Barbara M. Thiers discusses the importance of herbaria in documenting plant life and the need for strengthening partnerships to ensure their future. Herbaria, which have existed for over 500 years, are critical for biodiversity research and conservation. Despite digitization efforts that have increased the accessibility of herbarium specimens, challenges remain, including the lack of information on many herbaria, consolidation, and relocation to offsite storage. The author emphasizes the need for herbaria to act as a global resource rather than isolated institutions. By collaborating, herbaria can enhance their reach and contribute to conservation efforts. The concept of a "One Herbarium" is proposed, where herbaria work together as a single global resource, sharing data and specimens to improve research and conservation. This approach could also help address issues of equity in plant diversity science, as many herbaria in the Global South have limited access to specimens. The author also highlights the importance of partnerships with other biological collections to create an extended specimen network, which would integrate data from herbaria with other biological and environmental data sources. This would enable a more comprehensive understanding of biodiversity and its changes over time. The article also discusses the need for herbaria to actively participate in conservation research and policy, moving beyond passive data providers to active research partners. The author concludes that herbaria have the potential to model a 21st-century biological collections community that embraces FAIR principles and achieves equity in partnerships.Barbara M. Thiers discusses the importance of herbaria in documenting plant life and the need for strengthening partnerships to ensure their future. Herbaria, which have existed for over 500 years, are critical for biodiversity research and conservation. Despite digitization efforts that have increased the accessibility of herbarium specimens, challenges remain, including the lack of information on many herbaria, consolidation, and relocation to offsite storage. The author emphasizes the need for herbaria to act as a global resource rather than isolated institutions. By collaborating, herbaria can enhance their reach and contribute to conservation efforts. The concept of a "One Herbarium" is proposed, where herbaria work together as a single global resource, sharing data and specimens to improve research and conservation. This approach could also help address issues of equity in plant diversity science, as many herbaria in the Global South have limited access to specimens. The author also highlights the importance of partnerships with other biological collections to create an extended specimen network, which would integrate data from herbaria with other biological and environmental data sources. This would enable a more comprehensive understanding of biodiversity and its changes over time. The article also discusses the need for herbaria to actively participate in conservation research and policy, moving beyond passive data providers to active research partners. The author concludes that herbaria have the potential to model a 21st-century biological collections community that embraces FAIR principles and achieves equity in partnerships.