Myosotis eximia

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Myosotis eximia
Myosotis eximia Flowers MRD Otari.jpg
Status NZTCS NU.svg
Naturally Uncommon (NZ TCS) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Boraginales
Family: Boraginaceae
Genus: Myosotis
Species:
M. eximia
Binomial name
Myosotis eximia

Myosotis eximia is a species of flowering plant in the family Boraginaceae endemic to the North Island of New Zealand. The species was described by Donald Petrie. Plants of this species of forget-me-not are perennial and erect, and have ebracteate inflorescences with white corollas.

Contents

Taxonomy and Etymology

Myosotis eximia Petrie is in the plant family Boraginaceae and was originally described in 1915 by Donald Petrie. [3] [2] [4] This species was first collected in December 1914 by Bernard Aston on the slopes of Mt Aorangi, in the Ruahine Ranges, where it formed "continuous patches several feet across, adorned by masses of lovely flowers." at an altitude of 3,900 feet (1,200 m). [2] The species epithet, eximia, means "strikingly unusual". [3]

Phylogeny

Myosotis eximia was shown to be a part of the monophyletic southern hemisphere lineage of Myosotis in phylogenetic analyses of standard DNA sequencing markers (nuclear ribosomal DNA and chloroplast DNA regions). [5] Within the southern hemisphere lineage, species relationships were not well resolved. [5] The chloroplast sequences of the sole individual of M. eximia were more similar to some species with bracteate inflorescences rather than other North Island species with ebracteate inflorescences. [5]

Description

Myosotiseximia is an extensively-branched spreading perennial, which forms clusters of tight rosettes with erect, ebracteate flowering stems. [3] The leaves are sparsely covered in dense, straight hairs that lie flat against the leaf. M. eximia flowers in December and January; its flowers, which Petrie described as "large and showy, white with a yellow eye", [2] have projecting anthers. The anthers are only 2 mm long, much shorter than their filaments. [3]

The chromosome number of M. eximia is 2n = 44. [6]

It flowers from December to January and fruits from February to April. [3]

Distribution and habitat

The species is endemic to New Zealand, and has a very restricted distribution, known only from the Kaimanawa and Ruahine Ranges in the central North Island. [3] It lives in the subalpine to alpine zone, on scree slopes and limestone bluffs. [3] It prefers alkaline soils on limestone or calcareous sandstone. [3]

Conservation status

Myosotis eximia growing in cultivation at Otari-Wilton's Bush. Myosotis eximia MRD Otari.jpg
Myosotis eximia growing in cultivation at Otari-Wilton's Bush.

M. eximia is listed by the Department of Conservation as "At Risk – Naturally Uncommon" on the most recent assessment (2017-2018) of the New Zealand Threat Classification for plants. [1] Its numbers are thought to be stable, with the qualifiers "DP" (Data Poor) and "RR" (Range Restricted). [7] Because of its specialised habitat requirements, its populations are small and localised, but do not seem to be under threat. [3]

Cultivation

This species grows surprisingly well in gardens, preferring soil with some added lime, and is often for sale in native plant nurseries. It needs a sunny, well drained situation, and will flower heavily even in warm climates far from its natural subalpine habitat. [3]

Related Research Articles

<i>Myosotis pansa <span style="font-style:normal;">subsp.</span> pansa</i> Species of flowering plant

Myosotis pansa subsp. pansa, also known as the Waitakere forget-me-not, is a subspecies of flowering plant in the family Boraginaceae, endemic to the North Island of New Zealand. Lucy Moore described the variety M. petiolata var. pansa in 1961, and it was transferred to a subspecies of M. pansa by Heidi Meudt, Jessica Prebble, Rebecca Stanley and Michael Thorsen in 2013. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas with exserted stamens.

<i>Myosotis monroi</i> Species of flowering plant

Myosotis monroi is a species of flowering plant in the family Boraginaceae endemic to the South Island of New Zealand. The species was described by Thomas Cheeseman. Plants of this species of forget-me-not are perennial and erect, and have ebracteate inflorescences with cream or white corollas.

<i>Myosotis albosericea</i> Species of flowering plant

Myosotis albosericea is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Joseph Dalton Hooker described the species in 1867. Plants of this species of forget-me-not are perennial rosettes which form loose clumps, with ebracteate, erect inflorescences, and yellow corollas.

<i>Myosotis concinna</i> Species of flowering plant

Myosotis concinna is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Thomas Cheeseman described the species in 1885. Plants of this species of forget-me-not are large, perennial rosettes which form loose tufts or clumps, with ebracteate, erect inflorescences, and yellow corollas.

<i>Myosotis rakiura</i> Species of flowering plant

Myosotis rakiura is a species of flowering plant in the family Boraginaceae, endemic to southern South Island and Stewart Island/Rakiura of New Zealand. Joseph Beattie Armstrong described the species in 1881. Plants of this species of forget-me-not are perennial rosettes which form loose tufts or clumps, with ebracteate, erect inflorescences, and white corollas with exserted stamens.

<i>Myosotis brockiei</i> Species of flowering plant

Myosotis brockiei is a species of flowering plant in the family Boraginaceae, endemic to southern South Island of New Zealand. Lucy Moore and Margaret Simpson described the species in 1973. Plants of this species of forget-me-not are perennial rosettes which form loose tufts or clumps, with ebracteate, erect inflorescences, and white corollas with exserted stamens.

<i>Myosotis brockiei <span style="font-style:normal;">subsp.</span> brockiei</i> Species of flowering plant

Myosotis brockieisubsp. brockiei is a subspecies of flowering plant in the family Boraginaceae, endemic to southern South Island of New Zealand. Lucy Moore and Margaret Simpson described M. brockiei in 1973. Plants of this subspecies of forget-me-not are perennial rosettes which form caespitose tufts or clumps, with ebracteate, erect inflorescences, and white corollas with exserted stamens.

