CYTOGEOGRAPHY OF NYMPHOIDES (MENYANTHACEAE)

@inproceedings{Ornduff1970CYTOGEOGRAPHYON,
  title={CYTOGEOGRAPHY OF NYMPHOIDES (MENYANTHACEAE)},
  author={Robert Ornduff},
  year={1970}
}
Chromosome counts indicate that x = 9 in the aquatic genus Nymphoides (Menyanthaceae). New World species are tetraploid, but diploid species as well as tetraploid ones occur in the Old World. The pan-tropical N. indica is tetraploid in the New World and diploid in the Old World, but no consistent morphological characters have been found that separate these chromosomal races. The Eurasian N. peltata is hexaploid. Self-incompatible distyly, dioecism, and homostyly are present in the genus. The… CONTINUE READING

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