Species

Notogrammitis rawlingsii

Etymology

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

Common Name(s)

Rawlings 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

Authority

Notogrammitis rawlingsii (Parris) Parris

Family

Polypodiaceae

Flora Category

Vascular - Native

NVS Species Code

NOTRAW

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 rawlingsii Parris

Distribution

Endemic. New Zealand: North, Little and Great Barrier Islands, from Herekino and Puketi Forests south to the Coromandel Peninsula (Waikawau Bay), upper Kauaeranga Valley and Mt Pirongia. Locally common around Warkworth and in some kauri remnants in North Shore, Auckland.

Habitat

This species is characteristically associated with kauri (Agathis australis) forest, or forest remnants, where it invariably grows amongst mosses, on rotting logs, exposed roots or as a low epiphyte.

Features

Terrestrial, rupestral (or rarely a low epiphyte) fern. Rhizome short-creeping; paleae pale brown, lanceolate, acute to broadly acute, 4.0-4.5 × 1.0 mm. Stipe indistinct, winged nearly to base; stipe hairs whitish, sparse to common, to 1.5 mm long. Lamina linear-oblanceolate, acute, (103-)104-137(-143) × (4-)4.5-5.5(-6) mm; hairs around and within the sori dark red-brown, stout, sometimes hooked, common to abundant, to 0.5 mm long; lamina hairs elsewhere rare, on margins and midrib, reddish brown, to 0.4 mm; texture thinly coriaceous; veins invisible, endings not darkened; midrib raised on lower surface, concolorous with lamina. Sori oblong, oblique, in upper half of frond, 12—22 pairs, 3-5 × 1 mm; soral vein ending within sorus or extending a little beyond it, shorter than basiscopic vein, neither usually reaching margin. Sporangia (160-) 163.6-203.0(-210) microns long; indurated cells of annulus (10-)10.8-13.6(-14). Spores (23-)23.3-25.9(-27) microns diameter.

Similar Taxa

Perhaps most frequently confused with Notogrammitis billardierei, which is superficially similar in that it has linear to narrowly elliptic fronds with blunt apices. However, the sori of Notogrammitis billardierei are glabrous lacking the encircling red-brown hairs diagnostic of N. rawlingsii.

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

Although this species is now recognised as being more widespread than when it was first described in the 1970s, it is still rather local, and surprisingly absent from some areas of seemingly suitable habitat (e.g., the Waitakere Ranges). As a rule populations tend to be very localised and small so this species is especially prone to over collection by zealous fern hunters and botanists. The species is now very close to extinction at its type locality at Waipoua, and there is some evidence that this has arisen because of illegal fern collection, though gradual drying out of the forest may also be responsible (B.S. Parris pers. comm.).

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

Taxonomic 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 (January 2005). 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 22 Jan 2017