The Garden Under Glass

350 THE GARDEN UNDER GLASS same purpose is formed by making a mound over the rim composed of clay and cow manure. That part of the stem of a plant immediately above the surface soil is called the collar. The term is chiefly used in reference to melons, which are very apt to rot off at this point. This may largely be prevented by mounding a little soil round it to throw off the water and by putting a sprinkling of lime at that point. Condensation.—A condensation channel is a groove formed on each side of the sash-bars forming the roof of the green-house for the purpose of carryingto the bottom, and eventually outside into the gutter, the moisture which condenses on the inner surface of the glass of a hothouse. If this were not thus carried away it would form itself into drops of water and fall on to the plants, probably damaging them. Corm.—The swollen part of a plant beneath the surface somewhat resembling a bulb, but without any apparent scales as a true bulb has. The crocus and the cyclamen give us examples of corms. Crock.—A piece of broken flower pot. To crock a pot is to put pieces of broken pots in it to form drainage. Crown.—Plants which have thick root Stocks containing buds have often the root stock called the crown. A familiar example is the spiræa. The crown bud of a Chrysanthemum is that which appears after the break bud, or the first that appears after the plants have been pinched. They usually appear in August. If they appear too early they are pinched out, and the next bud that appears is called the second crown bud. Cutback.—It is the practice of some growers to cut back to a few inches of their base all Chrysanthemums about the time of moving them to their flowering pots at the end of May. The growths are then allowed to grow straight along without furt her pinching. Such plants are called “ cutbacks.” Damp down.—To sprinkle water over the floor and other open surfaces of a fruit house for the purpose of promoting a