JUNGERMANIA. 357 



branched ; leaves obliquely inserted, enuirginate, margin remark- 

 ably recurved ; stipules absent ; perianth laterally compressed, 

 upper portion plicate, mouth constricted. 



33. Jungermania orcadensis, Hook. 



Jimyermania orcadensis, Hook. Brit. Jung. t. 71 (IMl(l). 

 Mesophylla (?) orcadensis, Dum. 8yll. Jung. p. 80 (IH:;!). 

 Mesophylla orcmlensis, Dum. Hep. Eur. [>. I'M) (1S71). 



Dioicous, loosely csespitose, largish, brownish-green or dark 

 reddish-brown in colour. Stems simple, or with a few innovant 

 branches arising from the postical side of axil of leaf-subpostical, 

 or truly postical, arising from the postical side of stem ; outer 

 layers of stem dark coloured, inner white ; erect or ascending, 

 flexuose, filiform, reddish-brown in colour; radiculose, rootlets 

 short, dense, ascending to apex of stem, dull white. Leaves 

 obliquely semivertically inserted, closely imbricate, or when 

 young, smaller and approximate, horizontal or slightly ascending, 

 spreading or secund, semi-amplexicaul, antical margin decurrent, 

 broadly ovate to cordate, emarginate, sinus shallow, rounded, 

 segments acute, margin entire, upper (remarkably so) and lower 

 recurved, concave at base ; texture somewhat thin but firm ; 

 epidermis smooth; cells small, roundish to roundish-oblong, 

 guttulate, walls thick, angles thickened, no trigones. Stipules 

 wanting, except where the innovant branches arise, irregular in 

 shape, much broader than long, usually 4-laciniate, the two 

 middle segments often long and acute. Bracts 2, large, recurved 

 above, the outer one embracing the inner, usually trilobate (2-4), 

 sinus somewhat acute, segments more or less acute. Bracteole 

 large, very broad, surrounding the lower half of the perianth, 

 deeply 4-laciniate (often with G lacinice), segments unequal, some 

 triangular, others smaller and more acute, the smallest and most 

 acute at the margins. Perianth projecting somewhat beyond the 

 bracts, slightly arcuate, narrowly oblong (below somewhat 

 narrower than above), distinctly laterally compressed, upper third 

 portion deeply plicate, with 5, sometimes more, rounded fold.*^, 



