Madeira Vine
Madeira Vine, or Mignonette Vine, a tropical American perennial sometimes grown as an ornamental plant. Its smooth stem, 10 to 25 feet (3 to 8 m) high, bears small oval or heart-shaped leaves. The small fragrant white flowers, which blacken with age, appear in showy spikes about one foot (30 cm) long. Tubercles (nodules) grow at the junctions of the stems and leaves. If planted in moist sand, these tubercles produce new plants.
The Madeira vine is Boussingaultia baselloides of the Madeira vine family, Basellaceae.