New Zealand Journal of Botany abstracts
Evidence for an allopolyploid complex in New Zealand Polystichum (Dryopteridaceae)
Leon R. Perrie
Institute of Molecular BioSciences
Massey University
Private Bag 11 222
Palmerston North, New Zealand
Email: L.R.Perrie@massey.ac.nz
Patrick J. Brownsey
Museum of New Zealand Te Papa Tongarewa
P.O. Box 467
Wellington, New Zealand
Peter J. Lockhart
Institute of Molecular BioSciences
Massey University
Private Bag 11 222
Palmerston North, New Zealand
Mark F. Large
School of Landscape and Plant Science
UNITEC
Private Bag 92025
Auckland, New Zealand
Abstract Evidence is provided for the first demonstrated example of allopolyploidy in the New Zealand fern flora. Cytological, morphological, and molecular (AFLP-DNA fingerprinting) analyses indicate that the fern previously known as Polystichum richardii constitutes an allopolyploid complex, in which four separate evolutionary lineages are present. These are here recognised as three taxonomic species, with one of these encompassing two subspecies. The two allo-octoploid lineages are accommodated under the reinstated name P. neozelandicum, each as a separate subspecies: P. neozelandicum subsp. neozelandicum and the new combination P. neozelandicum subsp. zerophyllum. The new combination P. wawranum is made for one of the tetraploid lineages, while the name P. oculatum is reinstated for the other. Polystichum richardii is a later synonym of P. neozelandicum, and hence is not a legitimate name for any of the taxa recognised here.
Keywords Polystichum; P. richardii; P. neozelandicum subsp. neozelandicum; P. neozelandicum subsp. zerophyllum; P. oculatum; P. wawranum; Dryopteridaceae; fern; allopolyploid; AFLP DNA-fingerprinting; taxonomy; species; evolution; lineage; New Zealand flora
B02054 Received 24 July 2002; accepted 13 February 2003; published 11 June 2003
New Zealand Journal of Botany, 2003, Vol. 41: 189-215
0028-825X/03/4102-0189 $7.00 © The Royal Society of New Zealand 2003
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