Black Rubber Plant with Medium Self Watering Pot - BYOBFicus Elastica, more commonly known as the Black Rubber Plant, belongs to the Moraceae family. It has dark green glossy leaves with a leathery look. The plant is also known as Black Prince as the leaves appear black when looked at from a distance. The Black Rubber Plant has air purifying and toxin absorbing abilities. The leaves form an awe inspiring foliage that can amplify the look of your home and office.