Myosotis laingii

Last updated

Myosotis laingii
Myosotis laingii Cheeseman (AM AK7532).jpg
syntype herbarium specimen of Myosotis laingii AK 7532
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. laingii
Binomial name
†Myosotis laingii

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.

Contents

Taxonomy and etymology

Myosotis laingii Cheeseman is in the plant family Boraginaceae. [3] The species was originally described in 1912 by Thomas Cheeseman. [4] [2] The most recent treatment of this species was done by Lucy B. Moore in the Flora of New Zealand. [4]

The original specimens (syntypes) of Myosotis laingii were collected by Cheeseman, John Buchanan and Robert Laing in the South Island, New Zealand, some of which are likely lodged the Auckland War Memorial Museum herbarium AK (e.g. AK 7532 and AK 7533). [4] [5] [6]

Myosotis laingii is similar morphologically to another South Island species, M. laeta. [4] [2] Lucy Moore distinguished the two species from each other (and from M. petiolata ) in her key using the following characters:

"22 Hairs on undersurface of rosette-leaves retrorse........Myosotis laeta

Hairs on undersurface of rosette-leaves not retrorse.....[23]

23 Leaves spathulate to oblong, very gradually narrowed to petiole; calyx-hairs long, flexuous to slightly hooked, crowded...M. laingii" [4]

Leaves orbicular to broad-elliptic, narrowed abruptly to petiole; calyx-hairs short, stiff, sparse....M. petiolata" [4]

Phylogeny

Myosotis laingii was not included in any of the phylogenetic analyses of standard DNA sequencing markers (nuclear ribosomal DNA and chloroplast DNA regions) of New Zealand Myosotis. [7] [8]

Description

Myosotis laingii plants are rosettes. The rosette leaves have long petioles and are 80–150 mm long by 10–20 mm wide, and the leaf blade is obovate to elliptic-oblong, widest at or above the middle, with an acuminate apex. Both surfaces of the leaf are uniformly and sparsely to densely covered in appressed, antrorse hairs. Each rosette has several erect, ebracteate inflorescences that are up to 400 mm long. The cauline leaves are similar to the rosette leaves, but are smaller, become smaller toward the top of the inflorescence, oblong, and subacute, and have hairs similar to the rosette leaves. The flowers are about 12 per inflorescence, and each is borne on a short pedicel, without a bract. The calyx is 5–6 mm long at flowering and fruiting, lobed to more than one-half of its length, and with densely distributed hairs, some of which are hooked. The corolla is white and 8–10  mm in diameter, with a cylindrical tube, and small scales alternating with the petals. The anthers are fully exserted above the faucal scales. The nutlets were not described. [4]

The pollen of Myosotis laingii is unknown.

The chromosome number of M. laingii is unknown.

Flowering and fruiting for this species is unknown. [4] [2]

Distribution and habitat

Myosotislaingii is a forget-me-not that is known from only a handful of historical specimens. It has been collected in Marlborough, South Island, near Lake Tennyson and in the Kaikoura Mountains from 800–1400m above sea level. [4] [2] [9]

Conservation status

Myosotis laingii is listed as Extinct 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 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 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.

Myosotis brockieisubsp. dysis is a subspecies of flowering plant in the family Boraginaceae, endemic to southern South Island of New Zealand. Shannel Courtney and Heidi Meudt described this subspecies in 2021. Plants of this subspecies of forget-me-not are perennial rosettes which form stoloniferous mats, with long, 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 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.

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

Myosotis traversiisubsp. traversii is a subspecies of flowering plant in the family Boraginaceae, endemic to the northern South Island of New Zealand. Joseph Dalton Hooker described the species M. traversii in 1864. Plants of this subspecies 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.

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

Myosotis traversiisubsp. cantabrica is a subspecies of flowering plant in the family Boraginaceae, endemic to the central South Island of New Zealand. Lucy Moore described M. traversii var. cantabrica in 1961 and Heidi Meudt changed its rank to subspecies in 2021. Plants of this subspecies 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.

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

Myosotis venticola is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Heidi Meudt and Jessica Prebble described M. venticola in 2022. Plants of this forget-me-not are perennial with bracteate and prostrate inflorescences, and small, white corollas with partly exserted stamens.

<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 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 angustata</i> Species of flowering plant

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.

<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 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.

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 1912). "A New Genus and some New Species of Plants". Transactions and Proceedings of the New Zealand Institute. 44: 159–162.
  3. ↑ "Myosotis laingii". New Zealand Plant Conservation Network. Retrieved 30 July 2023.
  4. 1 2 3 4 5 6 7 8 9 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.
  5. ↑ "Syntype of Myosotis explanata - AK 7532". aucklandmuseum.com. Retrieved 30 July 2023.
  6. ↑ "Syntype of Myosotis laingii - AK 7533". www.aucklandmuseum.com. Retrieved 30 July 2023.
  7. ↑ Meudt, Heidi; Prebble, Jessica; Lehnebach, Carlos A. (7 November 2014). "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. S2CID   254048318.
  8. ↑ Richard Winkworth; Jürke Grau; Alastair Robertson; Peter Lockhart (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. PMID   12144755. Wikidata   Q30707919.
  9. ↑ "Myosotis laingii Cheeseman". www.gbif.org. Retrieved 30 July 2023.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.