Cross-section round. Outline smooth. Culm center filled. Epidermis with papillae. Continuous peripheral sclerenchymatic belt. Large vascular bundles in one row. Small vascular bundles integrated in the sclerenchymatic belt. Solitary large vascular bundles
Outline wavy. Upper epidermis cells in one row. Vascular bundles centered between the upper and lower side of the leaf. Girders extending from the vascular bundle to both sides of the leaf.