Wild Flowers Worth Knowing Wild Flowers Worth Knowing is a book published in 1917 (and republished in 1922) as a result of an adaptation by Asa Don Dickinson of Neltje Blanchan's earlier work Nature's Garden (1900). It covers mostly North American species, with a sprinkling of cosmopolitans, and includes a preface by Blanchan (who died in 1918). The book, along with Birds Worth Knowing (also by Blanchan), and other books such as Animals Worth Knowing, was part of the Little Nature Library series published by Blanchan's husband Frank Nelson Doubleday. It contains over forty color illustrations accompanying the text, which is arranged by plant family under the classification system of Gray's New Manual of Botany as revised by Robinson and Fernald. ] This is in contrast to Blanchan's earlier work, where the flowers were organized by color. The text of the newer work was also somewhat simplified, and had fewer illustrations than the earlier one.