The Native North American small tree you referred to as the "Burning Bush Tree" is known hereabouts as "Wahoo." Thus the joke, Student: "Professor, what is that small tree?" Professor: "Wahoo. Wahoo, Wahoo, Wahoo." Student: "Yes, sir, I know you are enjoying the nice weather. But, what is the name of that small tree?" 8^D Well, it seemed funny out in the woods. :-/