Increased by divisions; or by cuttings under glass in spring. =Amherstia.= _Leguminosæ._ Propagated by seeds; also by cuttings of the half-ripened wood inserted in sand under a glass, in bottom heat of about 80°. =Amianthemum.= See Zygadenus. =Amicia.= _Leguminosæ._ Propagated by cuttings, which will root in sand under a hand-glass, in heat. =Ammodendron.= _Leguminosæ._ Increased by seeds and layers. =Ammyrsine.= See Leiophyllum. =Amomophyllum.= Spathiphyllum. =Amorpha= (Bastard Indigo). _Leguminosæ._ Increased by seeds, usually. Layers or cuttings, taken off at the joint, strike readily if placed in a sheltered situation early in autumn. They should remain undisturbed till the following autumn. =Amorphophallus.= _Aroideæ._ Propagated by offsets, or cormels, and by seeds, which, however, are usually sparingly produced in cultivation. =Ampelopsis=, Quinaria. _Ampelideæ._ Increased by seeds, especially the one known as _A. Veitchii_. Layers or cuttings made in spring from the young soft wood, root freely in gentle heat. By cuttings having a good eye, if taken in September and pricked under hand-lights in sandy soil on the open border, or in pots. Hard wood cuttings are commonly employed in this country for _A. quinquefolia_. =Amphicarpæa.= _Leguminosæ._ Propagated by seeds, which should be sown in the open border, in spring, in a sunny place. =Amphicome.= _Bignoniaceæ._ Increased by seeds, sown in early spring, in pots of sandy soil placed in a greenhouse. By young shoots inserted in sandy soil in gentle heat in spring. =Amphilophium=, Amphilobium. _Bignoniaceæ._ Increased by cuttings from young shoots, which root readily in sand, under a hand-glass, with bottom heat, during the spring months. =Amsonia.= _Apocynaceæ._ Propagated by seeds; by divisions of the roots in spring; or by cuttings during the summer months. =Amygdalus.= See Prunus. =Amyris.= _Burseraceæ._ Increased by cuttings, which root readily in sand, under a hand-glass with bottom heat, during the spring months. =Anacampseros.= _Portulacaceæ._ Increased by seeds; by cuttings and leaves, taken off close to the plant. These should be laid to dry a few days before planting. =Anacardium= (Cashew). _Anacardiaceæ._ Ripened cuttings, with their leaves left on, root freely in sand under a hand-glass, in heat. =Anagallis= (Pimpernel). _Primulaceæ._ The annuals, by seeds sown in a warm place in spring; the perennials, by cuttings from young shoots, or by division, at any time, either under a hand-glass or in a closed frame. Keep in the shade, and when thoroughly established harden off gradually. =Anagyris.= _Leguminosæ._ Increased by cuttings, which should be planted in July in a pot of sand, and placed under a hand-glass.