Picking Up the Pawpaws: The Rare Woody Plants of Ontario Program at the University of Guelph Arboretum

摘要

It might surprise you to learn that, in Canada, species such as Magnolia acuminata (cucumbertree), Betula lenta (sweet birch), and Morus rubra (red mulberry) are among those that are listed as endangered in the wild (see Table 1). You may be thinking, “Really, Betula lenta? It grows all over the place in the eastern United States!” It’s true that the majority of woody plant species at risk in Canada are quite secure in the United States, so why the concern? Is there really a need for conservation?