rough filmy fern
Mecodium scabrum (A. Rich.) Copel.; Sphaerocionium scabrum (A.Rich.) C.Presl; Diplooephyllum scabrum (A.Rich.) Bosch; Sphaerocionium glanduliferum C.Presl;
Vascular – Native
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.
2n = 72, 144
Current conservation status
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2017 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2012 and replaces all previous NZTCS lists for vascular plants. Authors: By Peter J. de Lange, Jeremy R. Rolfe, John W. Barkla, Shannel P. Courtney, Paul D. Champion, Leon R. Perrie, Sarah M. Beadel, Kerry A. Ford, Ilse Breitwieser, Ines Schönberger, Rowan Hindmarsh-Walls, Peter B. Heenan and Kate Ladley.
2012 | Not Threatened
Previous conservation statuses
2009 | Not Threatened
2004 | Not Threatened
Endemic. New Zealand: North, South, Stewart, Chatham Islands.
Coastal to montane. Usually in closed forest where it may be epiphytic or found growing on rotting logs, on moss hummocks, boulders or on the ground. Occasionally found in closed scrub.
Epiphytic and/or terrestrial fern forming widely spaced tufts of fronds along a long-creeping, slender but pliant and wiry sparsely to densely hairy rhizome. Frond dark green to olive green. Stipe 40-150(-200) mm long, stout, not winged, densely covered in bristly hairs; rachises narrowly winged in upper part, covered in copious bristly hairs. Laminae 100-400 × 50-140 mm, ovate, ovate-deltoid, 3-4-pinnate, densely to sparsely bristly hairy when young. Ultimate segments linear, margins entire. Sori terminating ultimate segments, not sunk in lamina, many on each primary pinna. Indusium broadly ovoid to almost orbicular, abaxial surfaces smooth; indusial flaps minutely toothed.
A distinctive species readily identified by the large, dark green or olive green ovate to ovate-deltoid fronds and conspicuously bristly hairy stipes. Drying and dried specimens usually faintly stain paper brown or yellow-brown.
Minute spores are wind dispersed (Thorsen et al., 2009).
Difficult - should not be removed from the wild
hymenophyllum: Membranous leaf, from the Greek humen and phullon
scabrum: Rough, covered with hard short rigid points
Where To Buy
Not commercially available
Fact sheet prepared for NZPCN by P.J. de Lange (21 April 2011). Description adapted from Brownsey & Smith-Dodsworth (2000).
References and further reading
Brownsey, P.J.; Smith-Dodsworth, J.C. 2000: New Zealand Ferns and Allied Plants. Auckland, David Bateman
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
NZPCN Fact Sheet citation
Please cite as: de Lange, P.J. (Year at time of access): Hymenophyllum scabrum Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/hymenophyllum-scabrum/ (Date website was queried)