Information

Shrub, up to 2.5 m tall, sometimes scandent; young stems 4-angular, glabrous except some hairs at the nodes. Leaf-blades ovate to elliptic, 1.5–7 x 1–4 cm, cuneate to rounded at the base, obtuse to acuminate at the apex, with entire to undulate margin, glabrous; petiole up to 5 mm long, usually with stipule-like spines at the base. Flowers solitary in leaf-axils; pedicels 1–5 cm long; bracteoles ovate, up to 3 x 1.5 cm, glabrous. Calyx with up to c. 12 linear unequal up to 10 mm long lobes. Corolla bluish-purple with yellow throat; tube 30–50 mm long; lobes 12–20 mm long. Stamens 2 long and 2 short; anthers oblique at base, with a spiny crest prolonged upwards in a row of soft hairs. Stigma 2-lobed. Capsule 25–32 x 11–19 mm.