E-Flora BC: Electronic Atlas of the Flora of British Columbia

General:
Perennial or sometimes biennial, amphibious herb from a shallow creeping rhizome, smooth throughout or thinly glandular-hairy in the inflorescence; stems decumbent to erect, 10-70 cm long/tall, rooting at the lower nodes, simple to much-branched at the base, somewhat fleshy.

Leaves:
Opposite, mostly unstalked, somewhat clasping-based, elliptic to broadly lanceolate, 2-8 (10) cm long, 1.5-3 times as long as wide, usually distinctly but remotely toothed.

Flowers:
Inflorescences several long, rather narrow, opposite, stalked racemes arising from the axils of upper leaves, the racemes of to 30 or more stalked flowers, the flower stalks upcurved, 3-8 mm long, as long as or slightly longer than the reduced linear-lanceolate bracts; corollas blue to pale violet with darker lines, saucer-shaped, 5-10 mm across, irregularly 4-lobed, the lobes much longer than the short tube, the lowest lobe narrower than the others; calyces 3-6 mm long, deeply 4-lobed, the lobes unequal, broadly lanceolate; styles 1.5-3 mm long, exserted; stamens 2.

Fruits:
Capsules, 2.5-4 mm long, a little longer than wide, plump, somewhat globe-shaped, scarcely notched at the tip; seeds numerous, flattened, 0.3-0.5 mm long.