Species

Notogrammitis rigida

Etymology

Notogrammitis: From the Greek noto- ‘southern’ and gramma ‘line', referring to this new genus of southern strap ferns which were previously in Grammitis.
rigida: rigid

Common Name(s)

Southern strap-fern

Current Conservation Status

2012 - At Risk - Naturally Uncommon

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 - At Risk - Naturally Uncommon
2004 - Sparse

Qualifiers

2012 - Sp
2009 - DP, SO

Authority

Notogrammitis rigida (Hombron) Parris

Family

Polypodiaceae

Flora Category

Vascular - Native

NVS Species Code

NOTRIG

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

Grammitis crassa Fée; Grammitis rigida Hombron; Polypodium australe var. rigida (Hombron) Cockayne; Polypodium billardierei var. rigidum (Hombron) Cockayne

Distribution

Endemic. South Island (Fiordland coast), Stewart and Auckland Islands.

Habitat

Coastal. Usually terrestrial, this fern is confined to mossy rock faces, shaded cliff faces and recesses just above the high tide mark. It is occasionally found as a low epiphyte in coastal shrubland.

Features

Tufted, terrestrial, rupestral or epiphytic fern. Rhizome sub-erect to short-creeping; paleae red-brown, lanceolate, acute, 8.0-13.0 × 1.0-1.2 mm. Stipe indistinct, winged almost to base; stipe hairs absent. Lamina (90-)100.2-170.6(-220.0) × (10-)10.2-11(-18) mm;linear-oblanceolate to oblanceolate, acute, lamina hairs absent or scattered, mainly on midrib, brown, multicellular, to 1 mm long; texture thickly coriaceous; veins invisible or rarely slightly raised on lower surface in dried material; endings not darkened; midrib slightly raised on lower surface, concolorous with or darker than lamina. Sori oblong to linear, oblique, in middle and upper part of frond, c.20-30 pairs, 2-10 × 1.5-3.0 mm; soral vein extending beyond the sorus, equal in length to the basiscopic vein, both sometimes branching and anastomosing, both nearly reaching the margin. Sporangia (250-)293.9-349.1(-400) micronslong; indurated cells of annulus (10-)10.8-12.8(-16). Spores (33-)37.4-46.0(-57) microns diameter.

Similar Taxa

A distinctive species unlikely to be confused with any other strap-fern. The bright green, leathery fronds, 10 or more mm wide, with their irregular marginal lobes and projections immediately distinguish this from all other indigenous strap-ferns.

Flowering

Not applicable - spore producing

Flower Colours

No Flowers

Fruiting

Not applicable - spore producing

Propagation Technique

Difficult. Should not be removed from the wild.

Threats

Generally regarded as a naturally uncommon species. This species is characteristic of the high rainfall portions of the coastline of Fiordland, Stewart and the Auckland Islands. Within these habitats it can at times be locally common though often sparsely distributed in its occurrences. There is, as yet, no evidence of any decline happening within this species range.

Endemic Taxon

Yes

Endemic Genus

No

Endemic Family

No

Life Cycle and Dispersal

Minute spores are wind dispersed (Thorsen et al., 2009).

Where to Buy

Not commercially available

Taxanomic notes

The New Zealand species of Grammitis along with Ctenopteris heterophylla and one Australian Grammitis (G. garrettii) one Lord Howe (G. diminuta) and one species endemic to the Moluccas and Indonesian (G. kairatuensis) have traditionally been placed in Grammitis (Parris & Given 1976; Parris 1998). However, these species (with the exception of G. diminuta, G. kairatuensis and G. stenophylla; B.S.Parris pers. comm. to P.J. de Lange January 2011) have now been transferred to a new genus, Notogrammitis Parris (Perrie & Parris 2012).

Attribution

Fact sheet prepared for NZPCN by P.J. de Lange (25 April 2011). Description from Parris & Given (1976)

References and further reading

Parris, B.S. 1998: Grammitidaceae. Flora of Australia 48: 450-468.

Parris, B.S.; Given, D.R. 1976: A taxonomic revision of Grammitis Sw. (Grammitidaceae: Filicales) in New Zealand. New Zealand Journal of Botany 14: 85-111.

Perrie, L.R.; Parris, B.S. 2012: Chloroplast DNA sequences indicate the grammitid ferns (Polypodiaceae) in New Zealand belong to a single clade, Notogrammitis gen. nov. New Zealand Journal of Botany 50: 457-472.

Thorsen, M. J.; Dickinson, K. J. M.; Seddon, P. J. 2009. Seed dispersal systems in the New Zealand flora. Perspectives in Plant Ecology, Evolution and Systematics 11: 285-309

This page last updated on 28 Sep 2014