The balsams have a sweet, aromatic, resinous scent with an odour resembling vanilla or benzoin. Resinoids are extracts of resinous plant exudates (balsams, oleo gum resins, and natural oleoresins). Some balsams, such as Balsam of Peru, may be associated with allergies. Gummo-oleoresins (oleo-gum resins, gum resins) occur mostly as crude balsams and contain also water-soluble gums. Synthetic resins have largely replaced organic balsams for such applications. Some authors require balsams to contain benzoic or cinnamic acid or their esters. Prominent summits in the cross ridges include Waterrock Knob () in the Plott Balsams. Hydrocera is a genus of flowering plants in the family Balsaminaceae (balsams). Dixville is the location of Dixville Notch State Park and The Balsams Grand Resort Hotel. It is obtained from oil of cinnamon, or from balsams such as storax. Naturally occurring oleoresins are also known as balsams. He renamed it "The Balsams", and over time enlarged and augmented the facilities. In Cherokee, the name means "the place of the balsams" and refers to high ground. The balsams substitute for opobalsamum which some believe to be Stacte. The Balsams Grand Resort Hotel was built in neighboring Dixville Notch in 1874.