Clematis ochroleuca Ait.
Of all the upright non viny species, Clematis ochroleuca has the broadest native range. Beginning with a piece of the southeastern New York state, the populations extend to parts of many eastern states to scattered areas in northern Georgia. It is interesting to note there are no recorded populations in Pennsylvania. The sepals are creamy yellow to pale purplish and solitary. The foliage has reticulate venation on the upper surface of the leaves. The leaf reverse is usually hairy.
Populations of this Clematis can be found in dry to moist woods, disturbed sites, open areas and roadsides. At Mt. Cuba Center in Delaware, it grows well at the base of mature trees, beneath a high canopy where it receives no supplemental watering.