|Habitat||Shrubberies of Betula rotundifolia on a narrow valley bottom|
Cross-section round. Outline wavy. Culm center hollow. 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
Outline wavy. Upper epidermis cells in several rows. Epidermis with hairs. Vascular bundles near the lower side of the leaf. Girders extending from the vascular bundle to the lower side of the leaf. Large cavities.