Filmy fern, Piripiri
Mecodium sanguinolentum (G. Forst.) C. Presl; Trichomanes sanguinolentum G.Forst.; Hymenophyllum polyanthos var. sanguinolentum (G.Forst.) Hook. ex Hook.f.; Hymenophyllum sanguinolentum var. lophocarpum (Colenso) Domin; Hymenophyllum polyanthos sensu Raoul; Sphaerocionium sanguinolentum (G.Forst.) C.Presl; Hymenophyllum cristulatum Rosenst.; Hymenophyllum lophocarpum Colenso
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
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
Indigenous. New Zealand; Three Kings, North, South, Stewart Islands. Also Cook Islands (Rarotonga). Previously regarded as endemic to New Zealand, Hymenophyllum sanguinolentum was discovered on Rarotonga in July 2010.
Coastal to subalpine. A very common and widespread species of closed or open forest and shrub-land. Also a common species of shaded canyon walls, cliff faces, rock tors, boulder-field and talus slopes. Hymenophyllum sanguinolentum is extremely drought resistant and as such one of the few filmy ferns to grow within drought-prone habitats.
Terrestrial or epiphytic fern forming dense patches on suitable substrates. Rhizomes long-creeping, slender. Frond dark green, strongly aromatic, scent somewhat sanguinely metallic (especially when dry). Stipes 20-90 mm long, slender; stipes and rachises sparsely hairy especially toward and at base, narrowly winged for most of length, black, wing often zig-zagged in upper portion. Laminae 50-250(-300) × 30-120 mm, ovate, elliptic to elliptic-deltoid, 3-4-pinnate, glabrescent. Ultimate segments 8-12 mm wide, oblong, margins entire though often slightly undulose toward distal portion of frond. Sori on short branches in distal portion of frond, many borne on each primary pinna. Indusium ovoid to ovoid-elliptic, abaxially crested by 3(-5) longitudinal ridges; indusial flaps entire. Receptacle included.
Easily distinguished when fertile by the crest backs of the indusium. Sterile material can be recognised by the black zig-zagged rachis wing and smooth pinna margins. Sodden or dried material smells strongly like dried blood (or as some people sense it like wet rusted iron). Pressed specimens stain paper yellow-brown or dark brown. Hymenophyllum sanguinolentum is very similar to H. villosum. Hymenophyllum villosum is restricted to upper montane and subalpine habitats but it may be found growing with H. sanguinolentum. From that species H. villosum differs by its hairy lamina and ellipsoid indusia whose abaxial surfaces are smooth, never crested like those of H. sanguinolentum.
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
sanguinolentum: Smelling like blood; from the Latin sanguis and olere; fern’s smell especially when dried
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
Please cite as: de Lange, P.J. (Year at time of access): Hymenophyllum sanguinolentum Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/hymenophyllum-sanguinolentum/ (Date website was queried)