AIDGAP British water plants identification guide
The AIDGAP British water plants identification guide covers all the larger plants found in fresh water, including emergent plants.
The introductory key to groups quickly directs the user to subsequent keys to individual species. Intended for use with living specimens in the field, all of the identification keys use non-flowering features, enabling the non-specialist to recognise and name water plants throughout the year. The guide also includes line drawings of most of the plants covered.
Haslam, Sinker & Wolseley