Genus Coeloglossum, also known as the Northern bog orchid, is a group of plant species that belongs to the family Orchidaceae. These orchids are native to the northern hemisphere, particularly in wetlands, bogs, fens, and shallow pools. Common synonyms for this genus are Coeloglossum brachylobum, Coeloglossum palustre, and Coeloglossum viride. These synonyms refer to species that have similar characteristics and are sometimes grouped together under the same genus. The Northern bog orchid is distinct because of its green or yellow-green flowers that bloom in dense clusters on a tall stem. Despite its presence in wet habitats, the Northern bog orchid is a threatened species due to habitat loss and degradation.