Callitriche antarctica Engelm. ex Hegelm.

Monoecious herb, palustral or ± terrestrial on wet ground. Stems thick, creeping below with ascending branches to 10 cm high. Lvs spathulate, thick, 2.5-10 × 1.5-4.8 mm, entire, 3-nerved, sometimes with free veins; base scarious and connate. Fls solitary, ♂ in upper axils, ♀ in lower, ebracteate or bracts falling early. Filaments to 1.3 cm long, tapering from broad base. Style 1.4-3.2 mm long, persistent. Fr. 0.8-1.1 × 1.1-1.5 mm, not keeled or winged; faces slightly convex; commissural groove open and shallow.

A cool temperate plant. It grows in running water and wet land.

The leaves have been eaten to avoid scurvy.