Seeds, under cover; or cuttings of young shoots may be made, and inserted in sandy soil under glass. =Leiophyllum= (Sand Myrtle). _Ericaceæ._ May be freely increased by seeds, sown in pans and placed in a frame. By layers in autumn. =Lemon= (_Citrus Limonum_). _Rutaceæ._ The named sorts are budded upon either orange or lemon stocks. Orange stocks are probably most generally preferred, as they are adapted to a great variety of soils, and vigorous trees nearly always result. The budding is performed in the same manner as upon the orange, which see. Lemons are often grown from cuttings of the mature wood, which are set in the open ground as soon as the spring becomes warm, or in a frame. Stocks for budding upon are sometimes grown from cuttings in this way. =Lentil= (_Ervum_, various species). _Leguminosæ._ Seeds, sown in early spring. =Leonotis= (Lion's Ear, Lion's Tail). _Labiatæ._ Seeds. Increased by cuttings, which root freely in a gentle bottom heat, in early spring. =Leontice.= _Berberideæ._ May be increased by seeds or by suckers. =Leontopodium= (Edelweiss, Lion's Foot). _Compositæ._ May annually be raised from seeds, or the old plants may be divided in spring. The seeds must be kept in a dry place throughout the winter. =Lepachys.= See Rudbeckia. =Leptosyne.= _Compositæ._ Propagated by seeds. =Leschenaultia.= _Goodenovieæ._ In spring or summer cuttings may be taken from the points of shoots that are rather firm, and placed in sandy peat, in a shaded frame. =Lessertia.= _Leguminosæ._ Propagation by seeds, or by divisions in spring. =Lettuce= (_Lactuca sativa_). _Compositæ._ Seeds, which may be sown under glass or in the open. In the middle and southern states, the seeds may be sown in the fall, and the plants protected during cold by a mulch; or the plants may grow during winter in the warmer parts. =Leucadendron= (Silver Tree). _Proteaceæ._ Propagated by seeds. =Leucoium= (Snowflake). _Amaryllideæ._ Seeds, for producing new sorts. Propagation is commonly effected by bulbels, which should be secured as soon as possible after the foliage ripens. =Leucothoë.= _Ericaceæ._ Increased by seeds, which should be covered very lightly. By divisions of established plants in autumn or winter. Also by layers. =Lewisia.= _Portulacaceæ._ Propagated by seeds, or by divisions in spring. =Leycesteria.= _Caprifoliaceæ._ May be increased by seeds, sown in spring. By cuttings of the short young shoots, made in spring; by older ones made in autumn. =Leyssera.= _Compositæ._ Increased by seeds, and by firm cuttings, placed in sandy soil during summer. =Liatris= (Blazing Star, Button Snake-Root). _Compositæ._ Seeds are usually sown early in autumn. Divisions may be made in spring. =Libonia.= _Acanthaceæ._