Propagated by seeds, or by cuttings of half-ripened wood in sandy loam in August, and shaded until rooted. Also by budding on _Aucuba Japonica_ at the crown. Plant sufficiently deep to cover the bud or graft. =Gasteria.= See Aloe. =Gaultheria= (Boyberry, Wintergreen). _Ericaceæ._ Increased by seeds, divisions, layers and cuttings under glass. =Gaura.= _Onagrarieæ._ Seeds should be sown in spring or fall in the open ground. =Gaylussacia.= See Vaccinium. =Gazania=, Mœhnia, Mussinia. _Compositæ._ Increased by seeds and divisions. Make cuttings in July or August, from the side shoots near the base of the plant; these should be placed in a sandy soil, in a frame. =Gelsemium=, Leptopteris, Medicia. _Loganiaceæ._ Propagated by cuttings under glass. =Genista.= See Cytisus. =Gentiana= (Gentian). _Gentianeæ._ Seeds and division. The seeds germinate slowly, and often with difficulty. They often lie dormant a year or more. They should be sown in well-sifted light loam, in pans or flats, and kept cool and shaded. Division must be carefully done, or the plants will suffer. =Geonoma.= _Palmæ._ Increased by seeds and suckers. =Geranium.= _Geraniaceæ._ Mostly by seeds and divisions. For the conservatory plants known as geraniums, see Pelargonium. =Gerardia.= _Scrophularineæ._ Propagated, but often with difficulty, by seeds, sown in the open air or in a frame or cool house. =Gesnera.= _Gesneraceæ._ Seeds, and cuttings of the shoots and leaves. Handled in essentially the same manner as Gloxinia, which see. =Gethyllis.= _Amaryllideæ._ They may be increased by bulbels or seeds. =Geum=, including Sieversia (Avens). _Rosaceæ._ =Gherkin.= See Cucumber. Propagation is effected by seeds or division. =Gilia=, including Fenzlia. _Polemoniaceæ._ Seeds should be sown in spring in the open ground or frame, in a rather light soil. =Gilibertia.= _Araliaceæ._ Cuttings, inserted in sand in a gentle heat. =Gillenia.= _Rosaceæ._ Increased readily by dividing the roots in spring; also by seeds. =Gilliesia.= _Liliaceæ._ Propagated by bulbels. =Gilliflower.= See Matthiola. =Ginkgo=, Salisburia (Maidenhair-tree). _Coniferæ._ Seeds, which are mostly imported, and which should be stratified. Also by layers, and by cuttings of either green or ripe wood. The cuttings are handled under glass. Named varieties are grafted upon common stocks. =Ginseng.= See Aralia. =Gladiolus.= _Irideæ._