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Abstract
Seven species of the fern genus Hypolepis Bernh. (Hypolepidaceae.: Dennstaedtiales) are recognised in New Zealand, including two, H. lactea and H. subantarctica, described for the first time and one new combination, H. ambigua. Three widely misapplied names, H. tenuifolia, H. punctata, and H. rugosula, are excluded from the New Zealand flora and the correct application of the names clarified. Six hybrid combinations are recorded, of which only one, H. ambigua × rufobarbata is common and all except H. lactea × rufobarbata are probably sterile. Hypolepis distans with n = 28 is cytologically and morphologIcally distinct from the other species and is thought to be representative of the primitive element 10 the genus. The other six species have. chromosome numbers of n = 52 or 104. Analysis of chromosomal pairing in wild hybrids suggests that the parent species have evolved by processes of autoand allopolyploidy similar to those demonstrated in many other genera of ferns.
Keywords:
- ferns
- Dennstaedtiales
- Hypolepidaceae
- Hypolepis
- Hypolepis ambigua
- Hypolepis dicksonioides
- Hypolepis distans
- Hypolepis lactea
- Hypolepis millefolium
- Hypolepis punctata
- Hypolepis rufobarbata
- Hypolepis rugosula
- Hypolepis subantarctica
- Hypolepis tenuifolia
- hybrids
- plant taxonomy
- key
- descriptions
- illustrations
- new species
- new combinations
- lectotypes
- distribution maps
- chromosome counts
- New Zealand flora
