An indispensable index that shaped botanical scholarship across borders. A working reference, beautifully rendered. International Catalogue Of Scientific Literature - Fourth Annual Issue (M Botany) gathers the era's botanical publications into a disciplined scientific literature catalogue: a botany reference guide and academic bibliography collection designed to help readers navigate the expanding corpus of plant science research. It functions as a botanical compendium and botanical studies index that organises international scientific works and provides a scientific taxonomy resource for those tracing names, descriptions and comparative studies. Practical enough as a scholar research tool and solid enough for a university library reference, it bridges the demands of rigorous research and the curiosity of general readers who want to understand how early 20th century science organised knowledge. Its systematic arrangement and cross-referencing make it straightforward to locate sources across languages and regions, allowing researchers to reconstruct scholarly conversations with confidence. For taxonomists and historians alike, it supplies context often absent from modern summaries; for casual browsers, it is an archival window into the methods and networks that produced botanical knowledge. Historically significant, this annual issue records a pivotal moment when global exchange of botanical data accelerated and standards of classification matured; its pages reveal the methods and networks that underpinned later advances in biology. Republished by Alpha Editions in a careful modern edition, this volume preserves the spirit of the original while making it effortless to enjoy today - a heritage title prepared for readers and collectors alike. Casual readers will find a vivid, archival window into past inquiry; classic-literature collectors and institutional libraries will prize it as a lasting biology research anthology and a thoughtful addition to any botanical reference shelf. Maintaining the original vocabulary and citation practice, it offers students and curators a primary-period perspective that complements modern databases and aids provenance research. Whether consulted for a single citation or studied as a snapshot of early botanical scholarship, it rewards both quick reference and sustained study.