# Myosotis glauca

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Species of flowering plant

Myosotis glauca Myosotis glauca plant, fruiting Conservation status Nationally Vulnerable (NZ TCS)[1] Scientific classification Kingdom: Plantae Clade: Embryophytes Clade: Tracheophytes Clade: Spermatophytes Clade: Angiosperms Clade: Eudicots Clade: Asterids Order: Boraginales Family: Boraginaceae Genus: Myosotis Species: M. glauca Binomial name Myosotis glauca G.Simpson & J.S.Thomson) de Lange & Barkla[2] Synonyms Myosotis pygmaea var. glauca G.Simpson & J.S.Thomson

***Myosotis glauca*** is a species of [flowering plant](/source/Flowering_plant) in the [family](/source/Family_(taxonomy)) Boraginaceae, [endemic](/source/Endemic_species) to the [South Island](/source/South_Island) of [New Zealand](/source/New_Zealand). [George Simpson](/source/George_Simpson_(botanist)) and J.S. Thomson described *M. pygmaea* var. *glauca* in 1942, and [Peter de Lange](/source/Peter_James_de_Lange) and John Barkla recognized it at species rank in 2010. Plants of this species of [forget-me-not](/source/Forget-me-nots) are [perennial](/source/Perennial_plant) with a prostrate habit, bracteate inflorescences, white corollas, and often [glaucous](/source/Glaucous) grey leaves.

## Taxonomy and etymology

*Myosotis glauca* (G.Simpson & J.S.Thomson) de Lange & Barkla is in the plant family [Boraginaceae](/source/Boraginaceae), was originally described as *M. pygmaea* var. *glauca* in 1942 by [George Simpson](/source/George_Simpson_(botanist)) and J.S. Thomson, and was later recognized at species rank by [Peter de Lange](/source/Peter_James_de_Lange) and John Barkla in 2010.[3][4][5][2] In the most recent taxonomic revision, it is continued to be recognized at the species level, and is morphologically most similar to the other bracteate-prostrate species endemic to New Zealand in the pygmy subgroup, i.e. *Myosotis brevis* and *M. antarctica.*[6] *Myosotis glauca* differs from these two species in its straight, appressed trichomes and (usually) glaucous grey leaves.[6][7]

The lectotype specimen of *Myosotis glauca* was designated by [Lucy Moore](/source/Lucy_Moore_(botanist)) and is lodged at the Allan Herbarium (CHR) of [Manaaki Whenua – Landcare Research](/source/Manaaki_Whenua_%E2%80%93_Landcare_Research) (CHR 75722).[8] There is an isolectotype at the [Auckland War Memorial Museum](/source/Auckland_War_Memorial_Museum) (AK 210591).[9]

The [specific epithet](/source/Specific_epithet), *glauca*, is derived from Latin and refers to the dull greyish-green [glaucous](/source/Glaucous) leaves of species.

## Phylogeny

*Myosotis glauca* was shown to be a part of the [monophyletic](/source/Monophyletic) southern hemisphere lineage of *Myosotis* in [phylogenetic](/source/Phylogenetics) analyses of standard DNA sequencing markers ([nuclear ribosomal DNA](/source/Ribosomal_DNA) and [chloroplast DNA](/source/Chloroplast_DNA) regions).[10] Within the southern hemisphere lineage, species relationships were not well resolved.[11][10] The one sequenced individual of *M. glauca* usually grouped with another pygmy subgroup species, *M. antarctica* (including *M. drucei*), as well as with the cushion species, *M. uniflora,* among other species.[10] In a study analyzing microsatellite markers developed specifically for the pygmy subgroup of southern hemisphere *Myosotis*, all populations of *M. glauca* cluster together in the different analyses.[12][6][13]

