RHS Silver-Gilt Echinacea purpurea Posted on 30th May 2022 by Jarnie Echinacea purpurea is the third painting in my series of 6 Echinacea paintings. The series was held in exhibition with the RHS at the Saatchi Gallery in Chelsea, London in September 2021. Echinacea purpurea watercolour on paper 54 x 75cm