The Wild Flowers of the British Isles offers a detailed description of every wild flower found in Britain and Ireland. Over 1,400 species are clearly illustrated in colour for easy identification.
The first section of this book is 215 pages of stunningly illustrated flowers with no text beyond the common and latin name for each plant. Text descriptions are saved for the latter third of the book and aren't very detailed, just giving the distribution, habitat and a few key identifying features, though even then not for every species.
It's not very useful as an identification guide due to its age, the separation of the illustration and text, lack of close-up / cross-section drawings of key identification features, and short descriptions, but it is certainly a stunning book just for the first section alone and one of my favourites to leaf through. There's something quite lovely about page after page of bedstraws, umbellifers, etc. with no interrupting text.