Myosotis angustata

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Myosotis angustata
SP105619 Myosotis angustata Cheeseman WELT Te Papa 1592439 400251.jpg
Status NZTCS NC.svg
Nationally Critical (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. angustata
Binomial name
Myosotis angustata

Myosotis angustata is a species of flowering plant in the family Boraginaceae, endemic to 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 wholly exserted.

Contents

Description

M. angustata plants are rosettes. The rosette leaves have broad petioles that difficult to distinguish from the leaf blades. The rosette leaves are about 20 mm long by 4 mm wide (length: width ratio 5: 1), usually linear-spathulate and widest at or above the middle, with an subacute apex. Both surfaces of the leaf are uniformly and densely covered in appressed hairs, with lower density on the lower surface. Each rosette has several ascending to erect, ebracteate inflorescences that are up to 150 mm long. The cauline leaves are similar to the rosette leaves, but become smaller, are linear or narrow-oblong and subacute, and have hairs similar to the rosette leaves. The flowers are many per inflorescence, and each is borne on a short pedicel, each with a bract.

The calyx is 5–8 mm long at flowering and fruiting, lobed to one-half of its length, and densely covered in straight hairs, as well as some hooked hairs, all of which are antrorse. The corolla is white and about 7 mm in diameter, with a cylindrical tube, and small scales alternating with the petals. The anthers are exserted with the anthers surpassing the faucal scales. The nutlets are 2.2 mm long by 1 mm wide. [3] Flowering and fruiting occur in January. [3] [2]

Taxonomy and etymology

M. angustata Cheeseman is in the plant family Boraginaceae. [4] It was originally described by New Zealand botanist Thomas Cheeseman in his Manual of the New Zealand Flora in 1906. [2] The most recent treatment of this species was done by Lucy B. Moore in the Flora of New Zealand. [3]

The original specimens (syntypes) of this species were collected by Cheeseman in "Mt Arthur Plateau and Raglan Mountains", South Island, New Zealand. [2] The specimens collected by Cheeseman are housed at the herbarium of the Auckland War Memorial Museum (AK). [5] [6] [7]

Cheeseman noted that M. angustata is morphologically very similar to M. traversii, distinguishing them by M. angustata's narrower leaves and relatively longer anthers, among other differences. [2]

Phylogeny

Two individuals of M. angustata have been included in phylogenetic analyses of standard DNA sequencing markers (nuclear ribosomal DNA and chloroplast DNA regions) of New Zealand Myosotis. [8] Within the southern hemisphere lineage, species relationships, including those of the two individual sequenced of M. angustata, were not well resolved. [8]

Distribution and habitat

M.angustata is a forget-me-not originally collected from Mt Arthur and Raglan Range, in the northern part of the South Island, New Zealand. [3] It is currently considered to be extant only in Kahurangi National Park. [4]

Conservation status

M. angustata is listed as Threatened – Nationally Critical with the qualifiers Data Poor (DP) and Range Restricted (RR) on the most recent assessment (2017-2018) under the New Zealand Threatened Classification system for plants. [1]

Related Research Articles

<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 capitata</i> Species of flowering plant

Myosotis capitata is a species of flowering plant in the family Boraginaceae, endemic to the Campbell and Auckland Islands of New Zealand. Joseph Dalton Hooker described the species in his 19th century work Flora Antarctica. Plants of this species of forget-me-not are perennial and erect, and have ebracteate inflorescences and blue corollas. It is one of two native species of Myosotis in the New Zealand subantarctic islands, the other being M. antarctica, which can also have blue 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 laeta</i> Species of flowering plant

Myosotis laeta is a species of flowering plant in the family Boraginaceae, endemic to ultramafic areas of the Sounds-Nelson area of the South Island of New Zealand. Thomas Cheeseman described the species in 1885. Plants of this species of forget-me-not are perennial rosettes which form loose tufts or clumps, with ebracteate, erect inflorescences, and white 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 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 exarrhena</i> Species of flowering plant

Myosotis exarrhena is a species of flowering plant in the family Boraginaceae, endemic to Australia. Robert Brown described this species as Exarrhena suaveolens in 1810. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas with exserted stamens.

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

Myosotis amabilis is a species of flowering plant in the family Boraginaceae, endemic to New Zealand. Thomas Cheeseman described the species in 1906 based on specimens collected at Mt Hikurangi. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas with stamens that are exserted.

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

Myosotis arnoldii is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Lucy Moore described the species in 1961. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences, corollas ranging from yellow to dark purple, and stamens that are wholly exserted.

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

Myosotis saxosa is a species of flowering plant in the family Boraginaceae, endemic to the North Island of New Zealand. Joseph Dalton Hooker described the species in 1853. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas with stamens that are 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 laingii</i> Species of flowering plant

Myosotis laingii is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand, and considered to be extinct. Thomas Cheeseman described the species in 1912. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and yellow corollas with stamens that are fully exserted.

<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: 45. OCLC   1041649797.
  2. 1 2 3 4 5 Cheeseman, Thomas (1 January 1906). Manual of the New Zealand flora.
  3. 1 2 3 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 27 April 2022.
  4. 1 2 "Myosotis angustata". New Zealand Plant Conservation Network. Retrieved 25 July 2023.
  5. ↑ "Myosotis angustata - AK7471". Auckland Museum - Collections Online. Retrieved 26 July 2023.
  6. ↑ "Myosotis angustata - AK210593". Auckland Museum - Collections Online. Retrieved 26 July 2023.
  7. ↑ "Myosotis angustata - AK7472". Auckland Museum - Collections Online. Retrieved 26 July 2023.
  8. 1 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. Bibcode:2015PSyEv.301.1455M. doi:10.1007/s00606-014-1166-x. ISSN   2199-6881. S2CID   254048318.
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