## Description

*Myosotis glauca* plants are single rosettes. The rosette leaves have [petioles](/source/Petiole_(botany)) 2–9 mm long. The rosette leaf blades are 4–17 mm long by 2–7 mm wide (length: width ratio 1.3–3.5: 1), narrowly oblanceolate to broadly obovate, widest at or above the middle, dull greyish-green ([glaucous](/source/Glaucous)) or sometimes bright green, with an [obtuse](/source/Glossary_of_leaf_morphology#obtuse) apex. The upper surface of the leaf is sparsely covered in straight, appressed to patent, antrorse (forward-facing) hairs, whereas the lower surface of the leaf is usually glabrous or with sparsely distributed hairs on the mid vein only. Each rosette has multiple prostrate, bracteate [inflorescences](/source/Inflorescence) that are up to 12 cm long. The cauline leaves are similar to the rosette leaves but decrease in size and become sessile toward the tip. Each inflorescence has up to 19 flowers, each borne on a short [pedicel](/source/Pedicel_(botany)), with a bract. The calyx is 2–3 mm long at flowering and 3–8 mm long at fruiting, lobed to a quarter or half its length, and usually with hairs only along the calyx ribs. The corolla is white, up to 4 mm in diameter, with a cylindrical tube, and small yellow scales alternating with the petals. The anthers are fully included. The four smooth, shiny, nutlets are usually 1.2–1.5 mm long by 0.8–1.2 mm wide and are ovoid in shape.[6]

The chromosome number of *M. glauca* is unknown.

*M. glauca* has *M. australis* type pollen.[14][15]

It flowers during the months September–March and fruits October–April, with the main flowering and fruiting period December–January.[6]

		- Fruiting plant

		- Fruiting plant

		- Pollen grain

## Distribution and habitat

*Myosotis glauca* is a [forget-me-not](/source/Forget-me-not) endemic to the mountains of the South Island of New Zealand. It is mainly found in Otago, but is also known from south Canterbury, from 180–1500 m ASL. *M. glauca* is found in tussock-grassland, turf and the edges of tarns or streams.[6]

## Conservation status

The species is listed as "Threatened - Nationally Vulnerable" on the most recent assessment (2017-2018) under the [New Zealand Threatened Classification](/source/New_Zealand_Threat_Classification_System) system for plants, with the qualifiers "DP" (Data Poor) and "Sp" (Sparse).[1] A recent taxonomic revision recommended maintaining this conservation status, but replacing qualifier "DP" with "RR" (Range Restricted).[6]

## References

1. ^ [***a***](#cite_ref-NZTCS_1-0) [***b***](#cite_ref-NZTCS_1-1) Lange, Peter J. de; Rolfe, Jeremy R.; Barkla, John W.; Courtney, Shannel P.; Champion, Paul D.; Perrie, Leon R.; Beadel, Sarah M.; Ford, Kerry A.; Breitwieser, Ilse; Schönberger, Ines; Hindmarsh-Walls, Rowan (May 2018). ["Conservation status of New Zealand indigenous vascular plants, 2017"](https://www.doc.govt.nz/globalassets/documents/science-and-technical/nztcs22entire.pdf) (PDF). *New Zealand Threat Classification Series*. **22**: 45. [OCLC](/source/OCLC_(identifier)) [1041649797](https://search.worldcat.org/oclc/1041649797).

1. ^ [***a***](#cite_ref-Threatened_plants_of_New_Zealand_2-0) [***b***](#cite_ref-Threatened_plants_of_New_Zealand_2-1) De Lange, Peter J., ed. (2010). [*Threatened plants of New Zealand*](https://catalogue.nla.gov.au/Record/4837096). Christchurch, N.Z: Canterbury University Press. [ISBN](/source/ISBN_(identifier)) [978-1-877257-56-8](https://en.wikipedia.org/wiki/Special:BookSources/978-1-877257-56-8). [OCLC](/source/OCLC_(identifier)) [456176236](https://search.worldcat.org/oclc/456176236).

1. **[^](#cite_ref-:2_3-0)** Moore, L.B. ["Boraginaceae. In 'Flora of New Zealand'. (Ed. HH Allan) Vol. 1, pp. 806–833"](https://floraseries.landcareresearch.co.nz/pages/Taxon.aspx?id=_2dd90ab4-331f-4d49-bb31-b0a843e65931&fileName=Flora%201.xml). *(Government Printer: Wellington, New Zealand) floraseries.landcareresearch.co.nz*. Retrieved 27 April 2022.

1. **[^](#cite_ref-4)** Simpson, George; Thomson, J.S. (1942). ["Notes on Some New Zealand Plants and Descriptions of New Species (No. 2)"](https://paperspast.natlib.govt.nz/periodicals/TPRSNZ1942-72.2.7.3). *Transactions and Proceedings of the Royal Society of New Zealand*. **72**: 21–40. Retrieved 6 July 2022.

