Cirsium suffultum (Maxim.) Matsum.

are host of

• Global Biotic Interactions: Puccinia calcitrapae DC. 1805
• Global Biotic Interactions: Puccinia nishidana Henn. 1901
• Global Biotic Interactions: Puccinia calcitrapae DC. 1805

have flowers visited by

• Global Biotic Interactions: Megacampsomeris grossa (Fabricius 1804)
• Global Biotic Interactions: Bombus diversus Smith 1869
• Global Biotic Interactions: Nonarthra cyanea