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Erect or climbing perennial to 10 dm; stipules small, half-sagittate or ovate; lfls 4–9 pairs, ovate to ovate-oblong, entire, 1–2.5 cm; fls 2–6 in subsessile axillary clusters, blue-violet to white, 8–15 mm; cal distinctly irregular, the tube 4–5 mm, brown-villous, the lobes abruptly narrowed above a broadly triangular base into a slender tip, the lower half as long as the tube, the upper much shorter; fr 2–3.5 cm × 5–8 mm, 3–7-seeded, with smooth sutures; 2n=14. Native of Europe, intr. here and there in our range, especially northward.
A medium height herb. It keeps growing from year to year and can scramble 1 m high. It has branched tendrils. It is usually hairy. The leaves have 3-9 pairs of oval or oblong leaflets. They can be rounded or have a notch at the tip. The stipules are lobed and have a dark spot near the base. The flowers are purplish-blue. They are 12-15 mm long. The flowers occur in clusters of 2-6. The fruit is a black pod. It is 20-35 mm long and hairless.
