Callitriche brachycarpa

Mostly terrestrial, creeping. Leaves obovate, 1.6–7 mm long, 0.7–5 mm wide, 3-veined, petiolate; upper leaves not rosetted. Flowers regularly paired, a male and female together in 1 axil; bracteoles usually absent, rarely linear and deciduous; stamen 0.5–2.5 mm long, filament often longer than ripe fruit; styles erect, 1–1.5 mm long, persistent. Fruit subcordate, 0.6–1 mm long, 0.8–1.3 mm wide, subsessile, not or slightly thickened at base, light brown; wing very narrow. Flowers and fruits Jan.–Feb. (2 records).