Leaves are compound with 4 to 7 leaflet pairs and a branched tendril at the tip. Leaflets are oval to oblong-elliptic, rounded at both ends, and can also be finely hairy or nearly smooth.

A pair of narrow leafy appendages (stipules) attend the leaves at the axil, the upper portion longer than the lower and pointed at both ends, generally shaped like half of an arrowhead. Stems are distinctly 4-angled, finely hairy to smooth, with multiple stems arising from rhizomatous root system.