Planta pusilla, 3-pollicaris. Radix filiformis, simplex, alba, 1-2-pollicaris. Caulis a basi ramosus, pilosus, cylindricus, tenuis, herbaceus, sed rigidus, erectus. Folia alterna, per caules etramos totos satis frequentia, crecta, linearia, angusta, 2-3 lineas longa, vix semi-lineam lata,ad margines crassiora et subrevoluta, integra. Flores apice ramorum racemosi vel paniculati, numerosi, pedicellos filiformes 3-4-lineares, terminantes. Calyx profunde 5-fidus et fere 5-parlilus, pilosus, tubo hemisphoerico, parvo, pilis erectis tecto; lobis capillaribus, aeutis. Corolla infundibuliformis, apice 5-loba, tubo angusto, lobis calycinis dupld triplove longior. Capsula sphaerica, pilosa, lineam lata, lobis calycinis erectis terminata, et apice 3 valvis subacutis, lobiscalycinis dimidio brevioribus, debiscens.
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Slender, roughly hairy annual to 20 cm, branching from base. Leaves small, lanceolate, margins thickened. Flowers in rounded cymes, narrowly funnel-shaped and tubular below, hairy, white or blue with purple centre, 5-8 mm diam., ovary densely hairy, capsule with beak longer than wide.