The dictionary contains about 30,000 vernacular and literary English names of plants (plus a few American), both wild and cultivated, with their botanical name and a brief account of the names' meaning if known. It was conceived as part of the author's wider interest in plant and tree lore, and ethnobotanical studies.

Knowledge of plant names can give insight into largely forgotten beliefs. Why for example is, or was, the common red poppy known as "Blind Man"? An old superstition has it that if the poppy were put to the eyes it would cause blindness. Such names were probably the...