Myosotis lytteltonensis

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Myosotis lytteltonensis
Myosotis lytteltonensis 55527331.jpg
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. lytteltonensis
Binomial name
Myosotis lytteltonensis

Myosotis lytteltonensis is a species of flowering plant in the family Boraginaceae and a synonym of Myosotis australis. It was first described as a variety of M. australis, considered endemic to the South Island of New Zealand, then raised to species status, and subsequently synonymised with Myosotis australis in 2020. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white or yellow corollas with stamens that are fully included in the corolla tube or sometimes partly exserted.

Contents

Taxonomy and etymology

Myosotis lytteltonensis (Laing & A.Wall) de Lange or Lyttelton forget-me-not [3] is in the plant family Boraginaceae. [4] It was originally described in 1924 as a variety of Myosotis australis (as M. australis var. lytteltonensis Laing & A.Wall) by Robert Malcolm Laing and Arnold Wall, thought to be restricted to Banks Peninsula, Canterbury, New Zealand. [1] It was raised to species status by Peter de Lange in 2010. [2] In the latest taxonomic treatment, it was considered to be a synonym of Myosotis australis , a species of forget-me-not native to New Zealand, Australia and New Guinea, due to a lack of distinguishing morphological characters. [5]

The lectotype of M. australis var. lytteltonensis was collected in Lyttelton in 1917 by Robert M. Laing and is housed at the Allan Herbarium of Manaaki Whenua - Landcare Research in Lincoln (CHR 17637). [6] [5] It was designated by Lucy B. Moore, and there is also an isolectotype at the same institution (CHR 17636). [5] [7]

The species epithet lytteltonensis refers to the type locality, Lyttelton, Canterbury, New Zealand. [8]

According to the latest taxonomic treatment, [5] the following names are all synonyms of Myosotis australis: M. mooreana Lehnebach, [9] M. lytteltonensis (Laing & A.Wall) de Lange [2] (and M. australis var. lytteltonensis Laing & A.Wall; [1] ), and M. australis var. conspicua Cheeseman. [10]

Breeding system

Flowers of Myosotis lytteltonensis were found to be 'initially herkogamous' in a study on the breeding system of six different species of New Zealand Myosotis. [11]

Phylogeny

One individual of Myosotis lytteltonensis was included in a phylogenetic analysis of standard DNA sequencing markers (nuclear ribosomal DNA and chloroplast DNA regions). [12] In the chloroplast DNA network, the sample of M. lytteltonensis was close to M. goyenii and M. australis, but its relationships in the nuclear ribosomal DNA network were less clear. [12] In general, within the southern hemisphere lineage, species relationships were not well resolved in that study. [12]

Distribution and habitat

Prior to its synonymy with Myosotis australis, M. lytteltonensis was thought to be endemic to Banks Peninsula, Canterbury, South Island, although some specimens from Marlborough (South Island) and southern North Island have also been identified as M. lytteltonensis. [5] [4] [1]

Conservation status

Myosotislytteltonensis was listed as Threatened - Nationally Critical on the most recent assessment (2017-2018) under the New Zealand Threat Classification system for plants, with the qualifiers "RR" (Range Restricted) and "Sp" (Sparse). [13] M. australis was listed as Not Threatened in the same assessment. [13]

Related Research Articles

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

Myosotis mooreana is a species of flowering plant in the family Boraginaceae, described as being endemic to the South Island of New Zealand by Carlos Lehnebach in 2012, and synonymised with Myosotis australis in 2020. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white or yellow corollas with stamens that are fully included in the corolla tube or sometimes partly exserted.

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

Myosotis retrorsa is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Heidi Meudt, Jessica Prebble and Rowan Hindmarsh-Walls described the species. Plants of this species of forget-me-not are perennial with a prostrate habit, bracteate inflorescences, and white corollas.

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

Myosotis tenericaulis is a species of flowering plant in the family Boraginaceae, endemic to New Zealand. Donald Petrie described the species in 1918. Plants of this species of forget-me-not are perennial rosettes with creeping, sprawling bracteate inflorescences and white corollas.

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

Myosotis uniflora 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 with a prostrate, compact, cushion or mat habit, short bracteate inflorescences, and cream to yellow corollas.

<i>Myosotis lyallii <span style="font-style:normal;">subsp.</span> elderi</i>

Myosotis lyalliisubsp. elderi is a subspecies of flowering plant in the family Boraginaceae, endemic to New Zealand. Lucy Moore described Myosotis elderi in 1961, and Heidi Meudt and Jessie Prebble treated it as a subspecies of M. lyallii in 2018. Plants of this subspecies of forget-me-not are perennial with a prostrate habit, bracteate inflorescences, and white corollas with partially exserted anthers.

