the plant was accidentally introduced to North America by seed and grain imports and spread easily through contaminated hay.

Of course, thistles are also characterized by spiny foliage. As well, some thistle species are valued as ornamental garden plants. Perhaps the most famous thistle of all (actually not a “true ...

When we see a plant and its prickly, we automatically assume it is a thistle and therefore it is a bad plant. The Oxford Dictionary defines a thistle as “A widely distributed herbaceous plant of ...

The bull thistle has prickly leaves with leather-like tops ... remains in the soil has the potential to bud and start a new plant. Control methods include: *Cut off unopened buds and flowers.

“Asters, Groundsels, and especially Thistles, afford most familiar examples of a hairy or downy pappus; those of thistles, &c. in autumn sailing about in every breeze.” — Asa Gray, “How ...

Tumbleweeds have completely taken over some western towns in the U.S., and while the pesky plants might seem useless ... showing the prickly thistle clumps piled up around cars and homes ...

Play the USA TODAY Daily Crossword Puzzle. As a plant, milk thistle has bright magenta or purple flowers surrounded by large, prickly leaves, "which expel a milky white sap when they are crushed ...

Milk thistle is an herbal remedy derived from the milk thistle plant, also known as Silybum marianum. This prickly plant has distinctive purple flowers and white veins, which traditional stories ...

The national flower of Scotland is the thistle and it is one of our most recognisable symbols. During summer, this group of prickly plants becomes more noticeable and it is no surprise as they can ...