808 EEPATICJ^J. 



Barrow at the base, soon falling off, smooth, obscurely 4-, 5-plicate 

 oni)^ at the very apex, composed of a single layer of cells, about 

 100 round at the middle, near the base and up to -J- of its height 

 bistratose, mouth somewhat contracted, dentate, 8 to 16 teeth, 2 

 or 3 cells wide at the base, incurved. Pistillidia 8-10. Calyptra 

 ovate, reticulate, very delicate. Capsule oval, brown ; spores 

 small, fulvous brown ; elaters same colour, broad as the spores. 



Male stems similar to the others, $ terminal, 3, 4 pairs of 

 bracts, imbricate, ventricose ; antheridia large, 1 or 2 at the base 

 of each bract. 



Fruits very rarely, May, June. 



Dimensions. — Stems |- to 2 inches long, diam. -15 mm. to 

 •2 mm., with leaves from 1"25 mm. to 2' mm. wide; leaves 

 I'l mm. X "8 mm., segments "25 mm., l" mm. x '6 mm., seg- 

 2 mm., 75 mm. x "65 mm., seg. "IS mm.; cells "02 mm. 

 X "035 mm., 02 mm. x 03 mm., '02 mm., "03 mm., '025 mm.; 

 stipules "2 mm. x "05 mm. broad at the base; bracts "G mm. 

 X '45 mm., seg. 15 mm., 45 mm. x "4 mm., seg. "1 mm. ; perianth 

 3" mm. X 1*25 mm., 225 mm. x '9 mm.; teeth at the mouth 

 •125 mm., '05 mm.; spores "015 mm. diam.; elaters '09 mm. 

 x'015 mm.; perigonial bracts "9 mm. x '9 mm.; antheridia 

 2 mm. X 175 mm. 



Hab. — Growing often in very densely matted patches of con- 

 siderable extent, or floating in water in bogs and marshy places, 

 generally distributed. 1 to 18. I. 



Found on the Continent and in North America. 



Obs. — A distinct species, and not likely to be confused with 

 any other, except CepJia/ozia Jiicifans (Nees) Spruce, which may at 

 first sight be mistaken for it, has obtusely-lobed leaves, and is 

 found in similar situations to the lax bog form ; " it is distinguished 

 by the stem rooting by numerous stout flagella, branches whether 

 foliiferous or floriferous all postical, the longer, narrower and 

 more laxly-reticulated leaves ; the constant presence of stipules ; 

 the cladocarpous inflorescence ; the tristichous female bracts, 

 toothed at the base, the innermost embracing the perianth ; finally 

 the linear-fusiform, trigonous, thin perianth." E. S. 



