Calpurnia is a small genus of shrubs and trees from the family of Fabaceae – which is the family of many popular genera of flowering trees like Cassia, Wisteria, Robinia and Mimosa. Like its cousins, Calpurnia is known for its prolific flowering habit and ornamental foliage. Among popular species of this genus, the most commonly found is Calpurnia aurea. It grows as a small evergreen tree which is perfectly suitable for small gardens or as hardy street tree.
Calpurnia aurea is quite fast growing tree and starts flowering quite early. It can grow in almost any soil as far as it provides good drainage. It produces golden-yellow flowers that closely resemble the flowers of Laburnum, that is why Calpurnia aurea is commonly described as Wild Laburnum. It usually blooms in mid-summer and provides a long flowering season. Flowering is followed by fruition which is in the form of thin pods. These pods soon dry into dry and brownish texture. The tree is easy to prune and maintain and can be grown is a sunny or partially sunny spot. A healthy tree of Wild Laburnum can grow as tall as 12 feet.
Calpurnia aurea or Wild Laburnum is widely distributed across Pakistan, India, South Africa and parts of African continent. It is drought and frost tolerant and thus makes a good choice for gardens and landscapes.