Edit - doing this too early in the morning and have just re-read the thread and seen that Seltzer used this one already... I'll get my coat and go and take another picture and do it properly this time...
X is for Xyloglyphy (I know I used this picture in the Y is for... but hey, it works here too, and I'm lazy) I have found another carved tree that I want to photo, so I will add that if I get it this weekend.
And, no, I'm not that clever... I cheated and found this page
http://phrontistery.info/x.html which has some good inspiration. I challenge us all to find pictures for the rest of the list. And a prize should be given to whoever manages "Xystarch".
Cheers
Tim