... little study of the roots of trees is practicable, some knowledge of their forms, varieties, and parts is important. The great office of the roots of all plants is the taking in of food from ... the radish, are stocks of food prepared for the future growth of the plant, or for the production of flowers and fruit. The thick roots of trees are designed mainly for their secure fastening ... authorities of the Arnold Arboretum, Boston, Massachusetts, and of the Missouri Botanical Garden, St. Louis, for information in regard to the hardiness of species; to Mr. John H. Redfield, of the...