s 



W. H. PEARSON. 



[No. 14. 



Monoica, minuta, albida viridiave, cladocarpa, supra alias 

 hepaticas reptans, parce flagellifera. Caulis parce ramosus. Folia 

 distantia, erecto-patentia, complicata, ovalia subquadratave, 

 adusque V2 bifida, segmentis acutis, sinu acuto rare obtusato, 

 margine integerrimo; cellulæ minutæ, quadratæ. Foliola nulla. 

 Bracteæ foliis majores, connatæ, subrotundæ, orbiculatæ sub- 

 quadratæve, ad 7*— Vs bifidæ; segmentis acutis, sinu obtusove, 

 margine denticulata; bracteolæ bracteis connatæ, subquadratæ 

 adusque 1 / 2 acute bifidæ, segmentis acutis; margine denticulato. 

 Perianthia lineari-fusiforraia, 3— 5-carinata, unistrata, ore setulosa. 



Androecia rami apices tenentia. 



Monoicous; very minute; pale green or hyaline; 2 flowers on 

 long or short postical branches, rarely terminal on main stem; 

 creeping amongst other hepaticæ; flagelliferous, flagella few, 

 minutely leafy or naked. Stems simple or slightly branched, 

 about 8 cells in diameter, cortical cells in 15 — 20 rows, brown 

 and larger than the inner; radiculose, rootlets frequent, hyaline. 

 Lea ves distant, erecto-patent, complicate; when flattened out, oval 

 to subquadrate, bifid to about the middle, segments acute, sinus 

 acute or rarely obtusate, margin entire. Cells minute, quadrate 

 or oblong-quadrate, walls firm, trigones none. No underleaves. 

 Bracts much larger than the leaves, connate with each other 

 and with bracteole on one or both sides, subrotund, orbicular or 

 subquadrate, bifid down to or to the middle, segments acute 

 or obtuse, margin denticulate. Bracteole subquadrate, bifid to 

 the middle, sinus and segments acute, margin denticulate. Peri- 

 anth projecting very much ( 3 / 4 ) beyond the bracts, lineari-fusi- 

 form, 3— 5-carinate, composed of one layer of cells, mouth small, 

 setulose. Androecia terminal on the postical branches, or rarely 

 on the main stem ; perigonial bracts rather larger than the stem 

 leaves, imbricate, ventricose. 



Dimensions. Stems 5. mm. long, with leaves .25 mm. wide, 

 diam. of stem .1 mm., leaves .175 mm. X -175 mm., segments 

 .085 mm., .175 X .125 seg. .085, .15 X .125 seg. .075, .15 X .15 

 seg. .075, cells .0125 mm., .015 mm. .02 mm. X .015 mm., 

 subbract .275 mm. X .25 mm. seg. .125 mm., subbracteole .2 



