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Stems: aerial stem to 40 cm. long, sparsely branched, densely short, white, patent hirsute above to glabrescent below; submerged stem up to 20 cm. long, sparsely branched, glabrous, usually sterile.
Flowers either sessile in axils of leaf-like bracts or in slender, distantly flowered spikes; bracteoles two, about 2 mm. long, linear, sub-acute, densely pilose.
Calyx 2.5–3 mm. long, densely pilose and with round yellowish glands, not striate at maturity; lobes about 1.25 mm. long, ovate-lanceolate, acuminate, divergent.
Corolla 3–4 mm. long, tube pale pink to white, limb white; totally glabrous; abaxial lip trilobed, lobes entire, adaxial lip erect, entire.
Stamens with posterior filaments about 0.4 mm. long, anterior 1 mm. long, glabrous.
Capsule about 2 mm. long, broadly ovoid, pale brown.
Erect or semi-aquatic herb 1-2 ft. high
Semi-aquatic annual.
Flower white.
Viscid hairs
