Leeks are used principally in soups; they partake much of the nature of onions, but for this purpose are in general more esteemed. This plant has been so long cultivated in this country, that its native place is not known. The seeds are sown in the spring, and it is in use all the winter. 445. LETTUCE. Lactuca sativa.--The varieties of lettuce are many. They are, Green Coss. White do. Silesia do. Brown do. Egyptian do. Brown Dutch. White Cabbage. Imperial. Hammersmith Hardy. Tennis-ball. These are sown every summer month. The brown and Egyptian coss are sown in August, and commonly stand the winter; and in the spring are fit for use. 446. LOVE-APPLE. Solanum Lycopersicum.--The Portuguese and Spaniards are so very fond of this fruit, that there is not a soup or gravy but what this makes an ingredient in; and it is deemed cooling and nutritive. It is also called Tomatas, or Tomatoes. The green fruit makes a most excellent pickle with capsicums and other berries. It is annual, and raised in hot-bed, and planted out. 447. MARJORAM, WINTER. Origanum vulgare.--This is used as a sweet herb, and is a good appendage to the usual ingredients in stuffing, &c. It is a perennial plant, and propagated by planting out its roots in the spring of the year. 448. MARJORAM, SWEET. Origanum Marjorana.--This is also used for the same purpose as the last mentioned. It is an annual, and not of such easy culture as the last, requiring to be raised from seeds in an artificial heat. It is usually dried and kept for use. 449. MARYGOLD. Calendula officinalis.--An annual plant usually sown in the spring. The petals of the flowers are eaten in broths and soups, to which they impart a very pleasant flavour. 450. MUSHROOM. Agaricus campestris.--Is cultivated and well known at our tables for its fine taste and utility in sauces. These plants do not produce seeds that can be saved; they are therefore cultivated by collecting the spawn, which is found in old hot-beds and in meadow lands. Various methods have been lately devised for raising mushrooms artificially: but none seem to be equal to those raised in beds, as is described in all our books of gardening. Raising this vegetable in close rooms by fire heat has been found to produce them with a bad flavour; and they are not considered so wholesome as those grown in the open air, or when that element is admitted at times freely to the beds. 451. MUSTARD, WHITE. Sinapis alba.--This is sown early in the spring; to be eaten as salad with cress and other things of the like nature; it is of easy culture. A salad of this kind may be readily raised on a piece of thick woollen-cloth, if the seeds are strewed thereon and kept damp; a convenient mode practised at sea on long voyages. Cress and rap may be raised in the same manner. 452. ONION. Allium oleraceum.--The kinds of onions in cultivation are, The Deptford. The Reading. The White Spanish. The Portugal. The Globe, and The Silver skinned.