In 2011 while walking to the top of Great Blue Hill in Canton, Massachusetts, the first author found a small tree approximately 2–3 m tall. The leaves of the tree were alternate with doubly serrate margins, somewhat reminiscent of beech or birch but not matching either genus. The bark of the tree displayed prominent lenticels. The tree could not be identified using any of the floras of the region. While conducting research in Harvard's Arnold Arboretum, the first author noticed that the tree on Great Blue Hill morphologically matched planted specimens of Sorbus alnifolia (Siebold & Zucc.) K. Koch and also fit the description of the species in Dirr (2009). Eight years later, on November 1, 2019, the Great Blue Hill site was revisited, the tree was found still extant and healthy, a specimen was collected, and a twig...

You do not currently have access to this content.