|Habitat||Low river terrace; vegetation dominated by Artemisia frigida|
Cross-section round. Outline smooth. 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 ligni
Outline wavy. Upper epidermis cells in several rows. Epdermis lignified. Vascular bundles near the lower side of the leaf. Girders extending from the vascular bundle to the lower side of the leaf.