I definitely suggest to include wood collections (xylaria) within the scope of the catalogue. Wood, as lignified plant, serves as quintessential materials used in most human history. The concept of wood collections fist appeared in the late 18th century, and large numbers of xylaria were established in the 1940s and 1950s. Institutional xylaria are listed in the Index Xylariorum, first published in 1967, and the most current edition is published online by International Wood Anatomists Association (IAWA) in 2016. It lists 158 institutional xylaria globally. A variety of national historical museums and herbaria also stores large number of wood collections, for example, Naturalis Biodiversity Center，Smithsonian Institution and Kew Garden. And large numbers of wood collections have been or being digitalized, databased and accessible online for public. Wood collections plays an important role in context of biodiversity and climate change, since tree rings could reveal and reflect the natural environment and climate in history. Reference wood collections are central to robust, scientifically sound forensic wood identification, which aims to combat illegal logging and associated trade to prevent biodiversity loss. The inclusion of wood collections in this list enrich the historical collections scientifically and technically.