Posts tagged with ferns

A new tree fern

The newly recognised Dicksonia lanata subsp. hispida. Fairly common in the northern North Island, usually in kauri forests. Photo Leon Perrie. © Te Papa.

New Zealand has a new tree fern – kind of. Te Papa Research Fellow Patrick Brownsey and I have recently recognised a subspecies within the stumpy tree fern, tuokura, Dicksonia lanata.  The new name is Dicksonia lanata subspecies hispida.  It is only kind of a new tree fern, as it was first recognised as something different… Read more »

Doodia rasp ferns become Blechnum hard ferns

  • Blechnum neglectum, previously Pteridoblechnum neglectum, found only in north-eastern Australia. Right: Blechnum diversifolium, from New Caledonia. Blechnum diversifolium is more closely related to the species previously placed in Pteridoblechnum than it is to most species of Blechnum. Photos Leon Perrie. Composite © Te Papa.
  • Blechnaceae ferns are common in several parts of the world. For instance, all New Zealanders will be familiar with kiokio and its relatives in the genus Blechnum, colloquially known as “hard ferns” because of their coriaceous fronds.  Kiokio (Blechnum novae-zelandiae) is a common sight on road cuttings, amongst other habitats, and occurs throughout the country. Photo Leon Perrie. © Te Papa.
  • Left: rasp fern, Blechnum parrisiae, previously called Doodia australis, occurs in both Australia and New Zealand. Right: Blechnum gibbum, from New Caledonia. Blechnum gibbum is more closely related to the species formerly placed in Doodia than it is to most species of Blechnum. Photos Leon Perrie. Composite © Te Papa.
  • Blechnum orientale, in Fiji. Most species of Blechnum in New Zealand are “dimorphic”, with obviously different fertile and sterile fronds. (The exception is Blechnum fraseri, which is only partially dimorphic.) However, many overseas Blechnum are “monomorphic” like Blechnum orientale, which is widespread in the tropics from Asia through Australia to the Pacific.  Photo Leon Perrie. (c) Te Papa.

A key principle in the scientific classification of animals, plants, and other living things is that the system of scientific names reflects their relationships. This is because there is only a single evolutionary history, and it provides an objective basis by which to name life. As we learn more about these evolutionary relationships, scientific names… Read more »

What ferns were found during the ‘Find ferns…’ competition?

  • Button fern, Pellaea rotundifolia, was one of the most frequently reported ferns. Photo (c) Leon Perrie.
  • Hound's tongue, Microsorum pustulatum, was one of the most frequently reported ferns. Photo (c) Leon Perrie.
  • Male fern, Dryopteris filix-mas, is an introduced weed in New Zealand.  It was reported several times. Photo (c) Leon Perrie.
  • Mamaku, Cyathea medullaris, was one of the most frequently reported ferns.  Photo (c) Leon Perrie.

Thanks to those who entered our ‘Find ferns and win!’ competition as part of our Science Live: The Secret World of Ferns broadcast. And, congratulations to the lucky winner! Watch The Secret World of Ferns. Lots of different ferns were spotted – some 44 species. One of the interesting finds was reported by shona_t via… Read more »

Forgotten Highway ferns

  • Umbrella fern, tapuwae kotuku, Sticherus cunninghamii.  Most species in this family have fronds that repeatedly split into two. Photo Leon Perrie. © Te Papa.
  • Sweet fern, Pteris macilenta.  The reproductive structures are in lines along the margins of the frond segments, and the veins are obviously netted (diverging and coming back together). Photo Leon Perrie. © Te Papa.
  • Single crape fern, heruheru, Leptopteris hymenophylloides.  Although translucent like a filmy fern, this species grows much bigger and the spore-producing structures are scattered over the frond undersides.  Photo Leon Perrie. © Te Papa.
  • Hairy fern, Lastreopsis hispida.  A shield fern with its reproductive structures in circular aggregates, this species is easily recognised by the hairy bristles on its frond stalk. Photo Leon Perrie. © Te Papa.

Three of Te Papa’s botanists (plant scientists) are currently at the annual John Child Bryophyte and Lichen Workshop, held this year in Ohakune.    A small group including the Te Papa team spent the week before the Workshop exploring the Forgotten Highway (State Highway 43) between Stratford and Taumarunui, for mosses and liverworts, and ferns as… Read more »

Arthropteris climbing ferns

Arthropteris_tenella_climbing_reduced

I’m a co-author of a just-published scientific paper examining the evolution and classification of the Arthropteris climbing ferns. The paper was a real international collaboration, involving authors from China, Netherlands, France, United Kingdom, and New Zealand. It is unclear how many species there are of Arthropteris – probably somewhere between 10 and 20. They occur… Read more »