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Noun1.drop-seed - a grass of the genus Sporobolusdrop-seed - a grass of the genus Sporobolus  
grass - narrow-leaved green herbage: grown as lawns; used as pasture for grazing animals; cut and dried as hay
genus Sporobolus, Sporobolus - cosmopolitan annual and perennial grasses (as dropseed or rush grass)
blackseed, carpet grass, smut grass, Sporobolus poiretii - grass native to West Indies but common in southern United States having tufted wiry stems often infested with a dark fungus
sand dropseed, Sporobolus cryptandrus - erect smooth grass of sandy places in eastern North America
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References in periodicals archive ?
Remove lawn from banks and slopes where there is irrigation runoff, and replant with drought-tolerant ornamental grasses or perennials such as prairie drop-seed (Sporobolus heterolepis) and Russian sage (Perovskia).