fern-allies. Rhizome with lateral roots spreading from the creeping stipe and
rooting at intervals. Stipe procumbent, erect lateral branches unbranched
towards the base and the ultimate branches terete and radially oriented. Fronds
monopodially oriented. Stele plectoto mixed haplostele. Vegetative fronds
whorled, isomorphic, subulate, curved upwards and hairy. Sporophylls aggregated
into cones, peduncle absent. Sporangia foliar and divides into two unequal
valves. Spores regulate. Gamotophyte more or less conical, tapering towards,
truncate ends bear numerous lobe.