208 33. LECIDEACEAE [119. Lecidea 



85. Lecidea limosa Ach., Lich. Univ. 182. IS 10. 



Thallus composed of minute, convex, scattered or heaped, greenish gray to 

 ashy granules; apothecia small to middle-sized, 0.5-1 mm. across, adnate, some- 

 times crowded, the disk strongly convex, black, the exciple very thin,_ black, soon 

 disappearing; hypothecium brownish to reddish brown; spores ovoid, 10-18 X 

 4-6/*. 



Over mosses on soil, Colorado. 



86. Lecidea fusca (Schaer.) T. Fries, Nov. Act. Soc. Sci. Ups. III. 3:283. 1861. 

 L. sphaeroides var. fusca Schaer., Lich. Helv. Spic. 166. 1833. 



Thallus thin, greenish to grayish white, minutely granular and rough, finally 

 disappearing; apothecia small to middle-sized, 0.5-1 mm. across, adnate to sessile, 

 the disk flat to strongly convex, brown to blackish, the exciple thin and disappear- 

 ing; hypothecium light or darker brown; spores oblong-fusiform, 10-16 X 4-6 u. 



On mosses, Maine. 



87. Lecidea planetica Tuck., Syn. N. A. Lich. 2:131. 1888. 



Thallus thin, widespread, verrucose, greenish gray; apothecia minute to small, 

 0.2-0.4 mm. across, numerous, the disk convex, black, the exciple inconspicuous and 

 disappearing; hypothecium dark brown and blackish; spores ovoid-ellipsoid, 5-8 X 

 2-3.5 fx. 



On rocks, Pennsylvania and New Jersey. 



88. Lecidea latypea Ach., Meth. Lich. Suppl. 10. 1803. 



Thallus thickish, verrucose-areolate, whitish to pale ashy, the areoles small, 

 flatfish or becoming round and subglobular, scattered or crowded, sometimes mi- 

 nutely granulose; apothecia small to middle-sized, 0.4-1.5 mm. across, partly im- 

 mersed to adnate, becoming irregular and lobed, the disk flat to finally convex, 

 black, the exciple paler, thin, finally disappearing; hypothecium brown; spores 

 short-ellipsoid, 10-15 X 5-8 lk. 



On rocks, southern California, and, according to Hasse, in the eastern and 

 southern states. 



f. aequata (Ach.) Arm, Flora 67:562. 1884. 



L. coniops var. aequata Ach., Lich. Univ. 171. 1810. L. enteroleuca var. aequata 

 (Ach.) Tuck. 



Thallus thin and smooth, becoming chinky and subareolate, or tending to dis- 

 appear, ashy. 



On rocks, widely distributed throughout the United States. 



89. Lecidea aglaea Sommerf., Suppl. Fl. Lapp. 144. 1826. 



Thallus thick, widespread, rough, verrucose-areolate, the areoles becoming 

 swollen, convex and wrinkled, crowded, forming an unequal pale yellow crust, the 

 hypothallus black; apothecia middle-sized to large, 0.7-1.5 mm. across, immersed 

 to adnate, the disk becoming convex, black, the black exciple disappearing; spores 

 ellipsoid, 10-16 X 5-8 /x. 



On rocks, New Hampshire and New York. 



90. Lecidea grisella Floerke, in Flot., Siles. nos. 141, 142. 1829. 



Thallus moderately thick, greenish gray to ashy, composed of small, flat to 

 convex areoles, making a continuous crust; apothecia middle-sized to larger, 0.5- 

 1.3 mm. across, partly immersed, often clustered and angular, the disk flat or 

 slightly convex, black or obscurely gray-pruinose, the exciple entire, black; hypo- 

 thecium dark brown; spores oblong-ellipsoid, 10-14 X 6-7 jx. 



On rocks, Santa Cruz Peninsula, California. 



91. Lecidea contigua E. Fries, Sched. Crit. Lich. Exsicc. Suec. fasc. 13, 14. 1827. 

 L. contigua var. convexella (Vainio) Fink. L. contigua var. hydrophila E. Fries. 



L. crustulata (Ach.) Floerke. 

 Thallus more or less rough, chinky to subareolate, greenish gray to ashy, 

 irregularly spread over the substratum, sometimes thin and scattered; apothecia 



