Macrotyloma uniflorum, commonly known as horse gram, is a legume native to tropical southern Asia. The plant grows from a rhizome, sending up annual shoots to a height of 60 cm (24 in). The flowers are cream, yellow or pale green and are followed by short pods. The seeds, pictured here, have been consumed in India for at least 4,000 years and are used both for animal feed and human consumption, including Ayurvedic cuisine. In other tropical countries in southeastern Asia, and in northern Australia, the plant is grown mainly as a fodder crop and for use as green manure. It is a drought-tolerant plant, largely cultivated in areas with low rainfall.Photograph credit: Prathyush Thomas