During the selection process, click on the image that closest resembles your sample. Be sure to view all of the possible choices, and read the accompanying text. When you have narrowed your choices down to one tree, it is possible to click on both the image, and also the highlighted name of your tree in the right hand column.
If you make an incorrect choice, use your browser's 'back' button.
From any page in this site, it is possible to return to the HOME page by clicking on the tree image in the upper left hand corner.