Black Mondo Grass Seeds Ophiopogon nigrescens are an ornamental grass variety known for producing dark purple to black strap like foliage This plant develops clumping growth with narrow leaves that form dense ground level coverage during seasonal development The plants produce small pale flowers followed by decorative berries as they mature This ornamental grass variety is valued for its distinctive foliage color compact growth habit and uniform plant structure making it widely recognized as a decorative ground level plant variety