The Arboretum de Segrez is a historic arboretum

Arboretum

An arboretum in a narrow sense is a collection of trees only. Related collections include a fruticetum , and a viticetum, a collection of vines. More commonly, today, an arboretum is a botanical garden containing living collections of woody plants intended at least partly for scientific study...

 located within the Domaine de Segrez on Rue Alphonse Lavallée, Saint-Sulpice-de-Favières

Saint-Sulpice-de-Favières

Saint-Sulpice-de-Favières is a commune in the Essonne department in Île-de-France in northern France, located in the metropolitan area of Paris.Inhabitants of Saint-Sulpice-de-Favières are known as Saint-Sulpiciens.-Geography:...

, Essonne

Essonne

Essonne is a French department in the region of Île-de-France. It is named after the Essonne River.It was formed on 1 January 1968 when Seine-et-Oise was split into smaller departments.- History :...

, Île-de-France

Île-de-France (région)

Île-de-France is the wealthiest and most populated of the twenty-two administrative regions of France, composed mostly of the Paris metropolitan area....

, France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

.

The arboretum was established in 1857 as a scientific undertaking by Pierre Alphonse Martin Lavallée (1836-1884), a French botanist

Botany

Botany, plant science, or plant biology is a branch of biology that involves the scientific study of plant life. Traditionally, botany also included the study of fungi, algae and viruses...

 and horticulturist

Horticulture

Horticulture is the industry and science of plant cultivation including the process of preparing soil for the planting of seeds, tubers, or cuttings. Horticulturists work and conduct research in the disciplines of plant propagation and cultivation, crop production, plant breeding and genetic...

. It included a herbarium

Herbarium

In botany, a herbarium – sometimes known by the Anglicized term herbar – is a collection of preserved plant specimens. These specimens may be whole plants or plant parts: these will usually be in a dried form, mounted on a sheet, but depending upon the material may also be kept in...

and botanical library, and by 1875 was one of the largest collections of woody plants in the world. After Lavallée's death in 1884, scientific cultivation of the arboretum ceased, but a number of mature specimens can still be seen on the domain's grounds.