Flowering Plants Visited
by Platycheirus
obscurus
Platycheirus obscurus Say: Syrphidae, Diptera
(observations are from Robertson, Graenicher, Schemske et al., Barrett & Helenurm, and Lindsey)
Apiaceae: Erigenia bulbosa sn fq (Rb), Thaspium trifoliatum flavum fq (Lnd); Asteraceae: Antennaria neglecta [unsp sn/fp] (Gr), Aster cordifolius (Gr), Aster laevis sn/fp (Gr), Aster puniceus sn/fp (Gr), Senecio aureus sn/fp (Gr), Solidago juncea sn/fp (Gr); Berberidaceae: Caulophyllum thalictroides sn (Rb); Caryophyllaceae: Stellaria media sn (Rb); Grossulariaceae: Ribes hirtellum fp (Gr); Lauraceae: Sassafras albidum sn (Rb); Portulacaceae: Claytonia virginica sn (Rb, Shm); Primulaceae: Trientalis borealis (BH); Ranunculaceae: Enemion biternatum fp/exp (Rb), Ranunculus septentrionalis sn (Rb); Salicaceae: Salix amygdaloides [pist sn] (Rb); Salix discolor [unsp sn/fp] (Gr), Salix interior [stam sn] (Rb), Salix rigida [stam sn] (Rb); Violaceae: Viola pubescens fp np (Rb)