Indigofera cordifolia

About

Indigofera cordifolia, the heart-leaf indigo, is a species of flowering plant in the family Fabaceae. It is found from the Cape Verde Islands, across the Sahel to Oman, the Indian Subcontinent, Guangdong in China, and some of the islands of Indonesia, and it has been introduced to the Northern Territory of Australia. A glycophyte adapted to sandy soils, it is considered a weed in some situations, but can also improve crop yields due to its nitrogen-fixing ability.

Summary from Wikipedia