Montia fontana subsp. amporitana Sennen

Montia rivularis C. C. Gmel. Fl. Bad. 1; 301. 1805.*
Montia fonlana repens Pers. Syn. PI. 1: 111. 1805.
Montia j on tan a rivularis Bonningh. Prod. Fl. Monast. 121. 1824.
Perennial, remaining green; stems branched, usually floating, 1-3 dm. long, the branches terminated by a tuft of leaves; leaves 1-2 cm. long, spatulate or oblanceolate, short-petioled; flowers mostly in 3-8-flowered axillary cymes; pedicels 5-15 mm. long; sepals reniform, scarcely 1.5 mm. long; capsule obovoid, about equaling the calyx; seeds black, shining, under a lens reticulately grooved, somewhat tubercled, but the tubercles low and merely convex.
Tvric locality: Baden, Germany.
Distribution: Greenland to Newfoundland and New Brunswick; also in western Europe.