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

Myosotis glauca is a species of flowering plant in the family 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 recognized it at species rank in 2010. Plants of this species of forget-me-not are perennial with a prostrate habit, bracteate inflorescences, white corollas, and often glaucous grey leaves.

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

Myosotis brevis is a species of flowering plant in the family Boraginaceae, endemic to New Zealand. George Simpson and J.S. Thomson described M. pygmaea var. minutiflora in 1942, and Peter de Lange and John Barkla recognized it at species rank in 2010, as M. brevis. Plants of this species of forget-me-not are small and annual, with a prostrate habit, bracteate inflorescences, tiny white corollas, and brown or green leaves.

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

Myosotis pansa subsp. praeceps 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 partially bracteate inflorescences and white corollas with exserted stamens.

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

Myosotis pottsiana is a species of flowering plant in the family Boraginaceae, endemic to the North Island of New Zealand. Lucy Moore described Myosotis petiolata var. pottsiana in 1961. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white corollas with 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 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 australis</i> Species of flowering plant

Myosotis australis is a species of flowering plant in the family Boraginaceae, native to New Zealand, Australia and New Guinea. Robert Brown described this species in 1810. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white or yellow corollas with stamens that are fully included in the corolla tube or sometimes partly protruded.

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

Myosotis australissubsp. australis is a subspecies of flowering plant in the family Boraginaceae, native to New Zealand and Australia. Robert Brown described M. australis in 1810. Plants of this subspecies of forget-me-not are perennial rosettes with ebracteate inflorescences and white or yellow corollas with stamens that are fully included in the corolla tube or sometimes partly protruded.

<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.

References

  1. 1 2 3 4 Robert M. Laing; A. Wall (1924). "The Vegetation of Banks Peninsula: Supplement 1". Transactions and Proceedings of the New Zealand Institute. 55: 438–444. ISSN   1176-6158. Wikidata   Q118751411.
  2. 1 2 3 Peter de Lange; Peter Brian Heenan; David Norton; Jeremy Rolfe; John Sawyer (2010). Threatened Plants of New Zealand. ISBN   978-1-877257-56-8. Wikidata   Q106497831.
  3. ↑ "Christchurch District Plan Site of Ecological Significance, Site Significance Statement" (PDF). Christchurch City Council. Retrieved 22 June 2023.
  4. 1 2 "Myosotis lytteltonensis". New Zealand Plant Conservation Network. Retrieved 22 June 2023.
  5. 1 2 3 4 5 Meudt, Heidi; Thorsen, Mike; Prebble, Jessica (1 January 2020). "Taxonomic revision of the Myosotis australis group (Boraginaceae) native to Australia, New Zealand and New Guinea". Australian Systematic Botany. 33 (6): 477. doi:10.1071/SB20014.
  6. ↑ "Lectotype of Myosotis australis var. lytteltonensis". Landcare Research Systematics Collection Data. Retrieved 22 June 2023.
  7. ↑ "Isolectotype of Myosotis australis var. lytteltonensis". Landcare Research Systematics Collection Data. Retrieved 22 June 2023.
  8. ↑ Pender, Richard. "Urtica linearifolia and Myosotis australis var. lytteltonensis, two threatened plants" (PDF). Canterbury Botanical Society Journal. 33: 38–45.
  9. ↑ Lehnebach, Carlos (21 August 2012). "Two new species of forget-me-nots (Myosotis, Boraginaceae) from New Zealand". PhytoKeys (16): 53–64. doi: 10.3897/phytokeys.16.3602 . ISSN   1314-2003. PMC   3492931 . PMID   23233811.
  10. ↑ Cheeseman, T. F. (1906), Manual of the New Zealand flora, J. Mackay, Govt. Printer, doi:10.5962/BHL.TITLE.12003, OCLC   4397520, OL   234533M, Wikidata   Q51396409
  11. ↑ Robertson, Alastair William; Lloyd, David G. (1 January 1991). "Herkogamy, dichogamy and self-pollination in six species of Myosotis (Boraginaceae)". 5 (1): 53–63.{{cite journal}}: Cite journal requires |journal= (help)
  12. 1 2 3 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:10.1007/s00606-014-1166-x. ISSN   2199-6881.
  13. 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.
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