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: RR
Previous conservation statuses
2009 | At Risk – Naturally Uncommon | Qualifiers: OL
2004 | Range Restricted
Endemic. Red Hills (Wairau) and Mt Dun. An ultramafic endemic.
Subalpine to alpine (> 1000 m a.s.l.). usually found in open stony ultramafic talus slopes, scree and in open wind ablated clay and loess pans within Chionochloa defracta Connor tussock grassland. Also frequently found on old mine tailings near the copper workings on Mt Dun.
Tufted to compact, reddish-green to dark-green, perennial herb of open ultramafic rock and soil habitats. Petiole up to 40 mm long, narrow, rosette leaves 40 x 4 mm, dark green to red-green, spathulate, obtuse to retuse, apiculate; indumentum of copious to sparse short, straight, appressed, non-overlapping hairs above, similar, sparse, glabrescent to glabrous below. Lateral branches ascending to erect, 80-150 mm long, leafless below inflorescence, lower internodes < leaves. Cauline leaves 15 x 3 mm, narrowly elliptic, subacute, sessile to subsessile; upper surface with longer, softer hairs than seen on rosette-leaves, those on the margins longer, undersides clad in sparse short, stiff, hairs. Inflorescence cymose, cymes 10-20 mm long, usually bifid, ebracteate, (1-)5-20-flowered, internodes short, pedicels wanting. Calyx 5 mm long, cleft with lobes to almost half of length, these rather broad, subacute; hairs on lobes stiff, straight, appressed. Corolla 6 mm diameter, yellow, tube 5 mm, narrow, flaring slightly at mouth, scales at tube mouth narrow and raised, lobes 3 x 3 mm, narrowly ovate; filaments 8-12(or more) mm long, strongly exserted, and positioned well above corolla, anthers 1 mm, yellow; style 10-12 mm long, stigma capitate. Nutlets 2.3-2.5 x 1.1-1.3 mm, black, ovate, apex rounded; base rounded or truncate.
Morphologically close to the North Island endemic M. saxosa Hook.f. which is a species of calcareous not ultramafic substrates, with hoary grey-green rather than sparsely to densely hairy (not hoary) dark-green to red-green, spathulate rather than usually broadly-ovate to obovate leaves, and white rather than yellow flowers.
November - April
February - June
Difficult. Best grown in a pot or in a sunny situation, planted within a magnesium enriched, free draining soil. Keep free from other competiting plants.
Not threatened. This species qualifies as Range Restricted because it is a narrow range, ultramafic endemic. It is locally common within its only known habitats which due to the substrate toxicity are largely, naturally free of weeds.
monroi: Named after Sir David Monro who was a 19th century New Zealand politician
Where To Buy
Not commercially available
Fact Sheet prepared of 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.
NZPCN Fact Sheet citation
Please cite as: de Lange, P.J. (Year at time of access): Myosotis monroi Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/myosotis-monroi/ (Date website was queried)