Increased by seeds sown in spring, in pots of sandy soil, and placed in a cold-frame; by division, separate pieces being planted as cuttings under hand-glasses.
Arnatto. See [Bixa].
Arnebia. Boragineæ.
Increased by seeds. Cuttings of the strong shoots should be inserted in pots of sandy soil, and placed in gentle heat.
Arnica. Compositæ.
Propagated by seeds sown in a cold-frame in spring, and by divisions, which should be made in spring.
Aronicum. See [Doronicum].
Arracacha. Umbelliferæ.
Increased by divisions of the roots.