The Texas lined snake (Tropidoclonion lineatum texanum ) is a subspecies of nonvenomous snake in the subfamily Natricinae of the family Colubridae. The subspecies is endemic to the United States.
T. l. texanum is typically olive green to dark brown in color, with a distinctive yellow or cream-colored stripe down the center of the back. It has a small head and small eyes. It differs from other subspecies of T. lineatum by having fewer subcaudals: 33 or fewer in females, 40 or fewer in males.