Matt Griffing/National Park Service

Jack Alexander, the Arnold Arboretum’s plant propagator, took cuttings of a clone derived from the Olmsted elm for repotting.

Kayana Szymczak for the Boston Globe

Rhose Island School of Design Professor Daniel Cavicchi showed students the stump of the ancient oak tree that was cut down last year.

National Park Service

The Olmsted elm, in a view from before 2010.

Kayana Szymczak for the Boston Globe

Samantha Anderson examined and took notes at the stump of the ancient oak tree.

Kayana Szymczak for the Boston Globe

Andrea Parikh, Tina Xu, Adam Lowe, Samantha Anderson, Jonah Willcox-Healey, and Mikyung Park examined the stump.

Matt Griffing/National Park Service

Jack Alexander took cuttings from a clone derived from the Olmsted Elm.

Kayana Szymczak for the Boston Globe

Hilary Wang, Samantha Anderson, Jonah Willcox-Healey, and Mikyung Park visited the Frederick Law Olmsted National Historic Site.