Green Bulrush (Scirpus atrovirens), 4000 Certified Pure Live Seed, True Native Seed FREE SHIPPING Number of seed is Pure Live Seed, not bulk Species is US Native, not introduced alien We grow the seed so we control quality A 3 to 5 tall native perennial member of the sedge family. A summer flowering species with compound clusters of tiny flowers and requiring moist to wet soils and full sun sites.