Slender, glabrous, shrubby climber, eventually forming a dense mound on surrounding vegetation to 1.5 m high and 1 m wide; new shoots minutely ciliate, but rapidly glabrescent. Leaves clustering by different sizes at nodes, linear, to 20–40 mm long, 1–2 (–5) mm wide, wider in intermediate stage foliage, margin incurving but not canaliculate, abaxial surface paler, ± with hairs (erect, short-based (2-cell) hairs with an elongated top cell), glabrescent; apex mucronate; base tapering to a petiole 1–2 mm long, articulate with branchlet. Inflorescences single, bisexual, irregular blue flowers nodding on slender peduncles to 30 mm long, subtended by a leaf-like bract. Sepals triangular, 2–3 mm long, margins incurving and sinuate towards the apex. Petals more rectangular than obovate, 10–17 mm long, 6–8 mm mm wide, inky blue, paler on the abaxial surface. Stamens with free anthers grouped together to face petal break, dehiscing through apical pores; filaments about the same length as anthers, thin, flat, wider at the base, purple-blue; anthers straw-or pale-yellow not gold, 3–4 mm long, oblong; pollen yellow. Pistil fusiform, purple-green, ovary twice the length of the hooked style; stigma bifid. Fruit septicidally dehiscent, fusiform, chartaceaous, to 20 mm long, numerous seeds inserted mainly around the middle of the chamber on simple peg-like funicles. Seeds numerous, flattened, angular reniform, c. 1 mm long; not arillate.
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