Latticeleaf

Lattice-leaf ( Ouvirandra fenestralis), a singular aquatic plant, growing in shallow water on the margins of running streams in Madagascar. The plant has fleshy farinaceous roots, which are used as food, and derives its popular name from the perforated condition of its oblong submerged leaves, which have hardly any mesophyll tissue within the meshes formed by the parallel longitudinal veins and the finer transverse ones. It belongs to the pondweed family (Juncaginaceae).