Though the term black bean can mean a variety of things including a range of beans, it can also refer to a type of tree found natively in Australia (Castanospermum australe), also called the Moreton Bay chestnut.
Bark and Height
The bark of the black bean is smooth and thin.
Black bean trees grow up to 130 feet tall in the wild, and 50 to 60 feet tall when cultivated.
The leaves of the black bean tree are pinnate (having leaves branching off a larger leaf stem like a feather) and are one to one and a half feet long. The leaflets are five inches long, dark green and glossy. They are poisonous.
The flowers of the black bean are 1.2 to 1.6 inches long, pea shaped, yellow to red colored and have long white stamens. They bloom in the middle of spring.
The fruit of the black bean are cylinder shaped pods that are five to eight inches long. They are brown when immature and black when mature. They contain three to five poisonous seeds that are 1.6 to 2.4 inches across, and ripen in autumn.
The black bean tree is native to eastern Australia, to beaches and rain forests, along river banks, stream banks and in terraces along the sides of mountains. It grows in moist and well drained soils and full sunlight. It is a drought resistant tree.
The wood of the black bean is used in making furniture. The nuts were eaten by natives after being specially readied.
The Free Dictionary: black bean
http://www.desert-tropicals.com/Plants/Fabaceae/Castanospermum_australe.html Moreton Bay Chestnut, Black Bean Tree
The Free Dictionary: pinnate