125. Bilimbia] 33. LECIDEACEAE 221 



OTHER SPECIES REPORTED 



Catillaria subnigrata (Nyl.) Blombg. et Forss. — California. 

 Catillaria superfiua (Mull. Arg.) Zahlbr. — New England. 



124. Megalospora Meyer, Nov. Act. Acad. Caes. Leop. Car. 



Suppl. 19:228. 1843. 



Thallus crustose, rough and warty, rudimentary, devoid of differentiation into 

 layers and attached to the substratum by hyphal rhizoids; apothecia middle-sized 

 or large, adnate or almost sessile, the disk more or less convex, usually black, 

 the exciple light-colored to black, usually disappearing; hypothecium hyaline to 

 brownish or brown; hymenium hyaline; paraphyses unbranched or branched and 

 netlike interwoven; asci clavate; spores 1-8, hyaline, large, 1 -septate. 



The algal host is Protococcus. 



1. Megalospora versicolor (Fee) Zahlbr., in E. & P., Nat. Pfl. 1:134. 1907. 



Lecanora versicolor Fee, Essai Crypt. 115. pi. 28, f . 4. 1824. Heterothecium 

 versicolor (Fee) Flot. M. sulphurata var. genuina Riddle. 



Thallus thin to moderately thick, smooth to chinky-areolate and wrinkled, 

 greenish gray to ashy, rarely disappearing; apothecia middle-sized to large, 1-3 

 mm. across, sessile, the disk flat to convex, brownish black to black, the exciple 

 thin, light-colored to black, finally disappearing; hypothecium brownish to black- 

 ish brown; paraphyses slender, flexuous, becoming enlarged at the apices; asci 

 long-clavate; spores 2-4 or rarely 8, ellipsoid, slightly curved, 45-65 X 18-30 /x. 



On trees, Florida. 



125. Bilimbia De Not., Giorn. Bot. Ital. 2 1 :190, 191. 1846. 



Thallus crustose, smooth to warty or minutely granulose or rarely squamulose, 

 rudimentary and rarely differentiated into layers; apothecia minute to small, rarely 

 somewhat immersed to adnate or sessile, scattered or clustered, round to irregular, 

 the disk flat to convex, flesh-colored or yellow to red, brown or black, the proper 

 exciple usually disappearing; hypothecium hyaline to brownish black; hymenium 

 hyaline; paraphyses unbranched; asci clavate; spores 8 or rarely more, hyaline, 

 oblong-ellipsoid to fusiform, 3-7-septate, rarely only 1 -septate. 



The algal host is Protococcus. 



A. On rocks and soil 



B. Hypothecium hyaline to yellowish 

 C. Spores 3-septate 



D. Apothecia pale to yellowish or reddish 4. B. cupreorosella 



D. Apothecia reddish to brownish black 8. B. gyalectiformis 



C. Spores 3-5-septate 



D. Apothecia pale flesh-colored 14. B.Ravenelii 



D. Apothecia brownish red to blackish 15. B. rubidofusca 



B. Hypothecium brownish or reddish brown to brownish black 

 C. Spores 3-septate 



D. Hypothecium pale brownish to brown 



E. Thallus thin, chinky to areolate 12. B.Pammellii 



E. Thallus thicker, granules becoming sublobulate .... 18. B.artyta 

 D. Hypothecium reddish brown to brown 



E. Thallus scurfy or granulose, forming a thin 



chinky crust 22. B. trachona 



E. Thallus granulose, often disappearing 



F. Thallus thin; disk flat to convex 21. B.granosa 



F. Thallus thicker; disk convex to subglobose . . 20. B.microcarpa 



C. Spores 3-7-septate 24. B. caudata 



A. On trees, old wood, soil, and moss 

 B. On trees 



C. Hypothecium hyaline 



D. Apothecia yellowish to reddish or flesh-colored 



E. Spores 10-15 X 2.5-4 fi 1. B. floridana 



