Flowering Plants Visited
by Syrphus
torvus
Syrphus torvus Osten Sacken: Syrphidae, Diptera
(observations are from Robertson, Graenicher, Anderson & Hill, Schemske et al., Small, and Vogt)
Apiaceae: Chaerophyllum procumbens sn (Rb), Heracleum maximum sn (Rb); Aquifoliaceae: Nemopanthus mucronatus (Sm); Asteraceae: Aster drummondii sn/fp (Gr), Aster laevis sn/fp (Gr), Aster lateriflorus sn (Rb); Brassicaceae: Arabis shortii sn (Rb), Dentaria laciniata (Shm); Hamamelidaceae: Hamamelis virginiana sn/fp (AH); Lauraceae: Sassafras albidum sn (Rb); Orchidaceae: Cypripedium reginae exp (Vgt); Polygonaceae: Persicaria pensylvanica sn (Rb); Portulacaceae: Claytonia virginica sn (Rb, Shm); Ranunculaceae: Enemion biternatum fp/exp (Shm), Ranunculus septentrionalis sn (Rb); Rosaceae: Aronia melanocarpa fq (Sm), Crataegus coccinea sn (Rb), Prunus americana sn (Rb); Salicaceae: Salix amygdaloides [pist sn] (Rb), Salix rigida [stam sn] (Rb)