TATELLARIA. 359 



Order VI.— PATELLARIACEJE. Fries (in part). 



Cup3 sessile, subcoriaceous or horny, glabrous, or- 

 bicular, rarely closed at first, plane or slightly concave, 

 black or dark-coloured (except P. pallida); asci cylin- 

 draceo-clavate ; sporidia 8, coloured or hyaline; epiphytal. 

 (Plate XL figs. 70-72.) 



Arrangement of the Genera. 



I. Patellar fa. Fries. III. Laquearia. Fries. 



II. Heterosphxria. Grev. 



Key to the Genera. 



Cups open from the first . . . . . . . . Patellarfa. 



Cups covered with a superior deciduous excipulum Laquearia. 



Cups at first closed, globose . . . . . . . . Heterosphteria. 



Genus I. — Patellaria. Fries. 



Excipulum between coriaceous and horny, naked, 

 black, open from the first; disc punctiform, becoming 

 gradually dilated, firm, acigerous, persistent. (Plate XI. 

 fig. 70.) 



Arrangement op the Species. 



A. Sporidia elliptic. 



(a) Coloured . . . . . . . . species 1-3 



(b) Hyaline, simple . . . . . . ,, 4 



(c) Hyaline, septate . . . . . . „ 5 



B. Sporidia oblong or oblong-elliptic. 



(a) Hyaline, simple . . . . . . „ 6 



(6) Hyaline, septate . . . . . . „ 7-13 



C. Sporidia subclavate. 



(a) Hyaline, septate .. .. .. „ 14-16 



D. Sporidia fusiform or linear-fusiform. 



(a) Hyaline, simple . . . . . . „ 17, IS 



(6) Hyaline, septate . . . . . . „ 19-21 



E. Sporidia filiform . . . . . . . . „ 22 



Doubtful species . . . . . . . . „ 23, 24 



Key to the Species. 



Hymenium white . . . . . . . . . . atro-alba. 



Hymenium pallid . . . . . . . . . . pallida. 



Hymenium citrine . . . . . . . . . . citrina. 



Hymenium olivaceous . . . . . . . . olivacea. 



Hymenium subpruinose; sporidia large .. .. atrata. 



Hymenium black . . . . . . . . . . 1 



Hymenium fuliginous or blackish-brown . . . . 3 



