Button Island is a small island

Island

An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot , or holm...

 in the Hingham Bay

Hingham Bay

Hingham Bay is the easternmost of the three small bays of outer Boston Harbor, part of Massachusetts Bay and forming the western shoreline of the town of Hull and the northern shoreline of Hingham in the United States state of Massachusetts. It lies east of Quincy Bay and is met at the southwest by...

 area of the Boston Harbor Islands National Recreation Area

Boston Harbor Islands National Recreation Area

The Boston Harbor Islands National Recreation Area is a National Recreation Area situated among the islands of Boston Harbor of Boston, Massachusetts. The area is made up of a collection of islands, together with a former island and a peninsula, many of which are open for public recreation and some...

. The island has a permanent size of under 1 acres (4,046.9 m²), plus an intertidal zone

Intertidal zone

The intertidal zone is the area that is above water at low tide and under water at high tide . This area can include many different types of habitats, with many types of animals like starfish, sea urchins, and some species of coral...

 of a further 116 acre (0.46943576 km²). It is composed of a massing of glacial till which rises to a height of 10 feet (3 m) above sea level

Sea level

Mean sea level is a measure of the average height of the ocean's surface ; used as a standard in reckoning land elevation...

. The island is managed by the town of Hingham

Hingham, Massachusetts

Hingham is a town in northern Plymouth County on the South Shore of the U.S. state of Massachusetts and suburb in Greater Boston. The United States Census Bureau 2008 estimated population was 22,561...

, and access is by private boat only.

The island is notable for a large oak

Oak

An oak is a tree or shrub in the genus Quercus , of which about 600 species exist. "Oak" may also appear in the names of species in related genera, notably Lithocarpus...

 tree, which together with several smaller oaks, cedars

Cedar wood

Cedar wood comes from several different trees that grow in different parts of the world, and may have different uses.* California incense-cedar, from Calocedrus decurrens, is the primary type of wood used for making pencils...

, and sumac

Sumac

Sumac is any one of approximately 250 species of flowering plants in the genus Rhus and related genera, in the family Anacardiaceae. Sumacs grow in subtropical and temperate regions throughout the world, especially in Africa and North America....

 cover the island. Shrub species such as bayberry

Myrica

Myrica is a genus of about 35–50 species of small trees and shrubs in the family Myricaceae, order Fagales. The genus has a wide distribution, including Africa, Asia, Europe, North America and South America, and missing only from Australasia...

 and dewberry

Dewberry

The dewberries are a group of species in the genus Rubus, section Rubus, closely related to the blackberries. They are small trailing brambles with berries reminiscent of the raspberry, but are usually purple to black instead of red.Dewberries are common throughout most of the Northern Hemisphere,...

 can also be found. Grass

Grass

Grasses, or more technically graminoids, are monocotyledonous, usually herbaceous plants with narrow leaves growing from the base. They include the "true grasses", of the Poaceae family, as well as the sedges and the rushes . The true grasses include cereals, bamboo and the grasses of lawns ...

es and sea-lavender

Sea-lavender

Limonium is a genus of 120 flower species. Members are also known as Sea Lavender, Statice, or Marsh-rosemary. Limonium is in Plumbaginaceae, the plumbago or leadwort family. Despite their common names, species are not related to the lavenders or to rosemary.The genus has a subcosmopolitan...

populate the inter-tidal zone.