Perovskia atriplicifolia 'Blue Spire'

Perovskia atriplicifolia Benth. Lamiaceae Cultivar 'Blue Spire'. Russian sage. Herbaceous perennial. Distribution: Central Asia. Flowers eaten leaves smoked as a euphoriant. In Pakistan and Baluchistan, used to treat dysentery. The cultivar 'Blue Spire' is probably a hybrid with P. abrotanoides and has the RHS Award of Garden Merit. Photographed in the Medicinal Garden of the Royal College of Physicians, London.