This is a prickly, scrambling perennial plant that can grow to 2.5m. The little leaves are heart shaped and occur in fours, squarely arranged along the stalk. The whole plant is rough to the touch. The flowers appear in axillary cymes (i.e. where the central flower in the inflorescence opens first and is then followed by the peripheral ones).
It is found in the thicket, West of the boat club.