Species

Icarus filiformis

Etymology

filiformis: From the Latin filum 'thread' and forma 'shape', meaning thread-shaped

Common Name(s)

thread fern, climbing hard fern

Current Conservation Status

2012 - Not Threatened

Conservation status of New Zealand indigenous vascular plants, 2012
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2012 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2009 and replaces all previous NZTCS lists for vascular plants. Authors: Peter J. de Lange, Jeremy R. Rolfe, Paul D. Champion, Shannel P. Courtney, Peter B. Heenan, John W. Barkla, Ewen K. Cameron, David A. Norton and Rodney A. Hitchmough. File size: 792KB

Previous Conservation Status

2009 - Not Threatened
2004 - Not Threatened

Authority

Icarus filiformis (A.Cunn.) Gasper et Salino

Family

Blechnaceae

Flora Category

Vascular - Native

NVS Species Code

BLEFIL

The National Vegetation Survey (NVS) Databank is a physical archive and electronic databank containing records of over 94,000 vegetation survey plots - including data from over 19,000 permanent plots. NVS maintains a standard set of species code abbreviations that correspond to standard scientific plant names from the Ngä Tipu o Aotearoa - New Zealand Plants database.

Structural Class

Ferns

Synonyms

Struthiopteris filiformis (A.Cunn.) Ching; Spicanta filiformis (A.Cunn.) Kuntze; Stenochlaena heteromorpha J.Sm.; Stenochlaena hügelii (C.Presl) Fée ex Underw.; Lomaria propinqua A.Cunn.; Lomariopsis heteromorpha (J.Sm.) T.Moore; Lomariopsis hügelii C.Presl; Blechnum reptans Luerss.; Lomaria filiformis A.Cunn.; Lomaria pimpinellifolia Hook.f.; Blechnum filiforme (A.Cunn.) Ettingsh.

Flower Colours

No Flowers

Threats

Not Threatened

Chromosome No.

2n = 66

Endemic Taxon

Yes

Endemic Genus

Yes

Endemic Family

No

TAXONOMIC INFORMATION

Perrie et al. (2014) advocated for a broadened circumscription of Blechnaceae whereby a number of genera traditionally recognized as distinct from Blechnum were merged within it. However, this view has not met with universal acceptance (see Gasper et al. 2016) and does not seem to be followed worldwide (PPG 2016). From a New Zealand perspective the decision to merge Doodia in Blechnum, and rejection of Diploblechnum has not been universally accepted either e.g., Wilcox & Warden (2017), and as such it is considered appropriate to follow world opinion and accept the taxonomy of Gasper et al. (2016) and recommendations of the PPG (2016).

References and further reading

Gasper, A.L.; de Oliveira Dittrich, V.A.; Smith A.R.; Salino, A. 2016:  A classification for Blechnaceae (Polypodiales: Polypodiopsida): New genera, resurrected names, and combinations. Phytotaxa 275: 191–227.

Perrie, L.R.; Wilson, R.K.; Shepherd, L.D.; Ohlsen, D.J.; Batty, E.L.; Brownsey, P.J.; Bayly, M.J. 2014: Molecular phylogenetics and generic taxonomy of Blechnaceae ferns. Taxon 63(4): 745-758.

PPG 1: The Pteridophyte Phylogeny Group 2016: A community-derived classification for extant lycophytes and ferns. Journal of Systematics and Evolution 54: 563-603.

Wilcox, M.; Warden, J. 2017: Botany of Hillsborough coast bush reserves, Manukau Harbour, Auckland. Auckland Botanical Society Journal 72: 32-46.

This page last updated on 5 Sep 2017