Edited from NZ Flora to fit obs. Scrambling on cliff, stems glabrous, angled, broadly winged. Lvs glabrous; tendril branched in upper lvs, sometimes reduced and simple in lower lvs; leaflets in 1 pair, narrowly to broadly elliptic, acute, 20–70 mm long; veins parallel; stipules lanceolate, with 1 basal lobe, 15–30 mm long. Infl. somewhat>lvs, 1–3-flowered; pedicels 4–8 mm long. Calyx glabrous, somewhat gibbous (i.e. more mass on one side than the other) at base; calyx teeth unequal, narrowly to broadly triangular, < tube. Corollas purple and crimson, 20–35 mm long.