. Cyclopedia of American horticulture : comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening; Horticulture; Horticulture; Horticulture. 934. The bud long since determined what general and practical re- sults are to be expected from grafting. The limits within which grafting can succeed are to be determined only by experiment. These limits are often within the species, and usually within the genus, but
. Cyclopedia of American horticulture : comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening; Horticulture; Horticulture; Horticulture. 934. The bud long since determined what general and practical re- sults are to be expected from grafting. The limits within which grafting can succeed are to be determined only by experiment. These limits are often within the species, and usually within the genus, but there are instances in which plants of distinct genera intergraft with success, as in some of the cacti. But generic and graftage limits are not compar- able: genera are only arbitrary divisions proposed for purposes of classification, and intergrafting, like inter- crossing, has no necessary relation to these conceptions. In general, the closer the afllnity of cion and stock, the better the union. When stock of the same species can- not be secured, it is allowable to choose another species. Thus it has been impossible to secure Japanese plum stocks upon which to grow the varieties of Japanese plums, and peach, Marianna, myrobalan and domestica plum stocks have been used. In some cases another species grows more readily from seed, is cheaper, is less liable to fungous injury in the nursery, or has some other practical advantage. Thus, most domestica plums (Prunus domestica) in the North are worked on the myrobalan (P. cerasifern ); most sweet and sour cherries Prunus Avium and P. Cerasus) are worked on the Mahaleb {P. Mahaleb); many kinds of roses are worked on manetti and Bosa multiflora stocks. From time to time there arises an agitation against grafting, particularly in the Old World. Cases of poor unions and the difliculties of sprouting from the root or stock are cited as proofs that graftage is and devitalizing. But these poor graftage. They show what should no
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