Inflorescense terminal, leaves hollow and septate-nodulose, seeds without caudate tips, flowers in dense spherical heads, radiating in all directions, capsules equalling sepals, perianth 5+mm long. 6 stamens. Sepals longer than petals (last image)
Habitat: swale between two small lakeshore dunes
Used iNaturalist for ID
0.5m tall
herbaceous
leaves alternate and simple
no flower
fruit is 6-10 inch long dry seed head
leaves lighter on one side than the other
Perennial grass that grows 2-4' tall with alternate leaves at the base. The leaf at the base is flat and is rolled inward halfway to the tip. The inner surface is a shade of light blue and the outside is green. The culm terminates into a spike/panicle.
Sandy disturbed substrate
Thick patches scattered
Located within interdune