- A population of some 50-100 plants on almost flat land. Large perennial tuberous roots with nodules. Mostly small scrambling vines to 2 m. long; small leaves, some large; in flower and fruit, some dry pods; large purple flowers, one plant slightly reddish
- Published at: Sida, Botanical Miscellany 23: 88-91, f. 27, 31. 2002.