Cross-section triangular. Outline wavy. Culm center with net-like parenchyma cells (aerenchyma). Recognizable epidermis cells. Peripheral sclerenchymatic stabilisation structure (girders) conic. Large vascular bundles in one row. Vascular bundles integrat
Outline wavy. Upper epidermis cells in one row. Epdermis lignified. Vascular bundles near the lower side of the leaf. Girders extending from the vascular bundle to both sides of the leaf.