The Jan. 28 meeting of the El Dorado Chapter of the California Native Plant Society will focus on the bane of most ...

Despite its name, Canada thistle is not a plant native to Canada. This noxious weed likely came over with early settlers to North America before New England residents blamed its spread on French ...

Bull thistle (Cirsium vulgare) is another biennial (sometimes annual) invasive weed you should be wary of since it's prevalent across all U.S. states. Its giveaways include the 2-inch wide ...

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 ...

Milk thistle is native to Mediterranean countries but is classified as a weed in the United States. Washington state classifies it as a noxious weed because milk thistle is considered a threat to ...

Canada thistle differs from other species of the true thistle in that there are male and female flower heads, and these are on separate plants. By asexual reproduction, it is possible that a colony of ...

Numerous kinds of thistles are considered to be "noxious weeds." Noxious plants are illegal ... plumeless, and bull thistle" and "Johnsongrass (sorghum halepense) or hybrids that contain ...