Of the wild-flower books I own, including "The Encyclopedia of Wild Flowers," and the "Collins Gem Wild Flowers," Neil Fletcher's Pocket Nature Wild Flowers is certainly the simplest and clearest to use. I do have one complaint, however, and it is with the index, which I find inconsistent, incomplete, and in some respects, useless. For example, many flowers, such as "Buttercup" and "Thistle," just to mention a couple, are not even listed as such in the index. To find them there, you would need to know their full names, such as "Creeping Buttercup," "Spear Thistle," "Creeping Thistle," or "Marsh Thistle." For me, as a beginner in learning about wild flowers, a good index would show all varieties under "Thistle." Other flowers, such as the "Daisy," are not listed except under their Latin names. For me a good index is an important aspect of a reference book, and this one certainly leaves much to be desired.