218 33. LECIDEACEAE [123. Catillaria 



C. Apothecia more than 0.2 mm. across 

 D. Spores not more than 14 fi in length 



E. Thallus granulose 16. C. lenticularis 



E. Thallus chinky-areolate IS. C. chalybeia 



D. Spores 14-22 X 3-5 fi 8. C. franciscana 



B. On trees and old wood 



C. Hypothecium hyaline to yellowish or brownish 



D. Thallus greenish gray, ashy white, to ashy or yellowish 



E. Apothecia pale yellow or lead-colored 1. C.micrococca 



E. Apothecia flesh-colored or lead-colored to brown 

 or black 



F. Apothecia small, not more than 0.5 mm. across 

 G. Apothecia 0.25-0.5 mm. across, lead-colored 



or dull brown to black 5. C. globulosa 



G. Apothecia 0.15-0.25 mm. across, flesh-colored 



to brown or blackish 4. C. tricolor 



F. Apothecia large, 1-1.8 mm. across 10. C.endochroma 



D. Thallus greenish gray to brownish or blackish green 

 E. Apothecia not more than 0.7 mm. across 



F. Apothecia pale to reddish brown, finally black ... 6. C.prasina 

 F. Apothecia purplish black to black . . . . 11. C. atropurpurea 



E. Apothecia 0.8-1.5 mm. across 9. C. leptocheila 



C. Hypothecium brownish to brown or black 

 D. Spores not more than 18 fi in length 



E. Apothecia 0.2-0.45 mm. across . . . ... . . 13. C. glauconigrans 



E. Apothecia 0.4-1 mm. across 12. C. Laureri 



D. Spores 20-28 X 8-16 fi 14. C. grossa 



1. Catillaria micrococca (Koerb.) T. Fries, Lich. Scand. 1:571. 1874. 

 Biatora micrococca Koerb., Par. Lich. 155. 1865. 



Thallus thin, scurfy or minutely granulose, pale greenish to ashy; apothecia 

 very minute, 0.1-0.3 mm. across, adnate, often clustered to confluent, the disk 

 strongly convex, pale yellow or lead-colored, the exciple absent or soon disappear- 

 ing; hypothecium hyaline; spores oblong-ellipsoid, rarely non-septate, 8-14X2.5- 

 4.5 p. 



On trees, Massachusetts. 



2. Catillaria terrena (Willey) Zahlbr., Cat. Lich. Univ. 4:79. 1926. 



Biatora terrena Willey, Enum. Lich. New Bedford, Mass. 23. 1892. 



Thallus thin, composed of large, coarse, crenate, yellowish to reddish yellow 

 granules; apothecia minute, 0.1-0.2 mm. across, sessile, the disk convex, yellowish 

 flesh-colored, the exciple absent or soon disappearing; hypothecium hyaline; spores 

 ellipsoid, 14-18 X 3.5-5.5 /*. 



On soil, Massachusetts and Illinois. 



3. Catillaria flavens (Willey) Fink n. comb. 



Biatora flavens Willey, in Tuck., Syn. N. A. Lich. 2:34. 1888. Bacidia flavens 

 (Willey) Zahlbr. 



Thallus thin, chinky, yellowish ashy; apothecia minute, 0.1-0.2 mm. across, 

 adnate, the disk flat to convex, wax-colored, the exciple thin, soon disappearing; 

 hypothecium hyaline; spores ellipsoid to oblong-ellipsoid, 7-12 X 2-3 /x, rarely 

 2-septate. 



On granitic rocks, near New Bedford, Massachusetts. 



4. Catillaria tricolor (With.) T. Fries, Lich. Scand. 1:574, 575. 1874. 



Lichen tricolor With., Arr. Brit. PL ed. 3:20. 1796. Biatorina tricolor (With.) 

 Stein. Biatorina tricolor var. atlantica (Tuck.) Fink. Biatora mixta E. Fries. 

 Biatorina griffithii (Sm.) Mass. Biatora mixta var. atlantica Tuck. C. tri- 

 color var. atlantica (Tuck.) Zahlbr. 

 Thallus thin, ashy white, smooth, becoming minutely granulose, chinky, or 

 wrinkled-verrucose; apothecia minute, 0.15-0.25 mm. across, adnate, the disk flat 

 to slightly convex, flesh-colored to brown and blackish, the exciple paler, thick, 



