Cross-section round. Outline wavy. Culm center with net-like parenchyma cells (aerenchyma). No visual difference between epidermis cells and sclerenchyma cells. Continuous peripheral sclerenchymatic belt. Large vascular bundles in one row. Small vascular
Outline with rips. Upper epidermis cells in one row. Vascular bundles near the upper side of the leaf. Girders extending from the vascular bundle to the lower side of the leaf.