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Perennial herb, 30-50 cm high. Stem ascending, much branched. Leaves more or less crowded, sessile, 4-7 cm long, 1-2 mm wide, oblong, tapering towards base, apex acute, nerves impressed above, prominent beneath, covered with patent bristles on both sides. Cymes terminal, branched, 10-15 cm long, with short glandular and longer normal hairs, without bracts. Calyx 4 mm long in flower, slightly accrescent, with 5 linear lobes free to near the base, hairs like inflorescence. Corolla hairy outside, tube yellow, slightly longer than calyx, hairy above anthers inside, limb explanate, dark purple from a pale base, 6-8 mm in diam., with 5 shallow lobes, plicate. Stamens 5, anthers nearly sessile, oblong. Pistil: style shorter than the stigma; stigma conical from an annulate base. Fruit breaking up into 2 two-loculate carpels, with membranous pericarp, glabrous, with 2 longitudinal grooves, 3 mm high.
Perennial herb, up to 0.5 m high, with annual or biennial stems from a woody rootstock. Stems procumbent or decumbent. Leaves sessile or petiolate; blade ovate to elliptic; petioles up to 15 mm long. Flowers in a helicoid cyme. Calyx lobes shorter than corolla. Corolla light mauve to dark purple, tube and throat orange-yellow; tube glandular-hairy on outside, hairy in throat; lobes shallow, crinkled. Flowering time Oct.-Mar. Fruit of glabrous, tuberculate nutlets.
Herb, up to 0.6 m high. Leaves hairy, lanceolate to elliptic. Corolla tube longer than calyx, glandular hairy outside, lobes rounded. Stigma sessile. Fruits ± invested by calyx, tips of carpels not divergent. Flowers mauve.
