10 NEW OR RARE SPECIES OF TASMANIAK HEPATIC^. 



dentate, bracteole ovate-acute, slightly dentate ; perianth ovate- 

 cylindric, deeply, 4-6 plicate, mouth incurved, denticulate ; 5 

 branches postical, perigonial leaves -6-8 pairs cordate, cucuUate. 



Dioicous ; ^ and $ entangled in the same tufts, but on 

 separate stems, loosely intricately C89spitose,prostrate, flagelli- 

 ferous ; flagella rooting at the end, clothed with minute leaves. 

 Stems filiform, julaceous, about ^ in. long, of a reddisli-brown 

 colour, slightly branched, rigid, serpentine, about the thickness 

 of horsehair, a cross section showing it to be composed of 

 small, thick, opaque cells, branches postical. Leaves very 

 closely appressed to stem, imbricate or approximate, obliquely 

 erect, alternate cr subopposite, succubous, entire, ovate, 

 broadly ovate or cordate-obtuse, reddish-brown, with a paler 

 hyaline border ; cells smallish, quadrate or oblong-quadrate, 

 4-5 sided, trigones none, marginal cells 3 rows deep, smaller, 

 and with thinner walls. Fertile stems suddenly bent upwards. 

 Bracts accresent, 2nd pair irregulary dentate, innermost 

 larger, broader than long, acutely and deeply 6-10 laciniate- 

 dentate. Bracteole ovate-lanceolate, slightly dentate on one 

 side. Perianth projecting half beyond bracts, oval, 4-6 plicate, 

 composed of one layer of cells, about 100 cells round near the 

 middle upon a cross section, mouth wide, slightly incurved, 

 faintly denticulate. Pistillidia 12-15 long. Plant $ on postical 

 branches, perigonial leaves larrger, 6 to 8 pairs, hooded, 

 unidentate near base on one side, monandrous, antheridia 

 oblong-orbicular. 



Measurements : Stems, from J to |^ in- long, -2 mm to 'd 

 mm diam .; leaves, '36 mm long X '45 mm broad, '45 X -85, 

 •4 X -3, -375 X -35, -36 x -3 ; cells, 1-40 mm, -03 mm x -025 

 mm, "03 X -02, '025 x -02 ; second bract, '4 mm broad x "4 mm 

 high ; innermost bract, "75 mm x -65 mm, -65 x -55 ; brac- 

 teole, "6 mm high x •4 mm broad near base; perianth, 1*5 

 mm long x -Q mm broad ; perigonial leaf, '4 mm long x -5 

 mm broad ; pistillidia, "3 mm long x -06 mm broad ; 

 antheridia, 2 mm x -15 mm, 



Hab., near top of Mount Wellington, December 25th, 1885. 

 275. 



Obs.— This minute and very beautiful species resembles a 

 microscopic form of Jung. (Jamesoniella) ruhella,, Spruce, but 

 is abundantly distinct from that or any known species. 



Description of PI. VII. — Fig. 1, plants nat. size; 2, fertile 

 stem X 24 ; 3-6, leaver x 85 ; 7, portion of leaf x 290 ; 8, 

 second bract x 85 ; 9, 10, innermost bracts x 64; 11, bracteole 

 X 64; 12, perianth x 51; 13, cross section of perianth; 

 14, pistillidia x 85 ; 15, perigonial leaf x 85 ; 16, airtheridium 

 X 85. 



