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Flowers 1 or 2 in the angles of the branches and 1–several at the ends of the usually very short uppermost branches; spathellas ellipsoid to obovoid, tearing irregularly at the tip at anthesis, the flowers at first inverted (reflexed) within the spathella, later borne erect on the pedicel outside the ruptured spathella.
Scale-like leaves 1 ? 0.5 mm, tridentate with triangular teeth 0.2–0.3 mm long, these leaves becoming longer immediately below the spathellas, increasing to 1.5 ? 0.3–0.4 mm with teeth up to 0.7 mm long.
Stems tough, somewhat fleshy, up to 20 cm long, branched or simple, with scale-like leaves usually scattered on the stem and submerged branches but densely imbricate on the inflorescence branches.
Leaves exstipulate, 3–5 cm long, dichotomously or trichotomously divided into filiformsegments.
Ovary 2 ? 1.2 mm, ellipsoid; gynophore 0.5 mm long; styles filiform, 1–1.3 mm long.
Bracts and bracteoles 1.5–2 cm long, dichotomously branched, segments filiform.
Stamens 2, filaments c. 1.5 mm long, joined for more than half their length.
Seeds 0.4 ? 0.16 mm, ellipsoid; testa reticulate.
Pedicels elongating to 6–7 mm after anthesis.
Anthers 1.5 ? 0.3–0.4 mm; pollen in monads.
A much-branched submerged perennial herb.
Thalloid part ribbon-like, c. 1 mm wide.
Capsule 8-ribbed; valves not caducous.
Tepals 2, filiform, 0.5 mm long.
