Haplomitrium minutum
Common name
Liverwort
Synonyms
Stereomitrium minutum E.O.Campb., Haplomitrium hookeri var. minutum (E.O.Campb.) Bartholomew-Began
Family
Haplomitriaceae
Flora category
Non-vascular – Native
Structural class
Liverworts
NVS 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.
HAPMIN
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 | Data Deficient
Distribution
Endemic. South Island. Christchurch, Cashmere Bowling Club Green – exact wild source of these plants unknown
Detailed description
Plants variable, the leafy shoots anisophyllous or feebly so (leaves of one row may be somewhat narrower), arising from a prostrate, branched colourless rhizome; rhizomatous system covered by mucilaginous sheath; leafy shoots erect, unbranched above, yellow-green to green, to 3 mm high. Leaves transversely inserted c.1.4 x 2.0 mm unistratose except for 2-3-stratose median-basal field,the shape variable (even on one shoot); often ovate to narrowly elliptic to linear or occasionally orbicular to subrhomboidal; apices narrowly rounded to bluntly acute to subacuminate, sometimes with a few sessile slime papillae; margins mostly entire, sporadically with 1-2 blunt teeth, the margins with a few sessile slime papillae; cells in median sector 24-36 × 38-55 micrometre; oil-bodies mostly 11-21 per cell, finely granular, ellipsoidal, 2.6 × 4.0 micrometre. Plants dioecious. Androecial plants with antheridia numerous in a terminal cluster or loosely scattered on stem: some axillary (and then up to 5 in an ill-defined zone and not restricted to bract axils), others freestanding; antheridia golden, the stalk massive, 6-8 cells high; axillary antheridia often accompanied by a slime cell at summit of a stalk of c.4 cells, other slime cells on a unicellular stalk and inconspicuous, the axillary antheridia occasionally accompanied by narrowly attenuate scales. Gynoecial shoots (fertilised) with leaves abruptly enlarged toward summit, linear to narrowly ovate toward shoot base, the crowded bracts at the summit of shoot a mixture of highly diverse shapes: innermost ones elongate-narrowly elliptical to lanceolate, these surrounded by a rosette of large ones that are subrotund to broadly obovate but abruptly narrowing distally and forming a broadly apiculate to rounded projection; bract margins smooth, never repand-dentate. Sporophyte protective device a true calyptra, the calyptra translucent, smooth, unistratose (at least distally), the cells leptodermous. Capsule oblong, the wall delicate, uniformly unistratose, 28-32 micrometre thick, formed of irregularly orientated (not tiered), oblong to linear cells usually with somewhat oblique end-walls, the cells with exceedingly thin, hyaline walls, in cross section cells convex on both free sides; cells 15-18 × 38-72 micrometre, each with a single (rarely two) longitudinal, brownish, narrow (2.0-2.4 micrometre wide) thickening band in form of an elongated complete ring, or sometimes incomplete at the ends. Spores 23-32 micrometre, brown, the spore wall verruculate, verruculae sparingly fused. Elaters 1-spiral, becoming bispiral at tips.
Fruiting
Times not known
Threats
Known only from cultivated material which was inadvertantly thrown out. Presumably it exists in a wild state but so far no one has found a wild population.
Substrate
Terricolous amongst Leptinella dioica and L. mainototo