few are as problematic as Canada thistle. This plant has a tenacious and fast-growing root system. A single seed is all it takes for an entire patch to spring up and spread. Plus, it's prickly to ...

It may look like the last thing you'd want to eat, but that scary-looking bull thistle is edible. Here's how to prepare it ...

The lobes in each leaf of prickly sow thistle do not tend to cut in so close to the midrib of the plant as in sow thistle leaves. It could also perhaps be confused with hawksbeard due to its leafy ...

It is unwanted in pasture because livestock do not like grazing too close to the spiny foliage, so pasture plants beside thistle plants don’t get eaten. The Californian thistle can be very competitive ...

European marsh thistle, a terrestrial and wetland herbaceous biennial in the Asteraceae family, is an invasive plant that prefers moist soils ... are alternate with deeply pinnate segments and spiny ...

Canada thistle is a colony-forming perennial from ... Leaves are alternate, lacking petioles, oblong or lance-shaped, divided into spiny-tipped irregular lobes. Flowers are unisexual, on separate ...