COMPARATIVE ANATOMY OF THE GAMETOPHYTES IN DAWSONIA (POLYTRICHALES, MUSCI)

Abstract

  The organization of the conducting tissue-system in the gametophytes of Dawsonia has been investigated by light and electron microscopy. Both normal-sized and gigantic forms, selected as representative of the various sections and “complexes” recognized within the group (van Zanten, 1973), have been studied. Gigantism and certain anatomical features of Dawsonia are briefly discussed.