Luck BeanAlso 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.