Browallia speciosa is a blue-violet tender perennial usually grown as an annual flowering plant also called the amethyst flower or bush violet. It is much used as a garden ornamental.[1]
^RHS A-Z encyclopedia of garden plants, Editor-in-chief Christopher Brickell, pub. United Kingdom: Dorling Kindersley. 2008. ISBN1405332964, page 192
^Schultes, Richard Evans and Raffauf, Robert F. The Healing Forest - Medicinal and Toxic Plants of the Northwest Amazonia, pub. Dioscorides Press, Portland, Oregon (an imprint of Timber Press, Inc.) 1990 ISBN0-931146-14-3 pps. 418-19.