Ageratum, Cælestina. Compositæ.
Sow the seeds in January, in heat, in sandy soil. When large enough, prick them off into thumb pots, and keep in heat till they grow freely, then place them in a cooler house. Cuttings are commonly used for propagation.
Aglaia. Meliaceæ.
Propagated by cuttings ripened at the base, and taken off at a joint. They will root in sand under a hand-glass in heat.
Agrimonia. Rosaceæ.
Propagated by root-division.
Agrostemma (Rose Campion). Caryophylleæ.
Propagated by seeds and by division.
Agrostis (Bent Grass). Gramineæ.
Increased easily by seeds, sown in spring in the open border.