What is a weed? How do I get rid of weeds? These are two of the questions gardeners agonize over. I own a wonderful book, Weeds of the Northeast by Uva, Neal and DiTomasso, that offers a page of extensive information of about 160 weeds, and a facing page of photographs showing those weeds in their various stages of development and flower form from baby seedling to seed at the end of the season. I use this book…