Seed micromorphology of S. tarokoense and two related species. A &B, S. nokoense (from W. S. Tang 1827); C &D, S. tarokoense (from H. W. Lin 1003); E &F, S. uniflorum subsp. oryzifolium (from H. W. Lin 912). Dashed lines show cell boundaries. A, C &E, bar = 100 μm; B, D &F, bar = 10 μm.