Didymodon calycinus
Common name
Moss
Synonyms
None
Family
Pottiaceae
Flora category
Non-vascular – Native
Current conservation status
- Conservation status of New Zealand mosses, 2014 (PDF, 583.87 kB)
The conservation status of 109 New Zealand moss taxa was assessed using the New Zealand Threat Classification System (NZTCS). Four taxa and one undescribed entity that were not included in previous assessments have been added to the list. The conservation status of only two taxa has changed in this assessment. A full list is presented, along with a statistical summary and brief notes on the changes. This list replaces all previous NZTCS lists for mosses. Authors: Jeremy R. Rolfe, Allan J. Fife, Jessica E. Beever, Patrick J. Brownsey and Rodney A. Hitchmough.
- Conservation status of New Zealand hornworts and liverworts, 2014 (PDF, 695.44 kB)
The conservation status of the New Zealand hornwort and liverwort flora is reassessed using the New Zealand Threat Classification System (NZTCS). A full list is presented, along with a statistical summary and brief notes on the most important changes. This list replaces all previous NZTCS lists for New Zealand hornworts and liverworts which previously had been part of a generic bryophyte conservation status assessment that included mosses. Authors: Peter J. de Lange, David Glenny, John Braggins, Matt Renner, Matt von Konrat, John Engel, Catherine Reeb and Jeremy Rolfe.
Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.
2009 | Threatened – Nationally Critical | Qualifiers: De, DP
Previous conservation status
2004 | Threatened – Nationally Critical
Distribution
Endemic. North Island, Pureora, Wairarapa
Detailed description
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.
Substrate
Terrestrial on damp soil within indigenous forest
References
Sainsbury, G.O.K. 1955: A handbook of the New Zealand mosses. Royal Society of New Zealand Bulletin 5.
Fact Sheet Prepared for NZPCN by: P.J. de Lange (1 June 2007). Description adapted from Sainsbury (1955)