 From 1799 to 1801 he published twenty-four plates of "Fleurs Dessinees d'apres Nature" (Flowers Drawn from Life), which were high-quality engravings for students of floral painting.Today, Spaendonck's "Fleurs Dessinées d'après Nature" is a highly treasured book on floral art.In 1788 he was appointed adviser to the Académie, and in 1795 became a founding member of the Institut de France.