Another thank you in the direction of Bart Wursten (aka zimbart@Flickr) for sharing some of his photographs from Africa, this time from Zimbabwe (image 1 | image 2 | via the Botany Photo of the Day Flickr Pool). Always appreciated, Bart!
This species is native to continental southeast Africa, where it is found in open burned grasslands. Even though it is listed as a species of least concern by the Red List of South African Plants (and therefore fairly common), it is apparently uncommon to see Pachycarpus concolor in flower (why? because apparently the antelope eat them). The one common name I've been able to track down for this species is ishongwe.