718 ELVELLACEI. 



Minute, olivaceons-yellow, greyisli when dry, sessile, hemispherical, 

 fixed by a small point, minutely silky externally, margin dirty white ; hyme- 

 nium plane; asci subfusiform, bulging in the centre, often geniculate ; spo- 

 ridia oblong or elliptic fperhaps immature;. It has a Lichenoid aspect, but 

 has no crust whatever. 



2168. Patellairia atro-alba. Cooke. " Black and white 



Patellaria." 



Gregarious or scattered, small, sessile, at length j)lane, black; 

 disc white; sporidia fusiform, 7-septate, hyaline. 



On decorticated sticks. Shere (E. C). 



Variable in size, usually gregarious, but always small ; readily dis- 

 tinguished from its allies by the white disc ; sporidia broadly fusiform ("OOIS 

 in.) 03 m.m. long. 



2169. Patellaria discolor. Mont. " Umber Patellaria." 



Ceraceous, suberumpent, gregarious, sessile, piano -patellate; 

 externally umber-brown ; disc waxy- yellow ; asci clavate ; spo- 

 ridia fusiform, hyaline, with 4 nuclei.. — Mont. >%/^. p. 190. 

 Berk. Outl.p. 373. 



On fallen branches. [Low. Carolina.] 



2170. Patellaria proxima. B, ^ Br. " Allied Black 



Patellaria." 



Orbicular, shield-like, depressed, somewhat immersed, black; 

 asci clavate ; sporidia oblong, obtuse at either end, slightly 

 curved. 4-5 septate. — Ann. N.H. no. 965, 1. 16,/. 18. 



On dead oak. Dec. Barking. 



Closely resembling P. atrata, but differing materially in the fruit. 



2171. Patellaria atro-vinosa. Blow. ** Purplish Patellaria." 



Gregarious ; disc minute, round, or of irregular outline, 

 almost black, distinctly margined ; margin of a vinous purple 

 colour; sporidia almost colourless, but with a greenish tinge, 

 narrowly almond-shaped or curved ; endochrome tripartite. — 

 Curr. Linn. Trans, xxiv.^. 155, t. 25, /. 31. B. ^ Br. Ann. N.H. 

 no. 1078. 



Gopsal, near Twycross. 



Tlie description is taken from the dried plant. The specimens grew in a 

 densely crowded manner, and the difference in colour between the disc and 

 margin is very striking. Sporidia ('0009 in.; '022 m.m. long. 



