Cross-section semi-round. Outline wavy. Culm center filled. Recognizable epidermis cells. Continuous peripheral sclerenchymatic belt. Large vascular bundles in one row. Solitary large vascular bundles. Sclerenchymatic sheath around vascular bundles not li
Outline with rips. Upper epidermis cells in one row. Vascular bundles near the lower side of the leaf. Vascular bundles surrounded by cells with atypical shape. Girders extending from the vascular bundle to both sides of the leaf.