From the Victoria and Albert Museum, “Christopher Dresser (1834-1904) produced this diagram to illustrate the lectures on botany that he gave at the Government School of Design in London in the mid-1850s. It is one of several surviving examples that show how he taught botanical drawing. In this clear drawing the elements of the flowers are shown in a diagrammatic form, which helped Dresser to explain principles of biology.” Scan of 2 d images in the public domain believed to be free to use without restriction in the US.