Posts tagged with Polystichum

Snares Islands Flora: the ferns

  • Catchments sloping to the east on North East Island. Image: Antony Kusabs, Te Papa.
  • Bare substrate and titi / mutton bird burrows in Olearia lyallii forest, a common site on North East Island. Image: Antony Kusabs, Te Papa
  • Underside of Asplenium scleroprium frond showing sori extending to lamina margins. Above Hoho Stream, North East Island. Image: Antony Kusabs, Te Papa
  • Asplenium scleroprium, above Hoho Stream, North East Island. Image: Antony Kusabs, Te Papa

There are currently five recognised species of fern on the Snares Islands, the closest sub-antarctic island group to New Zealand. North East Island, the main island of the Snares group, slopes gently downhill from the tall, tussock covered western cliffs towards the forested east coast, creating four small catchments, which drain into Boat Harbour and Hoho Bay.  This combination… Read more »

Curiosities, world-firsts, and monsters – fern spotting in Wellington

  • A so-called monstrous or crested frond of hound’s tongue fern, Microsorum pustulatum. The lobes of the fronds of hound’s tongue fern do not normally fork at their apices. Photo © Leon Perrie.
  • First record of the hybrid between Polystichum neozelandicum and P. silvaticum. Photo © Leon Perrie.
  • The reproductive structures of Polystichum silvaticum are naked, lacking the shield-like protective coverings that characterise its relatives. Photo © Leon Perrie.
  • Polystichum_silvaticum_6784_WrightHill4

On Saturday I joined the Wellington Botanical Society’s field trip to Wright Hill in Karori, Wellington. Wellington city would not be my first choice of locality for fern spotting, but we still found plenty to keep me interested. The filmy ferns Hymenophyllum flexuosum and Trichomanes endlicherianum are always pleasing finds. Although widespread, they are not… Read more »