Hymenophyllum: Membranous leaf, from the Greek humen and phullon
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
Hymenophyllum minimum A. Rich.
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.
Mecodium minimum (A. Rich.) Copel.; Hymenophyllum pygmaeum Colenso
Endemic. North, South, Stewart, Chatham, Antipodes, Campbell Auckland Islands. From the upper Kauaeranga Valley (near Thames) and Mt Pirongia south.
Coastal to montane (usually montane in northern part of range). A common species of shaded rock faces, cliffs, overhangs, and boulder and talus slopes - sometimes in places subjected to salt spray. Often in rather open sites and in places that often dry out for protracted periods of time. Very rarely found growing as an epiphyte.
Diminutive, compact, dense turf-forming fern. Rhizomes long-creeping, very slender and thin, much branched and interwoven. Fronds bright emerald green. Stipes 3-8 mm long, very thin; stipes and rachises not winged, glabrous. Laminae round to elliptic, pinnate, 5-15 × 5-10 mm, glabrous. Pinnae in 1-5 pairs, margins prominently toothed. Sori solitary and terminating rachis, pedunculate. Indusial flaps toothed, abaxially spiny. Description adapted from Brownsey & Smith-Dodsworth (2000).
Recognised by its small stature, bright green colour, prominently toothed pinnae, solitary, stalked (pedunculate) sori terminating the rachises, and by the toothed indusial flaps whose outer (abaxial) surfaces are covered in spines.
Difficult - should not be removed from the wild.
Life Cycle and Dispersal
Minute spores are wind dispersed (Thorsen et al., 2009).
Where To Buy
Not commercially available
Fact Sheet Prepared for NZPCN by P.J. de Lange (18 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
This page last updated on 23 Jan 2017