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  4. Myosotis glauca

Myosotis glauca

Myosotis pygmaea var. glauca in cultivation.<br>Photographer: John Barkla, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Myosotis glauca, Nevis.<br>Photographer: John Barkla, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Myosotis pygmaea var. glauca in cultivation.<br>Photographer: John Barkla, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Ngawakaakauae Stream, Waiouru.<br>Photographer: John Barkla, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Myosotis glauca in fruit, Mt St Bathans.<br>Photographer: John Barkla, Date taken: 04/02/2018, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
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Synonyms

Myosotis pygmaea var. glauca G.Simpson et J.S.Thomson

Family

Boraginaceae

Authority

Myosotis glauca (G.Simpson et J.S.Thomson)de Lange et Barkla

Flora category

Vascular – Native

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Structural class

Herbs - Dicotyledons other than Composites

Current conservation status

  • Conservation status of New Zealand indigenous vascular plants, 2017

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 | Threatened – Nationally Vulnerable | Qualifiers: De, DP, Sp

Previous conservation statuses

2009 | Threatened – Nationally Vulnerable | Qualifiers: De, DP, SP

2004 | Threatened – Nationally Endangered

Distribution

Endemic, North and South Islands. In the North Island known from one site in the southern Kaimanawa Range. In the South Island known from widely scattered sites from Canterbury, Central Otago and northern Southland.

Habitat

Open, dry sandy, gravelly ground or clay pans. Often in wind ablated scrapes, and shows a marked preference for base rich substrates. Usually found growing in small patches often in the vicinity of scabweeds. It has also been found growing admist Muehlenbeckia axillaris (Hook.f.) Endl. mats.

Features

Decumbent, biennial or perennial herb, forming small, circular patches on open ground. Rosette rather open, sparsely leafy. Petiole broad 5(-10) mm long. Leaves 10-30 x 5-8 mm, glaucous green or grey, obovate to spathulate, apex obtuse or rounded, rarely subacute, base narrowly cuneate to attenuate; upper surface clad in short, stiff, sparse tightly appressed hairs. Lateral branches few, decumbent, 50-100 mm long, extending well beyond rosette leaves, rather openly branching, internodes 10-15 mm long. Stem leaves similar to rosette-leaves. Bracts up to 8 x 6 mm, rather leafy, obovate. Inflorescences cymose, cymes simple, few- to many-flowered, subtended by leafy bracts throughout, internodes < bracts, often rather short. Pedicels 1.5-2 mm long. Calyx 3-5 mm long, elongating to 4-8 mm long in fruiting material, lobes deeply cut to half calyx length, lobes subacute, hairs few, confined in lines to margins and on vertical lines of calyx, very short, stiff and coarse. Flowers white. Corolla 3 mm diameter, corolla tube cylindric 0.4-0.6 mm, lobes very narrow, apex obtuse; stamens on short filaments, anthers 0.5-0.8 mm, wholly included within corolla tube, anther tips obscured, rarely reaching scales; style 0.1-0.3, stigma capitate. Nutlets 1.2-1.5 x (0.8-)1-1.2 mm, brown-black to grey-black, broadly ovate.

Similar taxa

Myosotis glauca is allied to M. brevis, M. drucei and M. pygmaea. From these species M. glauca can be distinguished by the biennial to perennial habit, glaucous-green to grey leaf colour, the sparse, erect, stiff and short calyx hairs, and by the very broadly ovate nutlets (seeds).

Flowering

(August-) September to December (however sporadic flowering may occur throughout the year)

Flower colours

White

Fruiting

September to January (however fruits may be found throughout the year)

Propagation technique

Easily grown from fresh seed but short-lived and difficult to maintain for any length of time. Dislikes humidity.

Threats

Seriously threatened by weed invasion of the dry, open sites it requires.

Etymology

myosotis: Mouse-eared

glauca: Bloom has thin powder

Where To Buy

Not commercially available.

Comments on taxonomy

Myosotis pygmaea var. glauca was elevated to species rank by de Lange and Barkla in de Lange et al. (2010).

Attribution

Fact Sheet prepared for the NZPCN by P.J. de Lange 14 April 2006. Description by P.J. de Lange and subsequently published in de Lange et al. (2010).

References and further reading

de Lange, P.J.; Heenan, P.B.; Norton, D.A.; Rolfe, J.R.; Sawyer, J.W.D. 2010: Threatened Plants of New Zealand. Canterbury University Press, Christchurch.

NZPCN Fact Sheet citation

Please cite as: de Lange, P.J. (Year at time of access): Myosotis glauca Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/myosotis-glauca/ (Date website was queried)

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