These men are Malis, or gardeners, and are a part of the Shudras. Within the caste of Shudra there are many different groups. Each one of these groups performs a service. Their specific service is a birthright and is somewhat similar to unions in the U.S. Unless the Shudra is a Mali, no other Shudra is allowed to be a gardner. In this photo, two members of the Mali caste are mowing the lawn with the help of a bullock.