Marsilea farinosa Launert

Stipes slender, usually hispid, erect, c. 20-150 mm long. Pinnae without pellucid streaks. Pedicels usually curved, relatively slender, flexible, usually hispid, erect or ascending, c. 8-15 mm long. Sporocarps densely crowded at base of stipe, bean-shaped, usually horizontal, with a furrow along dorsal, frontal and ventral sides, laterally slightly bulging, flat or rarely concave; lateral ribs 8-11, inconspicuous at maturity; set with multicellular uniseriate hairs of 2 kinds: basally attached, erect ordinary cylindrical hairs, and flattened hairs laterally attached to surface of sporocarp by usually 1-celled funicle-like stalk; raphe present, covering 1/2-2/3 of sporocarp base; inferior tooth absent (or present as shallow hump); superior tooth inconspicuous; sori 8-11.