Cross-section round. Outline smooth. Culm center hollow. No visual difference between epidermis cells and sclerenchyma cells. Continuous peripheral sclerenchymatic belt. Large vascular bundles in one row. Small vascular bundles integrated in the sclerench
Outline smooth. Upper and lower epidermis cells of equal size and shape. Vascular bundles near the upper side of the leaf. Girders extending from the vascular bundle to the lower side of the leaf.