http://www.patiogardenponds.com/ If you are a naturalist looking for a tree field guide then Trees Minnesota Field Guide will be the perfect product for you; this is a field guide which is prepared by Stan Tekiela. Now you can make tree identification in Minnesota simple and more fun with this field guide; Trees Minnesota Field Guide features 93 species of trees, this book gives you the details you need to learn about the trees which are found in Minnesota.