|Habitat||Perennial. meadow, hill zone.|
Culm-diameter 1-2 mm, wall large, radius of culm in relation to wall thickness approximately 1: 0.5. Otline triangular, acutely. Culm-center hollow and surrounded by many large thin-walled, not lignified cells. Center with net-like aerenchyma (stellate).
Rhizome diameter 0.5-0.99 mm, Rhizome center full, containing unlignified cells. Without cortex/central cylinder separation. Endodermis absent. Cells in the cortex round. Vascular bundles in central cylinde dispersed arranged. Vascular bundles concentric,