1. **[^](#cite_ref-5)** ["Myosotis glauca"](https://www.nzpcn.org.nz/flora/species/myosotis-glauca/). *New Zealand Plant Conservation Network*. Retrieved 6 July 2022.

1. ^ [***a***](#cite_ref-:1_6-0) [***b***](#cite_ref-:1_6-1) [***c***](#cite_ref-:1_6-2) [***d***](#cite_ref-:1_6-3) [***e***](#cite_ref-:1_6-4) [***f***](#cite_ref-:1_6-5) [***g***](#cite_ref-:1_6-6) Prebble, Jessica M.; Symonds, V. Vaughan; Tate, Jennifer A.; Meudt, Heidi M. (5 May 2022). ["Taxonomic revision of the southern hemisphere pygmy forget-me-not group (Myosotis; Boraginaceae) based on morphological, population genetic and climate-edaphic niche modelling data"](https://www.publish.csiro.au/sb/SB21031). *Australian Systematic Botany*. **35** (1): 63–94. [doi](/source/Doi_(identifier)):[10.1071/SB21031](https://doi.org/10.1071%2FSB21031). [ISSN](/source/ISSN_(identifier)) [1446-5701](https://search.worldcat.org/issn/1446-5701). [S2CID](/source/S2CID_(identifier)) [248603363](https://api.semanticscholar.org/CorpusID:248603363).

1. **[^](#cite_ref-7)** Prebble, Jessica M.; Meudt, Heidi M.; Tate, Jennifer A.; Symonds, V. Vaughan (18 March 2018). ["Bolstering Species Delimitation in Difficult Species Complexes by Analyzing Herbarium and Common Garden Morphological Data: A Case Study Using the New Zealand Native Myosotis pygmaea Species Group (Boraginaceae)"](https://www.ingentaconnect.com/content/aspt/sb/2018/00000043/00000001/art00022). *Systematic Botany*. **43** (1): 266–289. [doi](/source/Doi_(identifier)):[10.1600/036364418X697058](https://doi.org/10.1600%2F036364418X697058). [S2CID](/source/S2CID_(identifier)) [90243293](https://api.semanticscholar.org/CorpusID:90243293).

1. **[^](#cite_ref-8)** ["Myosotis glauca"](https://scd.landcareresearch.co.nz/Specimen/CHR%2075722?collection=CHR&searchCollection=CHR&query=CHR%2075722&currentDisplayTab=list&pageNumber=0&sortField=relevance). *scd.landcareresearch.co.nz*. Retrieved 6 July 2022.

1. **[^](#cite_ref-9)** ["Myosotis glauca"](https://www.aucklandmuseum.com/collections-research/collections/record/am_naturalsciences-object-392064?k=ak210591&dept=Botany&c=ecrm%3AE20_Biological_Object&ordinal=0). [Auckland War Memorial Museum](/source/Auckland_War_Memorial_Museum). Retrieved 6 July 2022.

1. ^ [***a***](#cite_ref-:0_10-0) [***b***](#cite_ref-:0_10-1) [***c***](#cite_ref-:0_10-2) Meudt, Heidi M.; Prebble, Jessica M.; Lehnebach, Carlos A. (1 May 2015). "Native New Zealand forget-me-nots (Myosotis, Boraginaceae) comprise a Pleistocene species radiation with very low genetic divergence". *Plant Systematics and Evolution*. **301** (5): 1455–1471. [doi](/source/Doi_(identifier)):[10.1007/s00606-014-1166-x](https://doi.org/10.1007%2Fs00606-014-1166-x). [ISSN](/source/ISSN_(identifier)) [2199-6881](https://search.worldcat.org/issn/2199-6881). [S2CID](/source/S2CID_(identifier)) [14686750](https://api.semanticscholar.org/CorpusID:14686750).

