. Ornamental cacti : their culture and decorative value . sition. No wax is required, but it is best to closely wrap thegraft with raffia to exclude the air. The grafted plants are thenplaced in a warm, moderately moist place until the tissues havebecome thoroughly knitted together. They should not be placedwhere they might be subject to drying, for under such conditionsthe cut surface will be the first to dry, and consequently a perfectunion will be prevented. With small globose or thick plants, such as Mamillaria (PL II),Echinocactus, Echinocereus, etc., a different method is
. Ornamental cacti : their culture and decorative value . sition. No wax is required, but it is best to closely wrap thegraft with raffia to exclude the air. The grafted plants are thenplaced in a warm, moderately moist place until the tissues havebecome thoroughly knitted together. They should not be placedwhere they might be subject to drying, for under such conditionsthe cut surface will be the first to dry, and consequently a perfectunion will be prevented. With small globose or thick plants, such as Mamillaria (PL II),Echinocactus, Echinocereus, etc., a different method is head of the plant is cut away with a perfectly smooth trans-verse cut. (PL III.) A stock is selected which has about thesame diameter as the scion, and it is also given a smooth transversecut. The two flat surfaces are then pressed firmly together andheld in place by tying them together with a cotton or other softcord. It is quite essential that clean instruments be used to prevent Bui. 262, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate Mamillaria Cornifera, Missouri Botanical Garden, St. Louis, 1899. 262, Bureau of Plant Industry , U. S. Dept. of Agricultur Plate
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