Flowering Plants Visited
by Systoechus vulgaris

Systoechus vulgaris Loew: Bombyliidae, Diptera
(observations are from Robertson, Graenicher, Wist, Robson, and Wilhelm & Rericha)

Asclepiadaceae: Asclepias verticillata [plab sn] (Rb); Asteraceae: Bidens cernua sn (Rb), Boltonia asterioides sn (Rb), Cirsium discolor sn (Rb), Cirsium vulgare sn fq (Rb), Coreopsis palmata sn (Rb), Coreopsis tripteris sn (Rb), Echinacea angustifolia (Ws), Echinacea purpurea sn (Rb), Eupatoriadelphus purpureus sn/fp (Rb, Gr), Eupatorium serotinum sn (Rb), Helianthus divaricatus sn (Rb), Helianthus grosseserratus sn fq (Rb), Helianthus mollis sn fq (Rb), Helianthus pauciflorus sn (Rb), Helianthus strumosus sn (Rb, Gr), Helianthus tuberosus sn fq (Rb), Heliopsis helianthoides sn/fp (Rb, Gr), Liatris pycnostachya sn (Rb, WR), Liatris spicata sn (WR), Ratibida pinnata sn (Rb), Rudbeckia hirta (WR), Rudbeckia laciniata sn (Rb), Rudbeckia subtomentosa sn fq (Rb), Rudbeckia triloba sn (Rb), Silphium integrifolium sn (Rb), Silphium lanciniatum sn (Rb), Silphium perfoliatum sn fq (Rb), Silphium terebinthinaceum sn (Rb), Solidago juncea sn/fp (Gr), Verbesina helianthoides sn (Rb), Vernonia fasciculata sn (Rb), Vernonia missurica sn (WR); Campanulaceae: Lobelia spicata sn (Rb); Fabaceae: Dalea purpurea sn (Rb), Dalea villosa fq (Rbs), Lespedeza procumbens sn (Rb), Melilotus alba sn/fp (Gr), Trifolium repens sn (Rb); Lamiaceae: Blephilia hirsuta sn (Rb), Calamintha arkansana sn (WR), Monarda fistulosa sn/fp fq (Rb, Gr), Pycnanthemum pilosum sn (Rb), Pycnanthemum virginianum (WR), Stachys palustris sn (Rb), Teucrium canadense sn/fp (Rb, Gr); Lythraceae: Lythrum alatum sn (Rb); Polygalaceae: Polygala sanguinea sn (Rb); Polygonaceae: Persicaria hydropiperoides sn (Rb); Primulaceae: Lysimachia quadriflora exp (WR); Ranunculaceae: Anemone canadensis exp (WR); Verbenaceae: Phyla lanceolata sn (Rb), Verbena hastata sn/fp fq (Rb, Gr), Verbena stricta sn fq (Rb, WR)

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