366 HEPATIGAi. 



coloured rootlets is Ncirdia [Ei/calj/x) obovata (Nees), from which 

 it is distinguished by its dioicous inflorescence, broader leaves and 

 bracts, and slightly larger cells ; from NarcJla scalarls (Schrad.) by 

 absence of stipules ; from other round-leaved species by its bracts 

 being adnata with the lower half of the perianth. 



Jungermania crenulafa, Sm., has been placed by Lindberg and 

 others in the section Eiicalyx of Nardia on account of the some- 

 times, although very rarely, sliglit attachment of the bracts to 

 the lower portion of the perianth, this so rarely happens and is so 

 slight that I have placed it next to Jmif/. spJ/aerocarjja, Hook., in 

 the subgenus Aplozhi o^i Jung er mania, which seems to me to be its 

 most natural position. 



Description of Plate CLVIII. — Fig 1. Plants natural 

 size. 2. Portion of stem, antical view x 16 (Original, Lyell). 

 3. Portion of fertile stem, antical view, x 24 (Salem, Jack.). 

 4-7. Leaves x 16 (Original, Lyell). 8. Leaf x 24 (Finland, 

 Lindberg). 9. Portion of leaf x 290 (Original, Lyell). 10. Bract 

 X 16 (ditto). 11. Perianth x 24 (ditto). 12. Pistilhdium x 

 85 (Finland, Lindberg). 13. Perigonial bracts x 24 (Salem, 

 Jack.). 



2. Nardia obovata {Nees), Carr. 



Jungermania obovata, Nees, Nat. Eur. Leb. 1 p. 332 (1833). 

 Eucahjx obovata, Lindb. Bot. Not. (1872). 

 Southbija obovata, Dum. Hep. Eur. p. 133 (1874). 

 Nardia obovata, Carr. Brit. Hep. p. 32, pi. 11, f. 3.') (1874). 

 Nardia [Eucahjx) obovata, Lindb. Muse. Scand. p. 8 (1879). 



Paroicous, csespitose, flagelliferous ; flagella small, radiculose ; 

 small, of a dark green colour. Stems procumbent, or suberect, 

 simple or ramose ; branches lateral, subpostical, proceeding from 

 the axil of the leaves or bracts ; radiculose, rootlets purple in 

 colour, short, ascending to apex of stem, often arising from base 

 of leaves and postical side of the perianth. Leaves obliquely 

 inserted, horizontal, slightly decurrent antically, alternate, im- 

 bricate or contiguous, gradually becoming more distant and 

 smaller lower down, in sterile stems they become smaller and 



