A common characteristic of the native thistle is typically (but not always) the presence of finely spun, silk-like or web-like hairs, especially around the bracts of the flower and commonly ...

Native thistles, however ... “New plants pop up from the roots, so where you had one Canada thistle last year, you might have 30 this year, and they are all interconnected,” says Moranz.

How did tumbleweeds spread across North America? Russian thistle isn't native to North America. It is instead native to dry and semi-dry regions throughout Europe and central Asia. The Russian thistle ...

Bull thistle, a member of the Asteraceae family, is yet another herbaceous biennial on our list of invasives. Unfortunately, bull thistle can flourish in an array of sites ranging from meadows, ...

“Thistle come as no surprise, invasives exploit native pollinators: comparing the reproductive success of an invasive and native thistle in the subtribe Carduinae (Asteraceae)” ...

Russian thistle was a problem around North Dakota in 1895. In fact, it is still sometimes a problem and is sometimes known as tumbleweeds. It is very similar to kochia, and both are considered ...

Canada thistle, a terrestrial herbaceous perennial in the Asteraceae family, is an open-land invasive that prefers disturbed upland areas as well as wet areas with water fluctuations. Canada thistle ...