cells somewhat equally thick walled, irregular in size, but arranging around midrib from 12 to 20 leaves bifid, lobes equal no trichomes subacute, sinus acute, lobes close together to 4 mm long x almost as wide, gradate or antirrh cells papillose antheridium tw. 150 µ leaves concave cells same base to apex lobes wide apart sinus acute to subacute tract & fid entire leaves often concave sometimes caniculate sinus acute to obtuse, usually somewhat connivent lobes subacute to obtuse cellular tract are swollen (ventricose) & more obtuse than ordinary leaves perianth mouth crenulate, up to 2 cells long. leaves subgradate to subretuse divergent, frequent, long to near apex hyaline to darkly hyaline insertion transverse with no sign of decurrency.