| The International Plant Names Index |
IPNI is a joint project with the Royal Botanic Gardens, Kew and the Australian National Herbaria to provide an online database of the names and associated basic bibliographical details of all vascular plants. |
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| Botanists |
Authors of plant names, collectors of botanical specimens, and authors of botanical publications. |
| Publications |
Titles and abbreviations of botanical publications with authors, dates of publication and BPH and TL2 references. |
| Specimens |
Specimen records, primarily type specimens from the Harvard University Herbaria and New England Botanical Club. |