Tuberous vetchling - Lathyrus tuberosus

"Lathyrus tuberosus", also known as the tuberous pea, tuberous vetchling, earthnut pea, or aardaker, is a small, climbing perennial plant, native in moist temperate parts of Europe and Western Asia. The plant is a trailer or weak climber, supported by tendrils, growing to 1.2 m tall.