220 33. LECIDEACEAE [ 123. Catillaria 



the disk flat to convex, black, the exciple thin, yellowish green, becoming black, 

 irregular and finally disappearing; hypothecium brownish; spores 8, ellipsoid, 

 slightly curved, 15-18X4.5-6/*. 

 On trees, California. 



11. Catillaria atropurpurea (Schaer.) T. Fries, Lich. Scand. 1:565. 1874. 

 Lecidea sphaeroides var. atropurpurea Schaer., Enum. Lich. Eur. 140. 1850. 



Biatorina atropurpurea (Schaer.) Mass. 



Thallus thin, minutely granulose to slightly chinky or scurfy, rarely sorediate, 

 ashy, varying toward greenish or brownish, sometimes disappearing; apothecia 

 minute to small, 0.2-0.7 mm. across, slightly immersed to adnate, the disk flat 

 to strongly convex, purplish black to black, the exciple soon disappearing; hypo- 

 thecium hyaline; spores ellipsoid, 10-16 X 3.5-6 /i. 



On trees, New England, Florida, Alabama, Illinois, Minnesota, and California. 



12. Catillaria Laureri Hepp, in Arn., Exsicc. no. 353. 1867. 

 Biatora Laureri (Hepp) Tuck. 



Thallus thin to thickish, smooth to wrinkled, scurfy, or chinky, dusky gray 

 to ashy white; apothecia small to middle-sized, 0.4-1 mm. across, sessile, the disk 

 flat to convex, often roughened, black, the exciple paler, thin, soon disappearing; 

 hypothecium blackish brown; spores ellipsoid to fusiform, 10-18X3-7//.. 



On trees, rarely old wood, New England, Florida, Oregon, and California. 



13. Catillaria glauconigrans (Tuck.) Hasse, Bryologist 12:102. 1909. 

 Biatora glauconigrans Tuck., Proc. Am. Acad. 12:179, 180. 1877. 



Thallus thin, composed of continuous or scattered, small, round, greenish gray 

 to ashy granules; apothecia minute to small, 0.2-0.45 mm. across, adnate to ses- 

 sile, the disk flat to convex, pale' lead-colored to black, the exciple colored like the 

 disk, soon disappearing; hypothecium brown to brownish black; spores oblong- 

 ellipsoid, 6-12 X 2.5-4 /x. 



On trees, Massachusetts and California. 



14. Catillaria grossa (Pers.) Blomb., Vet. Akad. Fordhandl. 24:122. 1867. 

 Lecidea grossa Pers., in Nyl., Act. Soc. Linn. Bord. 21:385. 1857. Heterothe- 



cium grossum (Pers.) Tuck. 



Thallus thin, smooth to wrinkled or chinky-areolate, greenish gray to ashy, 

 sometimes disappearing; apothecia middle-sized, 0.7-1.5 mm. across, sessile, the 

 disk flat to strongly convex, black, the exciple paler, thick, finally disappearing; 

 hypothecium black; spores ovoid-ellipsoid, 20-28 X 8-16 /x. 



On trees, Nebraska. 



15. Catillaria chalybeia (Borr.) Mass., Ric. Lich. 79. f. 161. 1852. 



Lecidea chalybeia Borr., in Hook, and Sowerby, Engl. Bot. Suppl. 1 : pi. 2687, 

 f. 2. 1831. Biatorina chalybeia (Borr.) Mudd. 



Thallus thin, smooth to finely chinky-areolate, ashy gray to darkening, becom- 

 ing inconspicuous and rarely disappearing; apothecia minute to small, 0.3-0.5 mm. 

 across, adnate to sessile, the disk concave to slightly convex, black, the exciple 

 of the same color, rarely covered; hypothecium dark brown; spores long-ellipsoid, 

 9-12 X 3-4.5 /*. 



On rocks, Maine, Ohio, and southern California. 



16. Catillaria lenticularis (Ach.) T. Fries, Lich. Scand. 1:567. 1874. 



Lecidea lenticularis Ach., Syn. Meth. Lich. 28. 1814. Biatorina lenticidaris 

 (Ach.) Koerb. C. lenticularis f. acrustacea (Hepp) Hasse. 



Thallus thin, smooth to slightly rough and granulose, ashy white to greenish 

 or brownish gray, sometimes disappearing; apothecia minute to small, 0.25-0.5 

 mm. across, adnate, numerous, the disk flat to slightly convex, black, the exciple 

 of the same color, thin, finally disappearing; hypothecium pale brown to dark 

 brown; spores long-ellipsoid, 8-14 X 2.5-5 /*. 



On rocks, Ohio and California. 



