Entandrophragma spp. of the family Meliaceae, the mahogany family, this wood is most often Entandrophragma angolense but may also include any of the follwing (and possibly more I am not aware of): Entandrophragma acuminata, Entandrophragma delevoyi, Entandrophragma dolicarpum, Entandrophragma ferrugineum, Entandrophragma leplaei, Entandrophragma rederi, and Entandrophragma rufa
This tropical African wood is a loosely mahogany-related (it's in the same family, but not any of the genera that contain the woods normally meant by the name "mahogany") and you can definitely see some similarities
my samples: NOTE: these pics were all taken in very bright incandescent lighting ("soft white" at 2700K) colors will vary under other lighting conditions
plank and end grain --- the lighter corner is sapwood which as you can see is easily distinguishable from the heartwood, but not sharply demarcated.