The Garden Under Glass

GLOSSARY 361 a larger pot or, failing this, the plant should receive some stimulant in the way of a Chemical fertiliser or liquid manure. A plant in such a state will need copious supplies of water. The term root-bound has precisely the same meaning. Prick off.—To prick off plants (the term is usually applied to seecllings) means to set them a few inches apart in a pan 01 box to induce a sturdier habit than would prevail if they weie left to grow in the seed-pan. I strongly ad vise pricking out early to give the plants plenty of chance to get away nicely and to obviate damping off, whicb is often induced by overcrowding in the seed-pan. Pseudo Bulb. — A false bulb. A term applied to the swollen stem or bulblike growth of orchids, such as calanthes, cattleyas, and cælogynes. Raffia.—A dried grass used for tying plants. It has now almost entirely superseded matting. It can be bought cheaply in bundles. When tying, the raffia should be twisted to strengthen it and to give a neat appearance. It may be split for tying when no great strength is required. Rapper.—A pot-rapper is used for testing pot plants befoie applying water. See page 232 for remarks and illustrations. Reef Knot.—This is best described as a square knot, where each loose ends stands out the same way as the corresponding part of the main portion of the tying material. It is a much better knot than the “ granny’s knot.” Retard.—To delay the growth, the flowering or.the fiuiting of a plant by removal to a cooler, airier and sometimes darkei place. Plants intended for forcing are often kept in a temperature below freezing point, but this is done by those who have special apparatus, and cannot be carried on to any considerable extent by private growers. Return.—-The return pipe in the heating apparatus is that which carries the water back to the bottom. of the boiler after the highest point has been reached. Valves are usually set on the return pipes to facilitate control, but they do not need t e same attention as those on the flow pipe.