Vascular – Native
Herbs - Dicotyledons other than Composites
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.
Current conservation status
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2017 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2012 and replaces all previous NZTCS lists for vascular plants. Authors: By Peter J. de Lange, Jeremy R. Rolfe, John W. Barkla, Shannel P. Courtney, Paul D. Champion, Leon R. Perrie, Sarah M. Beadel, Kerry A. Ford, Ilse Breitwieser, Ines Schönberger, Rowan Hindmarsh-Walls, Peter B. Heenan and Kate Ladley.
2012 | At Risk – Naturally Uncommon | Qualifiers: DP, Sp
Previous conservation statuses
2009 | At Risk – Naturally Uncommon
2004 | Data Deficient
Endemic. South Island. Eastern from Canterbury to Central Otago.
Montane to subalpine. Favouring stony and shingle river beds, flats and consolidated moraines.
Much-branched tufted perennial herb arising from a long stout central woody taproot. Plants forming compact rounded cushion up to 100 mm diameter. Stems 10-50 mm long, c.5 mm diameter, crowded, ± erect, closely covered with imbricating leaves. Leaves c.5 mm long; base 1.5 mm. wide, membranous, sheathing, fringed with long hairs; lamina narrower, triangular to subulate, ± concave, apex subacute; hairs stiff, appressed, ± overlapping. Flowering branchlets short, not projecting above cushion, their leaves lacking the broad base but otherwise similar to lower leaves. Calyx c.3 mm long, lobes c. 1/2 length, rather broad, subacute, glabrous within, the whole calyx covered outside with uniform stiff appressed overlapping hairs. Corolla yellow fading to white with age, 4-5 mm diameter, tube 5 mm long, long-cylindric, lobes c.2 × 2 mm, rotund, flat; filaments short, anthers 1.5 mm long, tips protruding just above rather large scales; style 2-3× calyx, stigma capitate. Nutlets dark, up to 2.0 × 1.5 mm.
A very distinct species unlikely to be confused with any other Myosotis, and unique in its preference for stony river beds. In the field this species is easily recognised by the dark green cushions it forms, by the closely packed stems and narrow leaves, and when flowering by the conspicuous yellow flowers.
September to November
November to January
Difficult - should not be removed from the wild. This species can be grown in an alpine house but it is difficult to maintain.
Myosotis uniflora is an uncommon, mostly sparsely distributed species occupying habitats that are becoming increasingly vulnerable to weed invasion, or used for viticulture. If these trends continue then it is likely that M. uniflora will eventually be listed at some of level of threat.
Fact Sheet prepared for NZPCN by P.J. de Lange (1 February 2008). Description based on Allan (1961).
References and further reading
Allan, H.H. 1961: Flora of New Zealand. Vol. I. Goverment Printer, Wellington.
Please cite as: de Lange, P.J. (Year at time of access): Myosotis uniflora Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/myosotis-uniflora/ (Date website was queried)