This plant inventory published by the United States Department of Agriculture covers a variety of plants introduced to the United States from around the world. Issues 51-60 cover the period from July 1, 1915 to January 15, 1918 and provide detailed information on the origin, characteristics, and uses of each plant, making this a valuable reference for botanists and horticulturists. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.