Departure patterns of bumble bees on treated inflorescences of Aconitum columbianum. Four microliters of 30% sucrose solution were placed in bottom flowers of the inflorescence, with zero microliters (empty) in second-from-bottom flowers. The notation in this and all subsequent tables is , 2 standing for bees that began by visiting the empty second flower first, without visiting the bottom flower. 1, 2 stands for bees visiting the treated bottom flower and then the empty second flower. Goodness of fit test for the null hypothesis of equal probability to depart: .