Skip to main content
Today is World Oceans Day!
Close

Canada Thistle

Cirsium arvense

Published on Project Noah
Zoom
NominateNominate for Wildlife Photograph of the Month
reportFlag Spotting

39.0068, -84.6342

Field Notes

Description:

A bloomed Canada Thistle is a difficult weed to get rid of because of how aggressive it can get by infesting crops, pastures, roadsides, pastures, and non crop areas. One plant can take over 3-6 ft in diameter in 1 or 2 years.

Species ID Suggestions

Comments (0)

Be the first to comment

Sign in to comment

Spotted for Missions

Mission
Boone County HS Bioblitz 2014
Photographed
PublishedSeptember 3, 2014

Community Sponsor

Butterfly
Become a Community Sponsor and Help Grow our Global Movement!

Accelerate our Mission to Photograph 
Every Species in the World!

Butterflies icon
Become a Community Sponsor

Wildlife Community

Wildlife Community

Join a worldwide community passionate about wildlife and nature!

Join Project Noah

Nature School

Nature School

Transform your green space into a curiosity-creating nature classroom!

Visit Nature School

Wildlife Game

Wildlife Game

Defend wildlife throughout the jungle in thrilling nature game!

Play Baboon

Nature & Conservation Organizations

Brands & Mission-Focused Companies