Chalcosyrphus nemorum (Fabricius 1805)

are mutualistic with

• Global Biotic Interactions: Salix ambigua
• Global Biotic Interactions: Polytaenia nuttallii DC. (Nuttall's prairie parsley)
• Global Biotic Interactions: Pycnanthemum virginianum (L.) T. Durand & B. D. Jacks. ex B. L. Rob. & Fernald (Virginia mountainmint)
• Global Biotic Interactions: Galium trifidum L. (three-petal bedstraw)
• Global Biotic Interactions: Mollugo verticillata L. (green carpetweed)
• Global Biotic Interactions: Hypoxis hirsuta (L.) Coville (common goldstar)
• Global Biotic Interactions: Dirca palustris L. (eastern leatherwood)
• Global Biotic Interactions: Persicaria foliosa var. paludicola (Makino) Hara
• Global Biotic Interactions: Cornus canadensis L. (bunchberry dogwood)
• Global Biotic Interactions: Echinocystis lobata (Michx.) Torr. & Gray (Balsam-apple)
• Global Biotic Interactions: Scrophularia marilandica L. (carpenter's square)
• Global Biotic Interactions: Lilium superbum L. (turk's-cap lily)
• Global Biotic Interactions: Gentiana puberula
• Global Biotic Interactions: Leonurus cardiaca L. (common motherwort)
• Global Biotic Interactions: Agalinis tenuifolia (Vahl) Raf. (slenderleaf false foxglove)
• Global Biotic Interactions: Phytolacca icosandra L. (tropical pokeweed)
• Global Biotic Interactions: Sanicula marilandica L. (Maryland sanicle)
• Global Biotic Interactions: Persicaria amphibia (L.) S. F. Gray (Amphibious Bistort)
• Global Biotic Interactions: Cubelium concolor (T. F. Forst.) Raf. (eastern greenviolet)
• Global Biotic Interactions: Helianthus grosseserratus M. Martens (sawtooth sunflower)
• Global Biotic Interactions: Erechtites hieracifolia
• Global Biotic Interactions: Helianthus tuberosus L. (Jerusalem artichoke)
• Global Biotic Interactions: Persicaria punctata (Ell.) Small (Dotted Smartweed)
• Global Biotic Interactions: Hypericum punctatum Lam. (spotted St. Johnswort)
• Global Biotic Interactions: Malva pusilla Sm. (low mallow)
• Global Biotic Interactions: Phlox glaberrima L. (smooth phlox)
• Global Biotic Interactions: Myosurus minimus L. (mousetail)