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Chromosome Variation in the Heleocharis palustris-uniglumis Complex


THE Heleocharis (Eleocharis) palustris-uniglumis complex shows a considerable variation in chromosome number, the following figures being recorded in the literature: 2n = 10, 16, 32, 36, 38, 46, c. 69, 921. The taxonomical implications of this variation is under discussion2–4, but no definite conclusions have been reached. It was felt that more information about the chromosome variation was needed before definite conclusions as to the taxonomical status of the different chromosome types could be drawn.

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  1. 1

    Darlington, C. D., and Wylie, A. P., “Chromosome Atlas of Flowering Plants” (George Allen and Unwin, Ltd., London, 1955).

  2. 2

    Walters, S. M., J. Ecol., 37, 192 (1949).

  3. 3

    Löve, A., and Löve, D., “Chromosome Numbers of Northern Plant Species” (Ingólfsprent, Reykjavík, 1948).

  4. 4

    Jørgensen, C. A., Sörensen, Th., and Westergaard, M., Biol. Skr. Dan. Vid. Selsk., 9, No. 4, 3 (1958).

  5. 5

    Anderson, E., “Introgressive Hybridization” (John Wiley and Sons, Inc., New York; Chapman and Hall, Ltd., London, 1949).

  6. 6

    Clapham, A. R., Tutin, T. G., and Warburg, E. F., “Flora of the British Isles” (Cambridge University Press, 1952).

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