Species is US Native, not introduced alien 1 PLS Pound of Mix 133 (Retention Basin Mix) Designed for 5,445 Square Feet of Planting A Retention Basin Mix containing 12 species of native grasses and sedges and 14 species of native wildflowers. Flowering period and flower colors are coordinated for full season variety. The number of seeds in a pound of each species is used to calculate the amount of seed of each species that is needed in this mix. Mix 133 (Retention Basin Mix) is designed for the environmental conditions of the Southern Tier States and for sites with mesic to wet soils. Flowering period and flower colors are coordinated for full season variety. The amount of seed of each species in the mix has been calculated using the number of seeds per pound of each species factored by establishment parameters. Mix 133 contains the following 12 native grass and sedge species and 14 native wildflower species: Virginia Wild Rye, Fowl Manna Grass, Bushy Bluestem, Switchgrass, Nodding Sedge, Shallow Sedge, Blunt Broom Sedge, Fox Sedge, Soft Rush, Path Rush, Green Bulrush, Wool Grass, Smooth Beardtongue, Ohio Spiderwort, Blue Flag, Mistflower, Seed Box, Wild Senna, Monkey Flower, Blue Vervain, Swamp Milkweed, Sneezeweed, Showy Tickseed, Iron Weed, Joe-Pye Weed, and Yellow Wingstem.