Myosotis glauca – Wikipedia



Species of flowering plant

Myosotis glauca is a species of flowering plant within the circle of relatives Boraginaceae, endemic to the South Island of New Zealand. George Simpson and J.S. Thomson described M. pygmaea var. glauca in 1942, and Peter de Lange and John Barkla identified it at species rank in 2010. Crops of this species of forget-me-not are perennial with a prostrate dependancy, bracteate inflorescences, white corollas, and ceaselessly glaucous gray leaves.

Taxonomy and etymology[edit]

Myosotis glauca (G.Simpson & J.S.Thomson) de Lange & Barkla is within the plant circle of relatives Boraginaceae, used to be at first described as M. pygmaea var. glauca in 1942 by means of George Simpson and J.S. Thomson, and used to be later identified at species rank by means of Peter de Lange and John Barkla in 2010.[3][4][5][6] In the newest taxonomic revision, it’s persevered to be identified on the species stage, and is morphologically maximum very similar to the opposite bracteate-prostrate species endemic to New Zealand within the pygmy subgroup, i.e. Myosotis brevis and M. antarctica.[7]Myosotis glauca differs from those two species in its instantly, appressed trichomes and (in most cases) glaucous gray leaves.[7][8]

The lectotype specimen of Myosotis glauca used to be designated by means of Lucy Moore and is lodged on the Allan Herbarium (CHR) of Manaaki Whenua – Landcare Analysis (CHR 75722)[9]. There’s an isolectotype on the Auckland Warfare Memorial Museum (AK 210591).[10]

The precise epithet, glauca, is derived from Latin and refers back to the uninteresting greyish-green glaucous leaves of species.


Myosotis glauca used to be proven to be part of the monophyletic southern hemisphere lineage of Myosotis in phylogenetic analyses of usual DNA sequencing markers (nuclear ribosomal DNA and chloroplast DNA areas).[11] Inside the southern hemisphere lineage, species relationships weren’t smartly resolved.[12][11] The only sequenced person of M. glauca in most cases grouped with every other pygmy subgroup species, M. antarctica (together with M. drucei), in addition to with the cushion species, M. uniflora, amongst different species.[11] In a learn about inspecting microsatellite markers advanced particularly for the pygmy subgroup of southern hemisphere Myosotis, all populations of M. glauca cluster in combination within the other analyses.[13][7][14]


Myosotis glauca vegetation are unmarried rosettes. The rosette leaves have petioles 2–9 mm lengthy. The rosette leaf blades are 4–17 mm lengthy by means of 2–7 mm extensive (duration: width ratio 1.3–3.5: 1), narrowly oblanceolate to widely obovate, widest at or above the center, uninteresting greyish-green (glaucous) or now and again deliver inexperienced, with an obtuse apex. The higher floor of the leaf is moderately lined in instantly, appressed to patent, antrorse (forward-facing) hairs, while the decrease floor of the leaf is in most cases glabrous or with moderately allotted hairs at the mid vein handiest. Every rosette has more than one prostrate, bracteate inflorescences which might be as much as 12 cm lengthy. The cauline leaves are very similar to the rosette leaves however lower in measurement and develop into sessile towards the end. Every inflorescence has as much as 19 plant life, every borne on a brief pedicel, with a bract. The calyx is two–3 mm lengthy at flowering and three–8 mm lengthy at fruiting, lobed to a 1 / 4 or part its duration, and in most cases with hairs handiest alongside the calyx ribs. The corolla is white, as much as 4 mm in diameter, with a cylindrical tube, and small yellow scales alternating with the petals. The anthers are totally integrated. The 4 easy, glossy, nutlets are in most cases 1.2–1.5 mm lengthy by means of 0.8–1.2 mm extensive and are ovoid in form.[7]

The chromosome choice of M. glauca is unknown.

M. glauca has M. australis sort pollen.[15][16]

It plant life all through the months September–March and culmination October–April, with the principle flowering and fruiting duration December–January.[7]

Distribution and habitat[edit]

Myosotis glauca is a forget-me-not endemic to the mountains of the South Island of New Zealand. It’s principally present in Otago, however may be recognized from south Canterbury, from 180–1500 m ASL. M. glauca is located in tussock-grassland, turf and the perimeters of tarns or streams.[7]

Conservation standing[edit]

The species is indexed as “Threatened – Nationally Susceptible” on the newest evaluation (2017-2018) below the New Zealand Threatened Classification device for vegetation, with the qualifiers “DP” (Knowledge Deficient) and “Sp” (Sparse).[1] A contemporary taxonomic revision really helpful keeping up this conservation standing, however changing qualifier “DP” with “RR” (Vary Limited).[7]


