Tall Coreopsis (Coreopsis tripteris), 200 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 4 to 8 tall native perennial tall grass prairie indicator species with 2 wide yellow flowers. It flowers in late summer and grows best in dry to medium soils and in full sun.