• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Seed Study - Onopordum acanthium

Onopordum acanthium - Scotch Thistle

Onopordum acanthium - Scotch Thistle

NPS Photo

Species: Onopordum acanthium
Common name:
Scotch thistle

Seedling Identification: Beware of confusing this one (in the seedling stage) with the native thistle Cirsium undulatum. There is no reliable way to differentiate between the species until the plants get some size and age.

 

Did You Know?

American bison on the Wind Cave National Park prairie

The American bison is the largest terrestrial mammal in North America. Male bison can weigh a ton and can run 35 miles per hour. Do not approach bison. They weigh more and can outrun you. More...