Severn River Nature Reserve vegetation mapping was undertaken by Dr John T. Hunter in 2000 by contract for the NPWS Northern Tableland Region. The Clayton Chase additions to the Severn River Nature Reserve were mapped in 2005. Severn River Nature Reserve is located 50km north west of Glen Innes.

The vegetation of Severn River Nature Reserve is described and mapped (scale 1:50000). Nine communities are defined based on PATN analysis and two specialised communities are broadened in their circumscription based on previously surveyed sites. Nine communities are mapped based on ground truthing, air photo interpretation and altitude. Most communities are of a Woodland structure, however Forests exist along with Shrublands and Herbfields. The distribution of communities is related to Aspect and Physiography mainly but also past disturbances and soil depth. Many of the communities show considerable variation and intergrade along common boundaries. A number of specialised communities are thought to be largely restricted to the reserve and nearby areas. Six communities previously mapped within Severn River Nature Reserve by Hunter (2000) were found within Clayton Chase. Two additional communities were sampled and described for this area in 2005.

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