1887.] 



HEPATICAE KNYSNANAE. 



4 outer layers of cells smaller and darker, axial cells 4 X 

 4, larger and hyaline; irregularly pinnate, with short white 

 rootlets. Leaves partly clasping the stem, succubous or 

 transverse, erect, or patent at an angle of 40 (20 — 60) 

 distant, rarely contiguous, broadly ovate or rotund when 

 flattened out, bifid to a 7* — sinus acute or rounded, seg- 

 ments complicate or divergent, one usually larger than the 

 other, triangular, obtuse or abruptly acute, entire; cells mi- 

 nute, subquadrate, oblong-quadrate or 5 — 6 sided, walls thick. 

 trigones absent, lumen full of chlorophyll. Underleaves 

 (where present) ovate, ovate-oblong or lanceolate, usually 

 w an ting. 



Inflorescence monoicous, g on short or sometimes longish 

 branches, usually arising from near the base of the stem. 

 Bracts 3 pairs, larger than the leaves, ovate or broadly ro- 

 tund, bifid or trifid, sinus in the innermost and second row 

 acute. cloven to dentate or denticulate, in the 3rd or 

 outermost, cloven to 1 /e — 1 /- , subrotund with obtuse segments 

 entire. Bracteoles when free, ovate. Perianth cylindrical, 

 5-carinate, composed of one layer of cells, a cross-section 

 showing about 100 cells round at the middle, mouth con- 

 stricted, denticulate. Archegonia 10 to 12, small, oblong. 

 Male flowers terminal on main stem; perigonial leaves 4 to 

 8 pairs, which are sub-imbricate, erect, appressed to the 

 stem, slightly swollen at the base, broadly ovate containing 

 solitar} 7 , round antheridia. 



Measurements. Stems V2 to 3 /* in. long. .125 mm to 

 .15 mm diam. branch .075 mm diam.; leaves .25 mm long 

 X .25 mm broad seg. .075 mm, .21 mm long X .26 mm 

 broad, seg. .05 mm, .3 mm long X .20 mm broad seg. .075 

 mm; cells .015 mm X .0125 mm, .0125 mm X .0125 mm. 

 .015 mm X .015 mm, .02 mm X .015 mm, .0225 mm X 

 .0175 mm; underleaves .1 min long x .075 mm broad, .1 mm 

 X .05, .125 mm X .075 mm; outer bract .425 mm long X 

 .4 mm broad seg. .075 mm; middle bract .375 mm long X 

 .425 mm broad seg. .15 mm; inner bract .4 mm long X .41 



