According to this paper, the seminal coats of Caesalpinia ferrea, C. pyramidalis, Senna martiana and S. spectabilis var. excelsa were composed of one layer of macrosclereids, coated by a cuticle and a subcuticle layer, followed by a layer of osteosclereids, sclerified parenchyma and another inner layer of osteosclereids. The impermeability of these seed seminal coats is probably restricted to the macrosclereids region.
Leguminosae; seeds; coat; impermeability