It is a woodcut portraying three native plants representing three transcontinental, native families, viz: Araceae, Orchidaceae, Iridaceae.The examples shown are an arum, a cypripedium and a blue-eyed grass.
When the remains of the stake was cleared, legend say that a purple flower (the "Bermudiana", a New World iris of the genus Sisyrinchium) was found in her ashes; before her death Sarah had declared that there would be a sign that she was guiltless and today the flower blooms about Bermuda.