Plagiochila hatcheri
Common name
Liverwort
Synonyms
None (first described in 1999)
Family
Plagiochilaceae
Flora category
Non-vascular – Native
Endemic taxon
Yes
Endemic genus
No
Endemic family
No
Structural class
Liverworts
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 | Qualifiers: OL
Previous conservation status
2004 | Threatened – Nationally Critical
Distribution
Endemic. Stewart Island: Ulva Island (Patersons Inlet)
Detailed description
Pale yellowish brown plants with erect leafy shoots arising from a horizontal leafless axis; shoots medium, to 2.8 mm wide. Branching frequent, the branches all lateral-intercalary, innovations mostly from axis of involucral leaves; stolons at times arising from near bases of branches. Stems wiry, pale brown, cortical cells in 3-4 layers. Leaves widely spreading, often at right angles to stem, slightly ventrally second, more or less horizontal; leaves broadly and asymmetrically ovate, widest subbasally; apex rounded to subacute, sharply toothed, teeth not notably larger than those of ventral margin; dorsal margin narrowly and sharply recurved, more or less straight, with 1 or more shaprt teeth in distal half, becoming narrowly revolute at base and filling insertion; ventral; margin moderately curved in distal portion, distinctly ampliate at base, toothed to the apex, the base truncate, entire, shortly decurrent. Marginal teeth coarse, narrowly acuminate from broad base, 2-3 cells wide at base, the uniseriate row 3-5 cells long. Underleaves vestigial consisting of 1 or more filiform cell clusters. Cells of median portion of leaf with trigones everywhere very large, strongly nodulose-triradiate, lumen syrrounded by trigones with intervening thin-walled places, cells more or less isodiametirc, 22-99 x 24-30 microns; median basal cells larger and elongated, forming a short , broad basal field; leaf margins without differentiated border, wall thickenings similar to those of median cells, cuticle smooth. Male plants not seen. Gynoecia at apices of main shoot and lateral-intecalary branches; bracts of innermost series asymmetrically narrowly ovate, the dorsal margin entire or with a tooth near the apex, ventral margin with larger teeth like those of leaves. Perianth obovate, broadest at mouth; mouth broadly rounded, laciniata, the teeth crowded, slenderly acuminate to subcaudate, ending in a uniseriate row of up to 6 cells long. Sporophytes not seen.
Fruiting
Unknown
Threats
Plagiochila hatcheri is still only known only from the type gathering which came from Ulva Island a secure Nature Reserve. It has not been seen there recently.
Substrate
Terricolous amongst mosses in lowland coastal forest
Fact Sheet Prepared for NZPCN by: P.J. de Lange 3 January 2009.