|Habitat||Annual, 20-60 cm tall, solitary, erect culm, dry habitats at lower altitude|
Culm-diameter 0.5-1 mm, wall very large, radius of culm in relation to wall thickness approximately 1:0.75. Outline circular, with rips. Culm-center hollow and surrounded by a few thin-walled, not lignified cells. Epidermis-cells thick-walled all around.