I was completely mystified then this twisty plant showed up in the yard. It seems I had some store ginger that was starting to bold so I stuck it into the ground & promptly forgot about it. When I took the picture it was about 10 inches tall. the twisty bits are from the tip of one leach being captured in the bas of the leaf below. I don't know if they always do this or because I had stuck this in a part of the yard that didn't get too much water.