That's the Invisible Plant! They are rarely if ever seen. You wouldn't know it from looking at it, but it requires lots of direct sunlight but not too much water. If you do everything right, it slowly becomes visible after 20 years. Be sure to post a photo for us after it becomes visible. Of course, then it it is not longer an Invisible Plant but something else entirely. At that time, I'm sure we will be able to ID it for you.
