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Leaves 1–4.5 cm. x 1–5 mm., lanceolate or linear-elliptic, tapering acute at the apex, narrowed at the base, the petiole obsolete, glabrous or scabrid on margins at extreme base; stipule sheath under 1 mm. long, scabrid, with 2 minute fimbriae.
Perennial herb, up to 500 mm tall. Leaves lanceolate, 1-7 mm wide, narrowed at base, narrowly attenuate to acute apex. Pedicels 2-7(-15) mm long. Corolla tube 25-35 mm long, lobes lanceolate. Flowers white, blue or pale mauve-pink.
Corolla white, blue or pale mauve-pink; tube 2.5–3.5 cm. long, very slender, slightly widened at apex, glabrous or slightly scabrid outside near throat, pubescent inside throat; lobes 5.5–7 x 1.5–2 mm., lanceolate.
Probably ± straggling herb at least 50 cm. tall, the upper stems quadrangular, minutely scabrid on the edges but otherwise glabrous; lower stems brown, woody, the bark peeling.
Calyx tube 2 x 1.5 mm., ellipsoid, glabrous or ± scabrid on the ribs; lobes 3.5 x 1 mm., lanceolate, sparsely scabrid on margins near base.
Flowers in lax corymbs; pedicels 2–7 mm. long, elongating up to 1.5 cm. in fruit but mostly about 6 mm., glabrous.
Anthers included; style papillate, shortly to distinctly exserted, the stigmatic lobes ± 2 mm. long.
Capsule ovoid, 5–2 x 4–5 mm. including the conical beak.
