Floating form: stipe up to 30 cm long, usually hairless. Leaflets up to 26 × 25 mm, broadly obdeltate, outer margin rounded, entire, hairless. Dry land form: stipe up to 8 cm long. Leaflets ± 7 × 5 mm, narrowly obdeltate, outer margins deeply crenate, slightly hairy at beginning. Sporocarps: 3-4 mm long, 2-3.25 mm high, 1.5-2 mm thick, brown, almost rectangular in lateral view, upper side shallowly concave, under side convex, outer side rounded, vertical cross-section narrowly rectangular, continuous shallow groove from upper over outer and along lower side; densely hairy when young becoming hairless with age; inferior tooth a shallow hump or absent, superior tooth rather short, subacute; lateral ribs hardly visible in mature specimens; pedicels up to 8 mm long, cylindrical, wiry, erect or arching, 2 or 3 uniting at the base, sometimes solitary, arising from the axil of the stipe.

Recognizable by the prominent upper tooth on the sporocarp, 2 or 3 pedicels uniting at base, sporocarps rectangular outline in vertical cross-section.

apposita: side by side, the pedicels are united in twos or threes at the base giving the sporocarps a closely packed appearance.

Sandy wet soil in river beds, edge of seasonal pools.

See African distribution.

Botswana, South Africa, Zimbabwe.

Aquatic, terrestrial.