Also known as the black bean or Moreton Bay chestnut, the seedlings of lucky bean houseplants (Castanospermum australe) are often sold as novelties with the bean-shaped seed still attached. 

The bean eventually dries up, but the plant continues to be a delight with its tropical spring blossoms in bright hues of yellow and red. After blooming, large cylindrical brown seed pods form, each containing three to five bean-shaped seeds.