The UOG Herbarium was established to further the knowledge of the plants of Guam and other islands of Micronesia. A large collection of exemplars collected world-wide is devoted to teaching. The collections also serve as a reference tool for local and visiting scientists. Systematic research is published in technical papers and peer-reviewed publications for the wider scientific community. Herbarium staff provide expertise in botany for local needs, such as environmental impact assessments and conservation and management efforts via surveys and the assembling of inventories of protected areas.