Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Perovskia atriplicifolia 'Blue Spire'. Dr Henry Oakeley. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Perovskia atriplicifolia 'Blue Spire'. Dr Henry Oakeley. Source: Wellcome Collection.