  1. ^ a b 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-Partitions, Rowan (Would possibly 2018). “Conservation standing of New Zealand indigenous vascular vegetation, 2017” (PDF). New Zealand Risk Classification Sequence. 22: 45. OCLC 1041649797.
  2. ^ De Lange, Peter J., ed. (2010). Threatened vegetation of New Zealand. Christchurch, N.Z: Canterbury College Press. ISBN 978-1-877257-56-8. OCLC 456176236.
  3. ^ Moore, L.B. “Boraginaceae. In ‘Flowers of New Zealand’. (Ed. HH Allan) Vol. 1, pp. 806–833”. (Executive Printer: Wellington, New Zealand) Retrieved 27 April 2022.
  4. ^ Simpson, George; Thomson, J.S. (1942). “Notes on Some New Zealand Crops and Descriptions of New Species (No. 2)”. Transactions and Complaints of the Royal Society of New Zealand. 72: 21–40. Retrieved 6 July 2022.
  5. ^ “Myosotis glauca”. New Zealand Plant Conservation Community. Retrieved 6 July 2022.
  6. ^ De Lange, Peter J., ed. (2010). Threatened vegetation of New Zealand. Christchurch, N.Z: Canterbury College Press. ISBN 978-1-877257-56-8. OCLC 456176236.
  7. ^ a b c d e f g Prebble, Jessica M.; Symonds, V. Vaughan; Tate, Jennifer A.; Meudt, Heidi M. (5 Would possibly 2022). “Taxonomic revision of the southern hemisphere pygmy forget-me-not workforce (Myosotis; Boraginaceae) in keeping with morphological, inhabitants genetic and climate-edaphic area of interest modelling information”. Australian Systematic Botany. 35 (1): 63–94. doi:10.1071/SB21031. ISSN 1446-5701.
  8. ^ Prebble, Jessica M.; Meudt, Heidi M.; Tate, Jennifer A.; Symonds, V. Vaughan (18 March 2018). “Bolstering Species Delimitation in Tough Species Complexes by means of Inspecting Herbarium and Not unusual Lawn Morphological Knowledge: A Case Find out about The usage of the New Zealand Local Myosotis pygmaea Species Workforce (Boraginaceae)”. Systematic Botany. 43 (1): 266–289. doi:10.1600/036364418X697058.
  9. ^ “Myosotis glauca”. Retrieved 6 July 2022.
  10. ^ “Myosotis glauca”. Retrieved 6 July 2022.
  11. ^ a b c Meudt, Heidi M.; Prebble, Jessica M.; Lehnebach, Carlos A. (1 Would possibly 2015). “Local New Zealand forget-me-nots (Myosotis, Boraginaceae) contain a Pleistocene species radiation with very low genetic divergence”. Plant Systematics and Evolution. 301 (5): 1455–1471. doi:10.1007/s00606-014-1166-x. ISSN 2199-6881.
  12. ^ Winkworth, Richard C; Grau, Jürke; Robertson, Alastair W; Lockhart, Peter J (1 August 2002). “The origins and evolution of the genus Myosotis L. (Boraginaceae)”. Molecular Phylogenetics and Evolution. 24 (2): 180–193. doi:10.1016/S1055-7903(02)00210-5. ISSN 1055-7903.
  13. ^ Prebble, Jessica M.; Meudt, Heidi M.; Tate, Jennifer A.; Symonds, V. Vaughan (2019). “Evaluating and co‐analysing microsatellite and morphological information for species delimitation within the New Zealand local Myosotis pygmaea species workforce (Boraginaceae)”. TAXON. 68 (4): 731–750. doi:10.1002/tax.12096. ISSN 0040-0262.
  14. ^ 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 workforce (Boraginaceae) magnify throughout species1”. Programs in Plant Sciences. 3 (6): apps.1500027. doi:10.3732/apps.1500027. ISSN 2168-0450. PMC 4467761. PMID 26082880.
  15. ^ “Myosotis glauca pollen”. Retrieved 6 July 2022.
  16. ^ Meudt, HM (1 October 2016). “Pollen morphology and its taxonomic application within the Southern Hemisphere bracteate-prostrate forget-me-nots (Myosotis, Boraginaceae)”. New Zealand Magazine of Botany. 54 (4): 475–497. doi:10.1080/0028825X.2016.1229343. ISSN 0028-825X.

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