HANDBOOK OF BRITISH HEPATIC^. 217 



and Rabh. Exs. No. 453, 535. Nardia emar- 

 ginata 8 picea, Carr. Br. Hep. p. 14. 



On rocks. 



var. laxior, Carr. and Pears. Exs. No. 80. 



The plant is intensely black, a warm brown 

 by transmitted light, barren shoots \ inch, pros- 

 trate at the base, with pectinate pinnate leaves, 

 exactly round inflexed obtuse lobes, and acute 

 sinus, equal to one-third or one-fourth of the length, 

 very convex and narrowed at the base ; fertile 

 shoots stouter, with large involute involucral leaves 

 which nearly hide the short roundish involucre ; 

 leaf cells smaller than in var. minor of TV. emarginata; 

 the marginal ones more minute ; the perigonial 

 leaves are fewer in number, and terminal. Carr. I. c. 

 (Plate s, fig. 66.) 



Nardia revoluta, N., Lindb. 



Stems matted and stoloniferous at the base, 

 densely tufted ; leaves subcomplicate, erecto- 

 patent, imbricate when dry, rigid, round or 

 elliptic from a narrower half-embracing base, 

 deeply and acutely bidentate, margin narrowly 

 reflexed throughout ; involucral leaves re- 

 sembling those of the stem but larger. 



Sarcoscyphus revolutus, Nees Leberm. II., 

 4I9> iv., 34. Jungermannia atrata, Mitt. 

 Hep. E. Ind. p. 90. Nardia revoluta, Carr. 

 Grevillea II., p. 88, t. 18, f. 19-25. Gym- 



