There are many invasive plant species on Vancouver Island, but a few stand out as the worst culprits when it comes to ...

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 ...

They produce abundant seeds, plus spread through their roots [rhizomes]. “New plants pop up from the roots, so where you had ...

such as the Canada thistle, then you also have to consider the weed's roots, as both the roots and seeds are able to cause ...

While tumbleweeds may be no more than a prop in your favourite Western, they are the primary antagonist in the story of one of the fastest plant invasions in the history of the United States.

The alkaloids in this plant also taint honey produced by bees, causing it to be too bitter to sell. Canada thistle. It might have Canada in its name, but Canada thistle was introduced hundreds of ...

and covered in spines often found with multiple flowers per stem wind dispersed seeds carried by clusters of cotton-like fuzz Note: European marsh thistle is distinguished from Canada thistle by ...

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 ...

It originates from the milk thistle plant, native to Europe and Asia, but now largely grown in the United States. The active constituent in milk thistle, known as Silymarin, is thought to possess ...

As a public service, the herbarium offers free plant identifications. For more information, call 803-777-8175 or email johnbnelson@sc.rr.com.

However, there’s a lack of scientific evidence to definitively support the historical use of this plant. The need for additional research is partly due to the complexity of blessed thistle.

The milk thistle plant (Silybum marianum) is part of the Asteraceae family and is native to the Mediterranean. Its name comes from the milky white veins on the leaves and the white sap they ...