Posts tagged with introduced

How many plants are in New Zealand?

  • The fork fern Tmesipteris tannensis is indigenous to New Zealand, being present here without human intervention. Moreover, it is endemic, being indigenous to New Zealand and nowhere else in the world. About 45% of the indigenous ferns and 80% of the indigenous seed plants are endemic to New Zealand. Photo Leon Perrie CC BY-NC.
  • Stereocaulon ramulosum is a common New Zealand-indigenous lichen. I suspect few New Zealanders would know it, which is symptomatic of the attention given to lichens, even though they contribute significant biomass to many ecological communities. Photo Leon Perrie CC BY-NC.
  • African club moss (Selaginella kraussiana) is an introduced lycophyte (and not a moss). It is very invasive, even into relatively undisturbed indigenous forests. It carpets the ground, suppressing the regeneration of indigenous plants. WELT P026410. Photo Leon Perrie. © Te Papa CC BY-NC-ND.
  • Anyone visiting New Zealand’s coast is likely to have seen Neptune’s necklace (Hormosira banksii). It is a very common, indigenous brown seaweed. But many New Zealand seaweeds are only poorly known. Photo Leon Perrie CC BY-NC.

I gave a talk on “Understanding and valuing our plants” at the recent open day of Otari-Wilton’s Bush in Wellington. I’m very interested in why New Zealand’s native species might be valued. I am hoping you can help me think about that – I welcome your input; look out for an upcoming blog post. But… Read more »

Weedy ferns

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  • Distribution of male fern, Dryopteris filix-mas, in New Zealand, based on specimens in Te Papa's WELT herbarium. Note that this is a significant under-representation.
  • Male fern

Chris Horne of the Wellington Botanical Society recently sent me a fern frond they collected on one of their trips. Although the frond is small and lacking the diagnostic reproductive characters, I think it is the introduced holly fern (Cyrtomium falcatum). It looks like the shining spleenwort (Asplenium oblongifolium), but the flanges, or ‘teeth’, of the… Read more »