"Key and Guide to Native Trees, Shrubs, and Woody Vines of Dallas County" by Norma Stillwell is a scientific publication written in the late 1930s. This guide focuses on the identification of woody plants—including trees, shrubs, and vines—that are indigenous to Dallas County, Texas. It serves as an educational resource, providing insight into the characteristics and classification of about ninety species native to the area. The opening of this guide presents a preface outlining the book's purpose, which is to assist beginners of all ages in familiarizing themselves with the local flora. It explains the classification system used throughout the guide, emphasizing the importance of understanding the differences between trees, shrubs, and vines based on their size and growth forms. Additionally, the author discusses the practical use of the key for identifying these plants by focusing primarily on their leaves and twigs, providing readers with clear instructions on how to effectively utilize the guide in the field. (This is an automatically generated summary.)