Abstract
Data on pollen nuclear number are presented for 74 of the 111 currently accepted genera of theAraceae — one of only three monocot families in which both bi- and trinucleate pollen are known to occur. Binucleate pollen, which characterizes 65% of aroid genera, is regarded as the primitive type inAraceae and monocots as a whole. The trend toward the trinucleate condition appears to be irreversible, and to have occurred many times within the family.Syngonium becomes the sixth angiosperm genus in which both character-states are known to occur; otherwise, the character is highly conservative at the generic level. Pollen nuclear number shows no evident correlation with pollen size, starch content or pollinator type.
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Grayum, M.H. Phylogenetic implications of pollen nuclear number in theAraceae . Pl Syst Evol 151, 145–161 (1986). https://doi.org/10.1007/BF02430271
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DOI: https://doi.org/10.1007/BF02430271