The anther in Peristylus plantagineus Lindl. was dithecous and tetrasporangiate. Its wall development conforms to the monocotyledonous type. Each archesporial cell developed into a block of sporogenous cells before organising into massulae. The anther was 4-layered. The endothecial cells developed ring like tangential thickening on the inner walls. Tapetal cells were uninucleate and of dual origin. The microspore tetrads were tetrahedral, decussate, linear and T-shaped. Pollen were shed at 2-celled stage.