Cirsium Tuberosum. Cirsium Is A Genus Of Perennial And Biennial Flowering Plants In The Asteraceae, One Of Several Genera Known Commonly As Thistles. They Are More Precisely Known As Plume Thistles. These Differ From Other Thistle Genera (Carduus, Silybum And Onopordum) In Having Feathered Hairs To Their Achenes. The Other Genera Have A Pappus Of Simple Unbranched Hairs.

KEYWORDS

achenes asteraceae biennial carduus cirsium commonly differ feathered flowering genera genus hairs one onopordum pappus perennial plants plume precisely silybum simple thistle thistles tuberosum unbranched