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J. J. Armesto, G. P. Cheplick, M. J. McDonnell, Observations on the Reproductive Biology of Phytolacca americana (Phytolaccaceae), Bulletin of the Torrey Botanical Club, Vol. 110, No. 3 (Jul. - Sep., 1983), pp. 380-383
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Armesto et al. (1983) studied this question.
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