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Pictured is kalmia in bloom at the Arnold Arboretum, a department of Harvard University.

Kalmia in Bloom at Arnold Arboretum

Pictured is kalmia in bloom at the Arnold Arboretum, a department of Harvard University.

A map of the Arnold Arboretum. The arboretum is located in Jamaica Plain, Massachusetts. It is a department of Harvard University.

Map of the Arnold Arboretum

A map of the Arnold Arboretum. The arboretum is located in Jamaica Plain, Massachusetts. It is a department…

Pictured is a tree still standing in the Humphrey Marshall collection of the Arnold Arboretum.

Still Standing Tree

Pictured is a tree still standing in the Humphrey Marshall collection of the Arnold Arboretum.