This book is recommended by Carmen Corridino of Caribbean Earth Skills. It has great photos of overall tree form as well as close-up photos of tree parts. Also lists some uses of each tree.
This book has everything from flowers to trees to weeds in it. It is the most comprehensive book on tropical medicinal plants that I have ever found. You have to know what to do with the plants, but this book will tell you what they are used for in many different cultures across the Pacific and Asia. Many of these plants are also found in the Caribbean and Central and South America. Submitted by Leslie Cole.
This one is more ethnobotanical, so it covers medicine and many different uses across Polynesia. It would also apply to other tropical regions around the world. It has 17 pages on the coconut alone. This type of thing is common knowledge to people who live in this area, but to those unfamiliar with tropical landscapes, it can be quite useful and save time learning everything the hard way. Submitted by Leslie Cole.