The New Zealand Plant Conservation Network

Species

Didymodon calycinus

Common Name(s)

Moss

Current Conservation Status

2009 - Threatened - Nationally Critical

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 - Threatened - Nationally Critical

Qualifiers

2009 - De, DP

Authority

Didymodon calycinus Dixon

Family

Pottiaceae

Flora Category

Non Vascular - Native

Synonyms

None

Distribution

Endemic. North Island, Pureora, Wairarapa

Features

Colonial, terricolous, dark green moss. Stems c.10 mm tall (or less), simple or branched. Leaves 1.00-1.25 mm long, when dry appressed and weakly twisted, with curved apices, suberect to spreading when moist; lamina base long, broadly oblong or ovate (up to 0.4 mm wide), narrowly ligulate, with an obtuse apex; margins entire, recurved throughout, except towards the apex. Nerve very strong, about 100 microns wide at the base, failing below the apex. Cells above 8-10 microns, subquadrate, incrassate, smooth and pellucid; those at the base rectangular, about 20 microns long, with rather firm walls. Perichaetium sheathing, with the inner bracts much longer than the leaves. Seta 10.0-12.5 mm long, slender, red, slightly flexuose. Capsule 10-15 mm long, oblong or cylindrical, brown. Peristome dark-brown with 16 teeth; divided completely into two filiform, scarcely auriculate, minutely papillose crurae, ad united at the base into a well-developed, closely and strongly auriculate, basal membrane.

Fruiting

Spring to Summer (exact fruiting period unknown)

Threats

Known from very few collections. Highly threatened by habitat loss, weeds and human traffic (trampling). Vulnerable to plant collectors.

This page last updated on 25 Oct 2011