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 ...

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 ...

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 ...

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 ...