Racomitrium crumianum
Common name
Moss
Synonyms
None (first described 1984)
Family
Grimmiaceae
Flora category
Non-vascular – Native
Structural class
Mosses
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 | Range Restricted
Distribution
Endemic. South island, north-west Nelson, where it is found mainly within Kahurangi National Park
Detailed description
Saxicolous, yellowish or brownish-green tufted moss inhabiting moist granite. Stems up to 20 mm long, weakly creeping or upright, sparsely branched near base, reddish-brown, in cross-section more or less triangular, lacking a central strand, with firm-walled cells surrounded by 2-4 layers of isodiametric, very incrassate cortical cells. leaves imbricate and fragile, c.3 mm long, lanceolate, lacking a hair point, with apices nearly always broken, when dry with lower portions erect and the upper portions strongly circinate-reflexed, when moist erect-spreading and more or less straight, carinate throughout with a single plica extending from base well into the apex; margins strongly reflexed on one side, plane or nearly so on the other; nerve c.20 microns wide at base ending in acumen, in cross-section of 2 layers of cells throughout; lamina unistratose; cells thick-walled, smooth, and strongly nodulose throughout (except within 100 microns of apex), in lower portion of lamina very elongate, c.45-65 x c.6 microns, in median portion of lamina 18-30 microns long, and in uppermost fragile portion of leaf c.9-15 microns and quadrate to shortly rectangular; alar cells weakly differentiated, shorter, less nodose and more pigmented than adjacent laminal cells; marginal cells at base smooth-walled and forming a distinct border c.15 cells high; marginal cells in upper half of leaf longer than adjacent laminal cells, with incrassate, smooth walls and forming a distinct, uniseriate or biseriate, mostly unistratose border which extends to the leaf apex. Axillary hairs c.105 microns (6 cells) long (seemingly one in each alar angle). Sex organs and sporophyte not seen.
Fruiting
Fruits not known
Threats
Not Threatened. Listed because it isd a narrow range endemic known from only a few small populations
Substrate
Saxicolous on moist granitic boulders and rock outcrops. Montane to alpine.