2l6 HANDBOOK OF BRITISH HKPATICJE. 



Nardia robusta, Du. 



Growing in tufts, stems erect (iij c. m.), in- 

 novant at the apex, robust, leaves olive or 

 rubiginous, circular when expanded, with an 

 obtuse, rather lunate, shallow sinus at the 

 apex ; when growing, loosely imbricate, dis- 

 tichous, deeply concave. 



Sarcoscyphus Ehrhardtii robustus, De Not. 

 Comm. Ital. fig. iv. Nardia robusta, Lindb. 

 Carr. and Pears. Exs. No. 157. 



Dr. Carrington writes that : " N. robusta Lind. 

 seems to me only a stouter variety of N. emarginata 

 with nearly black stems and more distant, cordate 

 leaves, which are seated at right angles with the 

 stem, less concave, sometimes plane or slightly 

 convex, and of firmer texture. The colour is an 

 obscure indigo green, turning black, but otherwise 

 scarcely altered when dry." 



Nardia alpina, Carr. 



Dioicious. Densely caespitose, stems rigid, 

 leaves patent, approximate, orbiculate, verti- 

 cally concave, lobes obtuse, connivent, sinus 

 acute ; involucral leaves larger, convolute, in- 

 volucre short, nearly immersed ; cells smaller, 

 glossy pitch black. 



Nardia alpina, Carr. and Pears. Exs. No. 

 79, 158(7, 158^. Sarcoscyphus alpinus, Gott. 



