Identifying features include: Like other thistles, bull thistle is armed with a great number of spines that can and will penetrate exposed skin. For more information visit the Midwest Invasive Species ...

This thistle was placed on the endangered species list in 1987 due to severe threats from cattle grazing in its habitat on the Lincoln National Forest, home to 95 percent of its populations. After the ...

Californian thistle is one of the most common thistle species in New Zealand. It is very troublesome in pastures because it is so difficult to control. Once a plant is established in pasture, it forms ...

"Milk thistle is highly adaptable and can destroy ecosystems, plus its seeds can remain viable for years," says Wilson. "It's also difficult to remove, thanks to its deep roots." All 65 species of ...

Nodding thistle is one of the most competitive thistle species causing problems in New Zealand pastures. It is known as musk thistle in some countries overseas. The species gets the name "nodding ...

What is milk thistle good for? Here are the advantages and downsides of taking milk thistle supplements – plus whether it is safe to do so.

For more information visit Midwest Invasive Species Information Network (MISIN). Canada thistle forms extremely extensive root systems that need to be repeatedly damaged to keep them from growing back ...

This thistle was placed on the endangered species list in 1987 due to severe threats from cattle grazing in its habitat on the Lincoln National Forest, home to 95 percent of its populations. After the ...