
Unripe Muscadine Fruit (Vitis rotundifolia)
This vine has been growing in my backyard for decades now, I'm sure. The fruit is usually ripe by mid-August to late-September, depending on conditions. I checked the vines this morning, and some fruits have already begun turning pink. They will be a dark purple to black when ripe.

''Vitis rotundifolia'', or muscadine, is a grapevine species native to the southeastern and south-central United States from Florida to Delaware, west to eastern Texas and Oklahoma. In a natural setting, muscadines are important plants for improving wildlife habitat by providing cover, browse, and fruit for a wide variety of animals.
