Flowering Plants Visited
by Psithyrus
variabilis
Psithyrus variabilis Cresson: Apidae (Bombini), Hymenoptera
(observations are from Robertson, Graenicher, Smith et al.)
Asclepiadaceae: Asclepias sullivanti [plpr sn] (Rb); Asteraceae: Aster sp. sn (Smh), Aster anomalus sn (Rb), Aster ericoides sn (Rb), Aster novae-angliae sn (Gr), Aster pilosus sn fq (Rb), Aster salicifolius sn (Rb), Bidens aristosa sn (Rb), Cirsium altissimum sn (Rb, Gr), Cirsium discolor sn fq (Rb), Cirsium hillii sn (Rb), Cirsium vulgare sn (Rb), Conoclinium coelestinum sn (Rb), Echinacea pallida sn (Rb), Echinacea purpurea sn (Rb), Eupatorium serotinum sn (Rb), Euthamia graminifolia sn (Gr), Helianthus annuus sn (Rb), Helianthus grosseserratus sn fq (Rb), Oligoneuron rigidum sn (Rb), Rudbeckia laciniata sn (Rb, Gr), Solidago sp. sn (Smh), Solidago canadensis sn (Rb, Gr), Solidago speciosa sn (Rb), Vernonia fasciculata sn fq (Rb); Fabaceae: Amorpha canescens sn (Rb), Dalea purpurea sn (Rb), Melilotus alba sn (Rb), Trifolium pratense sn fq (Rb), Trifolium repens sn (Rb); Geraniaceae: Geranium maculatum sn (Rb); Hydrophyllaceae: Hydrophyllum appendiculatum sn (Rb), Hydrophyllum virginianum sn (Rb); Lamiaceae: Blephilia ciliata sn (Rb), Blephilia hirsuta sn (Rb), Lycopus americanus sn (Rb), Pycnanthemum tenuifolium sn (Rb), Teucrium canadense sn (Rb); Polemoniaceae: Phlox divaricata laphamii sn (Rb), Polemonium reptans sn (Rb); Polygonaceae: Persicaria lapathifolia sn (Rb); Rosaceae: Rubus allegheniensis sn (Rb); Rubiaceae: Cephalanthus occidentalis sn (Rb), Hedyotis nigricans sn (Smh); Verbenaceae: Verbena stricta sn (Rb)