<i>Myosotis goyenii</i> Species of flowering plant

Myosotis goyenii is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Donald Petrie described the species in 1891. Plants of this species of forget-me-not are perennial rosettes which form loose tufts or clumps, with ebracteate, erect inflorescences, and white corollas with partly exserted or fully included stamens.

<i>Myosotis goyenii <span style="font-style:normal;">subsp.</span> goyenii</i> Species of flowering plant

Myosotis goyeniisubsp. goyenii is a subspecies of flowering plant in the family Boraginaceae, endemic to southern South Island of New Zealand. Donald Petrie described the species M. goyenii in 1891. Plants of this subspecies of forget-me-not are perennial rosettes which form loose clumps, with ebracteate, erect inflorescences, and white corollas with partly exserted stamens.

<i>Myosotis goyenii <span style="font-style:normal;">subsp.</span> infima</i> Species of flowering plant

Myosotis goyeniisubsp. infima Meudt & Heenan is a subspecies of flowering plant in the family Boraginaceae, endemic to central South Island of New Zealand. Heidi Meudt and Peter Heenan described this subspecies in 2021. Plants of this subspecies of forget-me-not are perennial rosettes which form caespitose clumps, with ebracteate, erect inflorescences, and white corollas with fully incluced stamens.

<i>Myosotis traversii</i> Species of flowering plant

Myosotis traversii is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Joseph Dalton Hooker described this species in 1864. Plants of this species of forget-me-not are perennial rosettes which form tufts or clumps, with ebracteate, erect inflorescences, and white or yellow corollas with partly exserted stamens.

Myosotis × cinerascens is a hybrid species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Donald Petrie described M. cinerascens in 1891, and it was later deemed to be a hybrid in 2021. Plants of this forget-me-not are perennial rosettes which form tufts or clumps, with ebracteate, erect inflorescences, and white corollas with partly exserted stamens.

<i>Myosotis pansa</i> Species of flowering plant

Myosotis pansa is a species of flowering plant in the family Boraginaceae, endemic to the North Island of New Zealand. Lucy Moore described the variety M. petiolata var. pansa in 1961, and it was raised to species level as M. pansa by Heidi Meudt, Jessica Prebble, Rebecca Stanley and Michael Thorsen in 2013. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas and exserted anthers.

<i>Myosotis saxatilis</i> Species of flowering plant

Myosotis saxatilis is a species of flowering plant in the family Boraginaceae, endemic to New Zealand. Donald Petrie described this species in 1918. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas with stamens that are fully included in the corolla tube or sometimes partly exserted.

<i>Myosotis macrantha</i> Species of flowering plant

Myosotis macrantha is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Joseph Dalton Hooker described the species as Exarrhena macrantha in 1864, and Thomas Cheeseman transferred it to the genus Myosotis in 1885. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and yellow to dark purple corollas with stamens that are exserted.

<i>Myosotis explanata</i> Species of flowering plant

Myosotis explanata is a species of flowering plant in the family Boraginaceae, endemic to high-elevation habitats in the South Island of New Zealand. Thomas Cheeseman described the species in 1906. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas with stamens that are partly exserted, with the tips of the anthers only surpassing the scales.

<i>Myosotis suavis</i> Species of flowering plant

Myosotis suavis is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Donald Petrie described the species in 1914. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas with stamens that are partially exserted.

<i>Myosotis oreophila</i> Species of flowering plant

Myosotis oreophila is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Donald Petrie described the species in 1896. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas with stamens that are partially exserted.

<i>Myosotis forsteri</i> Species of flowering plant

Myosotis forsteri is a species of flowering plant in the family Boraginaceae, endemic to New Zealand. Johann Georg Christian Lehmann described the species in 1818. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas with stamens that are fully included or sometimes partly exserted with the tips only surpassing the scales.

<i>Myosotis venosa</i> Species of flowering plant

Myosotis venosa is a species of flowering plant in the family Boraginaceae, endemic to New Zealand. William Colenso described the species in 1896. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas with stamens that are fully exserted.

References

  1. 1 2 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" (PDF). New Zealand Threat Classification Series. 22: 1–86. OCLC   1041649797.
  2. 1 2 3 4 Petrie, D. (1916). "Descriptions of New Native Phanerogams". Transactions and Proceedings of the New Zealand Institute. 1915 (sic.) 48: 186–192.
  3. 1 2 3 4 5 6 7 8 9 10 de Lange, Peter (30 April 2022). "Myosotis eximia | New Zealand Plant Conservation Network". NZ Plant Conservation Network. Retrieved 2019-11-24.
  4. ↑ Moore, L.B. "Boraginaceae. In 'Flora of New Zealand'. (Ed. HH Allan) Vol. 1, pp. 806–833". (Government Printer: Wellington, New Zealand) floraseries.landcareresearch.co.nz. Retrieved 2022-04-27.
  5. 1 2 3 Meudt, Heidi M.; Prebble, Jessica M.; Lehnebach, Carlos A. (2015-05-01). "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:10.1007/s00606-014-1166-x. ISSN   2199-6881. S2CID   254048318.
  6. ↑ de Lange, P. J.; Murray, B. G. (March 2002). "Contributions to a chromosome atlas of the New Zealand flora—37. Miscellaneous families". New Zealand Journal of Botany. 40 (1): 1–23. doi: 10.1080/0028825X.2002.9512767 . ISSN   0028-825X.
  7. ↑ "Myosotis eximia Petrie". NZTCS. Retrieved 2019-11-29.
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