Two years ago I found a bean on a beach in Mauritius. About 2 cm long and dark brown. I brought it home and planted it. The plant that came up grew to about 80 cm in a couple of months, then stopped growing. Last spring it lost all its leaves, then started growing again, and it is now over 2 meters high. The leaves turn towards the sun and at night they hang down. If anybody can help me identify it I would be very grateful.
