PATELLARIA. 



359 



Order VI. PATELLARIACE^. Fries (in part). 



Cups 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. Patellan'a. Fries. III. Laquearia. Fries. 



II. Heterosphseria. Grev. | 



KEY TO THE GENERA. 



Cups open from the first . . . . . . . . Patellan'a. 



Cups covered with a superior deciduous excipulum Laquearia. 



Cups at first closed, globose . . . . . . . . Heterosphaeria. 



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. 



(/<) Coloured 



(&) Hyaline, simple 



(c) Hyaline, septate 



B. Sporidia oblong or oblong-elliptic. 



(a) Hyaline, simple 

 (6) Hyaline, septate 



C. Sporidia subelavate. 



(a) Hyaline, septate 



D. Sporidia fusiform or linear-fusiform. 



(a) Hyaline, simple 

 (6) Hyaline, septate 



E. Sporidia filiform 



Doubtful species 



KEY TO THE SPECIES. 



Hymenium white 



Hymenium pallid 



Hymenium citrine 



Hymenium olivaceous 



Hymeuium subpruinose ; sporidia large 



Hymenium black 



Hymeuium fuliginous or blackish-brown 



species 1-3 

 4 

 i, 5 



6 

 7-13 



14-16 



17, 18 

 19-21 

 22 



23,24 



atio-alba. 



pallida. 



citrina. 



olivacea. 



atrata. 



I 



3 



