This user-friendly, original key provides an easy route to the accurate naming of flowers, trees, grasses, sedges, rushes and ferns in the British Isles. No expert botanical knowledge is expected, and with a little practice the key can quickly be mastered. This handy book is not a descriptive flora, but is intended for students of all levels, and for all who like to know the names of flowers but are discouraged by more sophisticated, wordy floras. The key has its origins in courses run by the author where a simple field key was required. Subsequent testing through the Aids to Identification in Difficult Groups of Animals and Plants organisation (AIDGAP) further refined the key as a working tool for field and bench use. In this revised edition, the plant names have been brought in line with those used in Stace's New Flora of the British Isles.