Key points are not available for this paper at this time.
L. D. Harder, R. M. R. Barclay, The Functional Significance of Poricidal Anthers and Buzz Pollination: Controlled Pollen Removal From Dodecatheon, Functional Ecology, Vol. 8, No. 4 (Aug., 1994), pp. 509-517
Harder et al. (Mon,) studied this question.