Originally Posted by davepav

it is self seeded ,rooted in brickwork.It has hard thorns up the stem if the picture is enlarged .soft thorns can be seen running up the under side centre of the leaf.Ihave never seen anything like this plant and ive searched archives from kew and various other sites,i found nothing closely resembling this plant, can anyone advise me what it is where it comes from and if it is poisonous .heres hoping dave