General description and special characteristics – A climbing perennial with large pale blue flowers that produce 15-20 cm (6-8 in) winged pods at maturity. It can be planted as an annual or perennial.
Variety -
- Day-Neutral - Blooms during longer days, allowing out of season production.
- Pang Daeng Nawk – Short day-length variety from northern Thailand, produces long, tender pods (30 cm/12 in).