 8-12 X 6-9 /*. 



On rocks, Minnesota, Texas, and New Mexico. 



98. Peccania Mass., Atti 1st. Veneto III. 5:335. 1860. 



Transforming the algal colony into a small, more or less branched, erect, fruti- 

 cose body, devoid of differentiation into layers, attached to the substratum by 

 rhizoids; apothecia small to middle-sized, subterminal, immersed to adnate, the 

 disk closed to open, concave to convex, the exciple thick, colored like the thallus; 

 hypothecium hyaline to brownish; hymenium hyaline; paraphyses firm, un- 

 branched; asci clavate; spores 8 or more, hyaline, oblong to ellipsoid or almost 

 spherical, non-septate. 



The algal host is Xanthocapsa. 



1. Peccania kansana (Tuck.) Forss., Nov. Act. Reg. Soc. Sci. Upsal. III. 13:90. 



1885. 

 Omphalaria kansana Tuck., Proc. Am. Acad. 12:170. 1877. Pleoconis kansana 



(Tuck.) Clements. 

 Transforming the algal colony into a small, rigid, black, fruticose body, com- 

 posed of stipitate, erect, clavate, lobate divisions; apothecia small to middle-sized, 

 0.4-0.8 mm. across, subterminal, slightly immersed to adnate, the disk becoming 

 convex, black, the algoid exciple thin, black, soon disappearing; spores 8-16, 

 oblong to ellipsoid, 5-9 X 3-4 /x. 



On rocks and soil, Minnesota, Kansas, and New Mexico. 



