Index Kewensis: The Legacy of Botanical Nomenclature
The quest to organize the vast diversity of the plant kingdom required more than just observation; it required a rigorous system of record-keeping. The Index Kewensis emerged as a monumental effort to catalog the names and authorities of flowering plants, providing a foundation for botanical research that would last for over a century.
The Origins of the Index
The project was born from a practical necessity. Joseph Dalton Hooker, based at Kew, directed the venture, while the actual preparation was carried out by Benjamin Daydon Jackson of the Linnaean Society. The impetus for the work came from Charles Darwin, who had personally struggled with the difficulties of applying consistent names to the plants he studied.
Funding for this ambitious indexing project was secured through Darwin's will. Upon his death in 1882, he stipulated a provision of £250 per annum for a period of five years to ensure the work could be completed.
Scope and Methodology
The primary objective was the compilation of an index covering the names and authorities of all known flowering plants and their countries of origin. To maintain a consistent starting point, the editors began with the year 1753, marking the publication of Linnaeus's Species Plantarum.
Unlike previous attempts at comprehensive indices that relied on secondary sources, the Index Kewensis was the first to strive for the original publication details of plant names. While the editors used the publications of De Candolle, Pfeiffer, and Bentham as models for name acceptance, the editor acknowledged that not all early sources were included, which occasionally led to errors in botanical nomenclature—the formal system of naming species.
[ไม่มีภาพประกอบ]Evolution of the Project
As the project progressed, its scope shifted to remain manageable. The editor eventually determined that including a full synonymy (a list of all names applied to a particular taxon) was too ambitious. Furthermore, the nature of the work evolved; while it initially acted as a nomenclator—a tool that indicates which name is accepted—by 1913, it shifted toward a pure index, avoiding taxonomic judgements in its citations.
Key Facts
- Funding: Provided by Charles Darwin's will (£250/year for 5 years).
- Leadership: Directed by Joseph Dalton Hooker and prepared by Benjamin Daydon Jackson.
- Timeline: Started from the 1753 publication of Species Plantarum.
- Innovation: First index to prioritize original publication details over secondary sources.
- Duration: Remained the most comprehensive botanical index for over 100 years.
Summary of the Index Kewensis Project
| Feature | Detail |
|---|---|
| Primary Goal | Index names, authorities, and countries of flowering plants |
| Starting Reference | 1753 (Linnaeus's Species Plantarum) |
| Key Contributors | Darwin (Funding), Hooker (Direction), Jackson (Preparation) |
| Shift in Approach | Moved from taxonomic judgement to objective indexing by 1913 |
Scientific Impact and Legacy
Despite some criticism that the work only represented the "Kew view" on nomenclatural validity, its objective approach to indexing earned it widespread international acceptance. F.O. Bower later described the work as a "technical benefit" to future generations of scientists, noting that it smoothed the path for every systematist who followed.
Ultimately, the Index Kewensis stands as both a scientific monument and a testament to the friendship and collaboration between Charles Darwin and Joseph Dalton Hooker.
Frequently Asked Questions
Who funded the creation of the Index Kewensis?
The project was funded by Charles Darwin, who left a provision in his will for £250 per year over a five-year period following his death in 1882.
What was the starting point for the plant names used in the index?
The index used 1753 as its starting point, coinciding with the publication year of Linnaeus's Species Plantarum.
How did this index differ from previous botanical indices?
Previous attempts relied on secondary sources, whereas the Index Kewensis was the first to attempt to provide the original publication details for plant names.
Did the Index Kewensis always make taxonomic judgements?
No. While it originally functioned as a nomenclator to indicate accepted names, by 1913 it avoided making taxonomic judgements and focused on objective indexing.
Why was the scope of the project changed during its production?
The editor realized that attempting to include a full synonymy for all plants was too ambitious a task to achieve.