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 2-3 rows. Solitary large vascular bundles. Chlorenchyma abs
Outline smooth. Upper epidermis cells in one row. Epidermis with papillae. Vascular bundles near the upper side of the leaf. Girders extending from the vascular bundle to both sides of the leaf.