Myriophyllum pedunculatum

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Myriophyllum pedunculatum


Terrestrial or semi-aquatic, whether or not growing in dense cushions. Leaves opposite, erecto-patent to reflexed, entire, rarely pinnate, the entire ones linear, (2-)4-15(-25) by 0.4-1 mm, obtuse to mucronate, above at apex with an ovate, darker coloured cushion-like thickening c. 0.2 mm long. Flowers solitary in the middle and upper leaf-axils, the lower often bearing the fruits of the last season; Fruit c. 1.2 by 1.2 mm, with apically spreading mericarps, these terete, with distinct tubercles.


Asia-Tropical: New Guinea present, Australasia: New South Wales (New South Wales present); Tasmania (Tasmania present), Chatham present, E. Papua present, Morobe Distr present, New Zealand present, Stewart Is present, Victorian Alps present, W. Australia present, Western Highlands present
New Zealand (also Chatham and Stewart Is.), Tasmania, Australia (Victorian Alps, New South Wales, also recorded from W. Australia); in Malesia: New Guinea (E. Papua: Western Highlands, Morobe Distr.). .


In all but one collection I have seen, the leaves are entire, but in one collection from Victoria (A. C. BEAUGLEHOLE 5887) the medium and lower leaves are pinnate with few filiform lobes. This observation clearly shows the great plasticity of the leaves in this genus.
M. longibracteolatum SCHINDL. differs only in quantitative characters.
M. votschii SCHINDL. from New Zealand is closely allied and might also belong to M. pedunculatum.


CHEESEMAN 1925: Man. New Zeal. Fl., ed. 2: 625
Hook.f. 1864 – In: Handb. New Zeal. Fl.: 67
MEIJDEN 1966 – In: Blumea: 245
BTH. 1864 – In: Fl. Austr.: 489
SCHINDL. 1905 – In: Pfl. R.: 85
Hook.f. 1969 – In: Blumea: 310
Hook.f. 1860: p. 122. – In: Fl. Tasm.: t. 23
CURTIS 1956 – In: Stud. Fl. Tasm.: 190
ALLAN 1961 – In: Fl. New Zeal.: 252