. Plant propagation : greenhouse and nursery practice . Plant propagation. 148 PLANT TKOPAGATIOX orders, 890 genera and 4,200 species listed in Gray's Field, Forest and Garden Botany, 110 orders, 650 genera and 3,000 species come under this ruling and (theoretically) may be grafted, while the balance, the endogens which lack the cambium sheath (oat, bamboo, palm) cannot be grafted. With experimental exceptions (Chapter XII) this is so. Among exogens botanical relationship seems in most cases to be fundamental to success in graftage which is usually easy between varieties of the same species (a
. Plant propagation : greenhouse and nursery practice . Plant propagation. 148 PLANT TKOPAGATIOX orders, 890 genera and 4,200 species listed in Gray's Field, Forest and Garden Botany, 110 orders, 650 genera and 3,000 species come under this ruling and (theoretically) may be grafted, while the balance, the endogens which lack the cambium sheath (oat, bamboo, palm) cannot be grafted. With experimental exceptions (Chapter XII) this is so. Among exogens botanical relationship seems in most cases to be fundamental to success in graftage which is usually easy between varieties of the same species (apple. FIG. 132—GREATLY MAGNIFIED SECTION THROUGH YOUNG GRAFT, Round mass of scar tissue near center merely accidental. Upon apple) and often between closely related species (pear upon quince, or plum upon peach). Sometimes species more remotely related than the genus will prove successful; for instance, apple or pear {Fyrus) upon thorn (CratccgHs). But rarely, and then mostly experi- mentally, can distantly related species be grafted suc- cessfully ; probably not at all from a business standpoint. A few instances may emphasize these points. While pear is commercially grafted upon quince to form dwarf trees, apple is seldom or never so treated, and quince. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kains, M. G. (Maurice Grenville), 1868-1946. New York : Orange Judd Company
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