1. **[^](#cite_ref-:3_11-0)** Winkworth, Richard C; Grau, Jürke; Robertson, Alastair W; Lockhart, Peter J (1 August 2002). ["The origins and evolution of the genus Myosotis L. (Boraginaceae)"](https://www.sciencedirect.com/science/article/pii/S1055790302002105). *Molecular Phylogenetics and Evolution*. **24** (2): 180–193. [doi](/source/Doi_(identifier)):[10.1016/S1055-7903(02)00210-5](https://doi.org/10.1016%2FS1055-7903%2802%2900210-5). [ISSN](/source/ISSN_(identifier)) [1055-7903](https://search.worldcat.org/issn/1055-7903). [PMID](/source/PMID_(identifier)) [12144755](https://pubmed.ncbi.nlm.nih.gov/12144755).

1. **[^](#cite_ref-12)** Prebble, Jessica M.; Meudt, Heidi M.; Tate, Jennifer A.; Symonds, V. Vaughan (2019). ["Comparing and co‐analysing microsatellite and morphological data for species delimitation in the New Zealand native Myosotis pygmaea species group (Boraginaceae)"](https://onlinelibrary.wiley.com/doi/10.1002/tax.12096). *Taxon*. **68** (4): 731–750. [doi](/source/Doi_(identifier)):[10.1002/tax.12096](https://doi.org/10.1002%2Ftax.12096). [ISSN](/source/ISSN_(identifier)) [0040-0262](https://search.worldcat.org/issn/0040-0262). [S2CID](/source/S2CID_(identifier)) [208604617](https://api.semanticscholar.org/CorpusID:208604617).

1. **[^](#cite_ref-13)** Prebble, Jessica M.; Tate, Jennifer A.; Meudt, Heidi M.; Symonds, V. Vaughan (9 June 2015). ["Microsatellite markers for the New Zealand endemic Myosotis pygmaea species group (Boraginaceae) amplify across species1"](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4467761). *Applications in Plant Sciences*. **3** (6) apps.1500027. [doi](/source/Doi_(identifier)):[10.3732/apps.1500027](https://doi.org/10.3732%2Fapps.1500027). [ISSN](/source/ISSN_(identifier)) [2168-0450](https://search.worldcat.org/issn/2168-0450). [PMC](/source/PMC_(identifier)) [4467761](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4467761). [PMID](/source/PMID_(identifier)) [26082880](https://pubmed.ncbi.nlm.nih.gov/26082880).

1. **[^](#cite_ref-14)** ["Myosotis glauca pollen"](https://collections.tepapa.govt.nz/topic/10494). *collections.tepapa.govt.nz*. Retrieved 6 July 2022.

1. **[^](#cite_ref-15)** Meudt, HM (1 October 2016). "Pollen morphology and its taxonomic utility in the Southern Hemisphere bracteate-prostrate forget-me-nots (Myosotis, Boraginaceae)". *New Zealand Journal of Botany*. **54** (4): 475–497. [doi](/source/Doi_(identifier)):[10.1080/0028825X.2016.1229343](https://doi.org/10.1080%2F0028825X.2016.1229343). [ISSN](/source/ISSN_(identifier)) [0028-825X](https://search.worldcat.org/issn/0028-825X). [S2CID](/source/S2CID_(identifier)) [89118799](https://api.semanticscholar.org/CorpusID:89118799).

## External links

- [*Myosotis glauca* occurrence data from Australasian Virtual Herbarium](https://avh.ala.org.au/occurrences/search?taxa=myosotis+glauca#tab_mapView)

- Media related to [Myosotis glauca](https://commons.wikimedia.org/wiki/Category:Myosotis_glauca) at Wikimedia Commons

Taxon identifiers Myosotis glauca Wikidata: Q17416555 Wikispecies: Myosotis glauca CoL: 455WG GBIF: 7894901 iNaturalist: 410559 IPNI: 77105112-1 NZOR: 4445f86b-2060-4390-8aa1-6eaeacd3da2d NZPCN: 76 Open Tree of Life: 6062890 POWO: urn:lsid:ipni.org:names:77105112-1 WFO: wfo-0000746772 Myosotis pygmaea var. glauca Wikidata: Q96143006 GBIF: 7605323 IPNI: 77105106-1 NZOR: d3b98842-b6f7-4273-8b8e-a8d7f95bb49a POWO: urn:lsid:ipni.org:names:77105106-1 WFO: wfo-0000746779

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Adapted from the Wikipedia article [Myosotis glauca](https://en.wikipedia.org/wiki/Myosotis_glauca) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Myosotis_glauca?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.