If you like to name whatever you see growing this book will be most helpful. And speaking about naming plants, the January-February 2000 issue of Horticulture has a good article on pronouncing scientific names of plants. If you read it carefully it will give you useful guidelines. The list of common mispronunciations may surprise you and may make you change your ways. In a lifetime I do not think I have heard more than one or two botanists ever pronounce that plant name according to botanical Latin rules.
Common names vary so from region to region and country to country.
If you travel at all it will be helpful to know plants by their scientific names. Other publications are listed separately.