The name for this one might seem a bit odd but it does have a reason. 

I have a background stamp with written text that I occasionally use in my work and never really paid attention to the words until recently. 

A little while ago I started learning French.  So when I pulled the stamp out of my stash I was surprised when I recognized the words on the stamp as French and understood what they are saying!  They are all written numbers.  That's it.  Nothing fancy, just numbers.  How funny is that?

Anyhow, the point I'm getting to is that the main word that can be seen in the tree (lower right) says "cinquante" which means 50 in French.  Thus, the title for the work.