Japan Flora: Delicate gla­brous annual; leaves radical, tufted, broadly linear to narrowly oblong, 4-10 mm. long, 1-3 mm. wide, 2-5 cm. long including the petiole; stolons short nodeless, with a tuft of leaves at the top; pedicels 4-20 mm. long, ascending, appressed to the ground in fruit; flowers white to pinkish, about 2.5 mm. lobes broadly ovate; capsules 2-lobed, ellipsoidal, about 3 mm. long; seeds elliptic, about 0.3 mm. long, somewhat reticulate.  May-Oct. Muddy or sandy places around springs and along rivers;

Hokkaido, Honshu, Kyushu; very rare. Cooler regions of the N. Hemisphere.