This book considered the biological, ecological, toxicology, and chemical aspects of research topics as they relate to endophytes of grasses. Several chapters reflect the very pragmatic applications of endophytes and endophyte-infected grasses. Other chapters offer future applications for endophytes and are therefore discussed from theoretical viewpoints. This book contains the collective writings of an international group of experts on fungal endophytes of grasses, all of whom are directed toward, understanding, creating, and exploiting the positive aspects of endophytes. With this book, we are attempting to stimulate and facilitate future explorations of the grass endophytes.