Torilis arvensis, also known by its common names ‘Hedge Parsley’ or ‘Spreading Parsley’ is an invasive flowering plant that grows in a variety of conditions, but is especially found within disturbed sites. Hedge Parsley prefers full sun, mesic to dry conditions, and often grows in soil containing limestone gravel. It matures quickly during the growing season, produces flowers and seeds, and then dies.

Much like Stickseed, Hedge Parsley also relies on “hitchhiking” to disperse its seeds and spread its growth. The white flowers produce small hook-like seeds on the pods that they grow. The hooks attach themselves and travel with people and animals to other destinations until they fall or are pulled off. Because of this, Hedge Parsley will germinate readily and can become weedy, sometimes overtaking lawns and flower beds.

Though Hedge Parsley is invasive, it is not considered to be too harmful to the native plant communities or toxic to livestock. However, it can be a real nuisance because it can outgrow a lot of other plants. The burs, or seeds, can also cause mechanical injury to livestock or pets if they lodge in ears, eyes, or nose. Because the seeds are tiny and sticky, they are incredibly difficult to remove from clothing and fur.

For these reasons, we are asking volunteers to focus on removing Hedge Parsley from the park. In the map below, you’ll be able to find where we have identified Hedge Parsley to be most abundant. 

If you are interested in helping out, please sign up on our GivePulse page, and don’t forget to log your hours afterward!