I always reach out this time of year when the flowering Callery pear trees are in bloom so you can see just how invasive they have become along our streets and in our parks. As you drive and walk around this next week or two, pay attention to the white flowering trees along the highway and your favorite hiking trail. These are all invasive flowering Callery pear that have seeded themselves in and are outcompeting even invasive bush honeysuckle in many places. Make note of where they are so you can plan efforts on their control in this year’s work plan. Like invasive bush honeysuckle, they are much easier to remove when they are smaller and less established.
ODNR Division of Forestry – Page 12 http://forestry.ohiodnr.gov/portals/forestry/pdfs/invasives/InvasivePlantsofConcern.pdf
The Beginning of a New Invasive Plant: A History of the Ornamental Callery Pear in the United Stateshttp://bioscience.oxfordjournals.org/content/57/11/956.full
While you are at it, pay attention to the yellow flowers in many a lawn that looks like buttercups. This is the highly invasive lesser celandine. Lesser celandine has escaped cultivation and is becoming widespread in parks, yards, and forests growing under a range of environmental conditions including drier upland areas. Granted, they won’t kill your trees, but note where these patches are and it is likely places you have trouble with your turf later in the year. Here is an article on lesser celandine at: http://bygl.osu.edu/content/weed-lesser-celandine-ranunculus-ficaria-0
Wendi Van Buren
ODNR Urban Forester