Acromastigum marginatum


marginatum: From the Latin marginatus 'edge, margin', where one colour is surrounded by a very narrow rim of another

Common Name(s)


Current Conservation Status

2009 - 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

2004 - Sparse


Acromastigum marginatum E.A.Hodgs.



Flora Category

Non Vascular - Native

NVS Species Code


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



Not Threatened


Plants bright green when fresh, paling to fawn, loosely intricate in a depressed mat. Stems to 20 mm., branched at an angle somewhat less than a right angle, branches simple or forked, mostly bearing 1–2 flagelliform branches, to 5 mm. long and 0.1 mm. broad, with minute closely appressed bifid leaves. Leaves imbricate, very regular, with a narrow hyaline margin all round, narrow ovate 0.35–0.40 mm long × c. 0.20 mm. broad, oblique, ventral margin convex, dorsal margin nearly straight; bilobed, the ventral lobe the larger, triangular, subacute, 0·1 mm. long, to 0.1 mm. broad at base (ca. 5 cells), inclined towards the apex of the stem; dorsal lobe reduced to a tooth or a crenation. Stipules imbricate, medium to comparatively large, subcircular, to 0.2 mm. wide, divided from 1/3-½ into 3 obtuse or acute lobes Cells 10–12 microns, more or less in rows and fairly uniform except in basal area somewhat nearer to the ventral margin than to the dorsal, where they may reach to 18 micrometres. Cuticle minutely papillose showing along the margin of the leaves. No inflorescences seen.

Endemic Taxon


Endemic Genus


Endemic Family



Fact Sheet Prepared for NZPCN by P.J. de Lange 31 August 2007.

This page last updated on 22 Aug 2013