The fruits of the South European lemon-tree, not to be confounded with citrons, resemble the latter in appearance, but they are smaller, have a more acid taste and a thinner rind. The peel contains an essential oil which is very similar in odor to that of the citron. Hence the oils of lemon, limetta (from Citrus Limetta), and citron are used for the same purposes; but when the three oils are immediately compared, an experienced olfactory organ perceives a marked difference between them. LEMON GRASS. _Latin_—Andropogon citrates; _French_—Schoenanthe; _German_—Citronengrass. This grass, which bears a close resemblance to citronella, is largely cultivated, especially in India and Ceylon, for the essential oil it contains. The odor of the grass is similar to that of verbena, so that its oil is often used as an adulterant or rather as a substitute for the former. (Compare the article on “Citronella.”) LILAC. _Latin_—Flores Syringæ; _French_—Lilas; _German_—Fliederblüthen. This plant, Syringa vulgaris, a native of Persia but fully acclimated in Europe and in this country, has very fragrant flowers, the odor of which can be obtained only from the fresh blossoms. A recently discovered liquid principle, now known as terpineol (C_{10}H_{17}OH), which exists in many essential oils, and in these, in the portion boiling between 420° and 424° F., possesses the lilac odor in a most pronounced degree, and to its presence in the lilac flowers the peculiar odor of the latter is, no doubt, due. It is obtainable in the market under the name lilacine. The Syringa of the florists is not the true lilac, but the same as the Mock Orange, viz., Philadelphus coronarius. LILY. _Latin_—Lilium candidum; _French_—Lis; _German_—Lilienblüthen. The remarks made under the head of Wallflower apply equally to the blossoms of the white garden lily: strange to say, they are not used in perfumery, and all the so-called odors of lily are mixtures of several aromatic substances. The author has succeeded in separating from the flowers, by means of petroleum ether, the delightful odor present in large amount in the blossoms of this plant, and has employed it in the manufacture of magnificent perfumes. MACE. _Latin_—Macis; _French_—Macis; _German_—Muscatblüthe.