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Old World Diamond Flower is a summer annual broadleaf weed that is also known as Flat-top Mille Graines or simply Diamond Flower. Its scientific name is Hedyotis corymbosa.
This broadleaf weed can be identified as a smooth, spreading plant with branched stems and a weak, shallow taproot. Old World Diamond Flower has lanceolate leaves that grow opposite along the stems, which can grow close to the ground. Old World Diamond Flower produces small white flowers, usually forming in groups of two or more on long stalks from the tip of a long common stalk. Old World Diamond Flower blooms from mid-summer until frost, and reproduction occurs by seeds.
This broadleaf weed occurs in all moist turf and in most disturbed areas and is a common pest on golf courses. Old World Diamond Flower can be found throughout much of the American Southeast.
Proper cultural practices, such as proper mowing and watering, can help to prevent Hedyotis corymbosa by creating dense grass, which inhibits this broadleaf weed's ability to grow. Physical removal (i.e., pulling weeds) can be effective, though you run the risk of spreading the seeds to additional areas of your lawn and landscaping.
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