Clematis morefieldii is a rare species of flowering plant in the buttercup family known by the common names Morefield's leather flower and Huntsville vasevine. It is endemic to northern Alabama and southern Tennessee, where it is known from about 22 populations currently, most of which are small. Many of the populations are threatened, and some have been recently extirpated. It is a federally listed endangered species, listed in 1992.