What is the definition of arboretum?

Last night for Family Home Evening we went to the UofI Arboretum. As we were walking along, Stephen asked, "What is the definition of arboretum?" James and I didn't know exactly, so I told him that arbor means tree and James told him that it is like a tree museum. Today, I had to look it up. This is the actual definition: "a place where trees, shrubs, and herbaceous plants are cultivated for scientific and educational purposes." We weren't too far off. My main goal in going there was to take pictures of the kids, and I did get a couple of good ones. However I totally forgot that I should take pictures of Noah so I don't have any of him. I'll probably just end up using one I took of him at the park. And somehow I didn't pay any attention to what Ellen looked like. Her shirt was on inside out and was dirty. Her hair was going crazy. And to top it all off, she just couldn't hold still! No matter what James and I said or did. I'll just have to keep trying with her. I'm pretty happy with what I got for Stephen, Anne, and Naomi. While we were there I noticed they had also planted some different varieties of sage brush. I had to go look at it and smell it. I never, ever thought I would miss sage brush, but living where there is none at all has actually made me feel a little excited every time I do see it. The little sign posted next to the sage brush made me laugh a little though. I don't really know why the Big was included.