340 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



4. 0. SORATAMUM 

 Plate 87 



Fig. 4. Odontoschisma soratamum . 4 a. Stem, dorsal view, X 20. 4 b. Stem, dorsal view, 

 X 50. 4 c. Cells from the apical margin of a leaf, X 275. 4 d. Cell from the upper part of a leaf, 

 X 500. 4 e. Transverse section of a stem, X 275. 4 f. Female inflorescence, X 50. 4 g. Female 

 bracteole, inner series, X 70. 4 h. Female bract, innermost series, X 70. 4 i. Portion of the 

 perianth mouth, X 200. Drawn from the type. 



6. Odontoschisma denudatum (Nees) Dumortier, Recueil Obs. Jungerm. 19. 



1835. 7 



Odontoschisma subrotundijolium Stephani, Spec. Hep. 3: 372. 1908. 

 Odontoschisma guadeloupense Stephani, Spec. Hep. 3: 374. 1908. 



Plants of medium size, in green, brownish or reddish mats or among other bryo- 

 phytes; stems to 5 cm long, with leaves, to 2 mm wide, the tips often becoming 

 erect, radial, small-leaved and gemmiparous; branches ventral-intercalary, leafy, 

 flagelliform (stolon-like) or short sexual. Rhizoids long, colorless, from the ventral 

 side of the stem and over the stolons. Line of leaf insertion oblique. Leaves spreading 

 but tending to be ascendant, broadly ovate or rounded-ovate, occasionally retuse, 

 imbricate, usually concave, more or less bordered by thick-walled cells; cells of the 

 border averaging 15 fj., those just below the border larger, 15-24 X 20-24 ft, with 

 thin-walled pits and large knot-like trigones, the cell cavities stellate, the cuticle 

 papillose. Underleaves very small, few-celled. Plants dioicous. Male inflorescence 



7 See a manual of North American or European Hepaticae for the long list of synonyms for 

 this widespread predominantly North Temperate species. 



