In this watercolour illustration, Cartwright captures the delicate structural integrity of the peony. The medium allows for a nuanced exploration of light as it passes through thin botanical tissues, creating a sense of depth through gradual washes and fine, observational linework. By focusing on the organic geometry of the bloom, the artist highlights the intricate patterns found within nature's own design.

The horizontal composition emphasizes the expansive reach of the flower's head, grounding the specimen against the paper with a focused clarity. There is a rhythmic quality to the way the petals curl and overlap, reflecting a disciplined commitment to the traditions of botanical art where every vein and fold serves as a testament to the living subject.