During the 1970s Warhol turned towards still-life as a new subject matter, producing numerous works based on flowers, fruit and skulls. His portfolios of vases of flowers from 1974 mark an important progression in his work - the introduction of a visibly hand-drawn element. Yet, at the same time they look back to his commercial work of the 1950s. In the flower prints, the lively, hand-drawn line becomes the focal point as Warhol steps away from the photographic image. He then adapted these prints by creating hand-coloured versions, such as the one used on this poster. The inks would have been added by Warhol?s assistants. This recalls the colouring parties that Warhol hosted in the 1950s, where his friends would `colour in? his commercial designs.