Short answers, pulled from the story.
Cirsium possesses a tuft of feathered hairs called a pappus on its seeds. This structure differs from the simple unbranched hairs found on related genera such as Carduus and Silybum.
Native ranges stretch across Eurasia and northern Africa with about 60 species found in North America. Some populations exist outside these original zones due to human introduction efforts.
Bees and butterflies rely heavily on the abundant nectar produced during bloom time. Bumblebees particularly value this high output compared to other wildflowers.
493 accepted species exist within the current classification system for this large genus. Botanists have reclassified several former members into new genera like Afrocirsium.