Cirsium is commonly referred to as thistle. However, there are several other synonyms for this word, including cardoon, globe thistle, and plume thistle. The cardoon is a close relative of the artichoke and is typically cultivated for culinary purposes. The globe thistle is a popular ornamental plant with vibrant blue flowers and a spiky appearance. The plume thistle is known for its long, feathery petals that resemble a bird's plume. While all of these plants are part of the cirsium genus, they have distinct characteristics that differentiate them from one another, making them unique additions to any garden or landscape.