
Photos by
cottonmanifesto. Location: the Winsor School, Boston.
Urban species #274: Boston ivy
Parthenocissus tricuspidataThere are many buildings in Boston (and across the river, Cambridge) that are ivy covered, some of them famously. For a while now I have suspected that much of it is not "true" ivy (
Helix spp., to be dealt with in a future post) but some other plant. My main pieces of evidence included the fact that the Boston ivy's leaves change colors in fall, and drop before winter. True ivy is evergreen. Also, I read the assertion that true ivy (a European native) feeds no birds with its fruit. Boston ivy used to cover the building I live in, and I would watch
mockingbirds perch on my windowsill and eat its blue berries. As I finally learned today, the Boston ivy is in fact, a plant called "Boston ivy."
It is a relative of grape and
Virginia creeper, and also goes by the common name "Japanese creeper." This name may be more appropriate, since Boston ivy is actually native to Asia. The plant does have a genuine connection to my city, however, as one of the varieties discovered and cultivated at the Arnold Arboretum goes by the name "Fenway Park." Chicago's baseball park, Wrigley Field, also has Boston ivy growing on its walls. In fact, the main use of this plant is to cover masonry on large buildings like stadiums and schools, and in at least one case, a parking garage. I'll leave it to readers in New Haven, Providence, Ithaca, Hanover, Philadelphia, and Princeton to check to see if the rest of the League is covered by ivy, or Boston ivy.
( Read more... )Thanks to
interfecta from the
urban_nature community for the identification!