Honey bees are the dominant diurnal pollinator of native milkweed in a large urban park.

There was a marginally significant positive relationship between the biomass of A. syriaca per site and the number of “complete” pollinia on honeybee individuals ( t 159 = 2.748, p = .052; Figure 2 b), as well as a significant relationship with the number of corpusculum only that were attached per honeybee ( t 159 = 5.190, p < .001; Figure 2 d), the proportion of pollinia vectored ( t 159 = 6.047, p < .001) (Figure 2 f), and the total (pollinia + corpusculum only) ( t 159 = 4.695, p = .116).

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