​”Caroli Clusii Atrebat” is a significant botanical work authored by Carolus Clusius, first published in 1526. This treatise, written in Latin, is a comprehensive account of rare and noteworthy plants observed in Spain. Clusius, a renowned Flemish botanist, meticulously documented his observations during his travels through the Iberian Peninsula, contributing to the scientific understanding of plant species in that region.​

The book is structured to provide detailed descriptions of various plant species, including their physical characteristics, habitats, and medicinal uses. Clusius’s approach combined empirical observation with classical botanical knowledge, reflecting the Renaissance era’s emphasis on blending tradition with new discoveries. His work not only cataloged the flora of Spain but also served as a valuable resource for contemporary and future botanists, offering insights into plant identification and classification.​

“Caroli Clusii Atrebat” stands out for its methodical presentation and the depth of information provided. Clusius’s attention to detail and his systematic approach to documenting plant species set a precedent for botanical literature. The book’s influence extended beyond its time, impacting the development of botanical studies and encouraging a more scientific approach to the study of plants.​

Carolus Clusius’s “Atrebat” is a foundational work in the field of botany. Its thorough documentation of Spain’s rare plants and its blend of empirical observation with classical knowledge exemplify the scholarly pursuits of the Renaissance. The treatise remains a testament to Clusius’s dedication to the study of plants and his contribution to the advancement of botanical science.