Species At Risk

Tuberous Indian-plantain

(Arnoglossum plantagineum)

Special Concern

Tuberous Indian-plantain
Tuberous Indian-plantain occurrences map


The Tuberous Indian-plantain is a perennial plant in the aster family. It grows as a flat rosette of leaves that hug the ground, but in spring sends up a tall flower stalk that can reach 1.8 metres in height. The stalk produces a flat-topped cluster of 30 to 100 white flowers that bloom from June to August.

Action we are taking:


In the United States, the range of the Tuberous Indian-plantain extends from Ohio and Michigan west to South Dakota, south to Texas and Alabama and east to the Appalachians. In Canada, it only grows in southern Ontario, where it is believed to still occur at about 18 sites near Lake Huron, most of them on the west side of the Bruce Peninsula.


This species prefers open sunny areas in wet, calcium-rich meadows or shoreline fens. In Ontario, it grows along river banks and in wetlands near Lake Huron.


The main threats to this species in Ontario are the mowing of wet meadows for hay, trampling by livestock along riverbanks, draining of wetlands for cottage and shoreline development, and impacts of recreational activities.


Tuberous Indian-plantain is listed as a species of Special Concern under Ontario’s Endangered Species Act. Although species of Special Concern do not receive legal protection under this act, at least two populations of this species are in nature reserves which afford them some protection. Most Tuberous Indian-plantain plants are growing on private land.

What You Can Do to Help the Tuberous Indian-plantain

  • The Ministry of Natural Resources tracks species at risk such as the Tuberous Indian-plantain. You can use a handy online form to report your sightings to the Natural Heritage Information Centre. Photographs with specific locations or mapping coordinates are always helpful. nhic.mnr.gov.on.ca
  • Report any illegal activity related to plants and wildlife to 1-877-TIPS-MNR (847-7667).
  • Private land owners have a very important role to play in species recovery. You may be eligible for stewardship programs that support the protection and recovery of species at risk and their habitats.
  • Volunteer with your local nature club or provincial park to participate in surveys or stewardship work focused on species at risk.

Did you know?

The Tuberous Indian-plantain reproduces from seeds that are dispersed by the wind. Wind dispersal is aided by a "parachute" of hairs on top of each seed, which allow the seeds to travel greater distances.

Did you know?

"Tuberous" refers to the plant’s fleshy, thickened roots.

The Endangered Species Act

Contact your local ministry office

Often the best source of local information on species at risk is your nearest ministry office. Call with your questions or concerns.