Button Island is a small island in the Hingham Bay area of the Boston Harbor Islands National Recreation Area. The island has a permanent size of under 1-acre, plus an intertidal zone of a further 116 acres. It is composed of a massing of glacial till which rises to a height of 10 feet (3.0 m) above sea level. The island is managed by the town of Hingham, and access is by private boat only. The island is notable for a large oak tree, which together with several smaller oaks, cedars, and sumac cover the island. Shrub species such as bayberry and dewberry can also be found. Grasses and sea-lavender populate the inter-tidal zone.  Source: Wikipedia-Button Island

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