Torilis japonica, Japanese Hedgeparsley

Gardens & Landscapes, Invasive Species October 05, 2012 Print Friendly and PDF

Invasive Species: Torilis japonica, Japanese Hedgeparsley

Japanese hedgeparsley is a biennial herb that grows 2-4 ft. (0.6-1.2 m) tall when flowering. First-year rosettes are low, parsley-like, and green into fall. The stem leaves are alternate, fern-like, 2-5 in. (5.1-12.7 cm) long, and slightly hairy. Flowers are tiny, white, 5-petaled, and clustered in small, flat-topped umbels. Flowering occurs from June to September. The fruit are small, cylindrical, and covered with hooked hairs that attach to clothing or fur. Japanese hedgeparsley threatens woodlands and savannas. Spreading hedge parsley (T. arvensis) is very similar and invasive.

What are invasive species and why should we be concerned about them? 


Taxonomy: Scientific and Common Names for This Species

Apiales > Apiaceae > Torilis japonica (Houtt.) DC.

Torilis japonica - USDA PLANTS Profile

Distribution Maps

Japanese hedgeparsley - The reported distribution of this invasive species across the United States (Source: Invasive Plant Atlas of the United States)

Up-to-the-minute distribution maps and why they are important 

Reporting This Invasive Species

What is the best way and place to report the occurrence of an invasive species? 

 How to report an invasive species sighting to EDDMapS - Early Detection & Distribution Mapping System

EDDMapS - Report an Invasive Species to EDDMapS.

Cooperative Extension Offices - Find your local Cooperative Extension office on this map provided by USDA.

How to Identify

This invasive species can be identified by looking for the characteristics described in the paragraphs that follow.

Plant

Japanese hedgeparsley is a biennial herb that grows 2-4 ft. (0.6-1.2 m) tall when flowering.

Dan Tenaglia, Missouriplants.com, bugwood.org Dan Tenaglia, Missouriplants.com, bugwood.org

Foliage

First-year rosettes are low, parsley-like, and green into fall. The stem leaves are alternate, fern-like, 2-5 in. (5.1-12.7 cm) long, and slightly hairy.

Dan Tenaglia, Missouriplants.com, bugwood.org Dan Tenaglia, Missouriplants.com, bugwood.org

Flower

Flowers are tiny, white, 5-petaled, and clustered in small, flat-topped umbels. Flowering occurs from June to September.

Dan Tenaglia, Missouriplants.com, bugwood.org Dan Tenaglia, Missouriplants.com, bugwood.org

Fruit

The fruit are small, cylindrical, and covered with hooked hairs that attach to clothing or fur.

Dan Tenaglia, Missouriplants.com, bugwood.org Dan Tenaglia, Missouriplants.com, bugwood.org

Native Species That Can Resemble Japanese Hedgeparsley

- Images at invasive.org

   
bugwood.org bugwood.org

- Images at invasive.org

   
bugwood.org bugwood.org

Additional Images for Japanese Hedgeparsley

Japanese hedgeparsley - Images at Invasive.org

Learning Resources for Japanese Hedgeparsley

Video: Identification of Invasive Species - University of Wisconsin-Cooperative Extension Service

Additional Information, Biology, Control and Management Resources

Control and management recommendations vary according to individual circumstances. Location, habitat, weather, and a variety of other conditions are factors that help determine the best treatment choice. To find the safest and most effective treatment for your situation, consult your state's land-grant institution. If you will use chemicals as part of the control process, always refer to the product label.

United States Land-Grant University System - Find your land-grant university's college of agriculture, Cooperative Extension office, or other related partner on this map provided by USDA.

Invasive Plants of the United States - Invasive.org

Robert W. Freckmann Herbarium - University of Wisconsin - Stevens Point

Invasive Plants of Wisconsin - University of Wisconsin - Green Bay

New Invasive Plants of the Midwest Fact Sheet - MIPN.org

Invasive species - Wisconsin Department of Natural Resources

Invasive species - MinnesotaWildflower


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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.