Murdannia
''Murdannia'' is a genus of annual or perennial monocotyledonous flowering plants in the family Commelinaceae. The genus is one of the largest in the family. They are most easily distinguished from other genera in the family by their three-lobed or spear-shaped antherodes (i.e. non-functional anthers). Also it is the only genus with staminodes (i.e. non-functional stamens) opposite the petals. ''Murdannia'' are found in tropical regions across the globe with extensions into warm temperate areas. Typically, ''Murdannia'' species are found in open areas in mesic habitat, mesic soils. However, some are semi-aquatic plant, aquatic, and a limited few are found in closed forest situations. Three species are naturalized in the United States (''Murdannia keisak, Murdannia nudiflora, M. nudiflora'' and ''Murdannia spirata, M. spirata'').
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