Yellow starthistle is identified as one of the most serious weeds in the Western U.S. Although it is an annual plant, it spreads rapidly and produces an extensive amount of seed. Its control is of ...

This-le, noun, widely distributed herbaceous plant of the daisy family, typically has prickly stems and leaves and rounded heads of purple flowers. There are more than 62 varieties of native thistles ...

You'd think in this era of modern science, there'd be nothing new under the sun. Well, get ready for a newly discovered species of plant. And it's called the funky thistle. It lives in some of the ...