Myosotis bryonoma

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Myosotis bryonoma
Myosotis bryonoma 14165868.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. bryonoma
Binomial name
Myosotis bryonoma
Meudt, Prebble and Thorsen [2]

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

Contents

Taxonomy and etymology

Myosotis bryonoma Meudt et al. is in the plant family Boraginaceae and was originally described in 2018 by Heidi Meudt, Jessica Prebble and Michael Thorsen. [3] [2] It is morphologically most similar to M. tenericaulis, another creeping, bracteate-prostrate species of Myosotis, and also shares some morphological characters with other bracteate-prostrate species, M. colensoi and M. cheesemanii. [2] It can be distinguished from M. tenericaulis by its shorter (<5 mm long) and wider (>0.7 mm) petioles, smaller leaves (generally <6 mm long), appressed trichomes that are parallel to the mid vein, rosette leaves that are glabrous on the underside, shorter inflorescences (10–45 mm long) and internodes (<5 mm), and fewer flowers per inflorescence (1–3). [2] M. bryonoma can be distinguished from M. colensoi and M. cheesemanii by its shorter rosette leaf petioles (< 4 mm long), shorter calyces (< 3.5 mm long at flowering), calyx lobes which are longer than half the length of the calyx, rosette leaves usually glabrous abaxially, and shorter corolla tube (< 4.3 mm long). [2]

The type specimen of Myosotis bryonoma is lodged at the herbarium (WELT) of the Museum of New Zealand, Te Papa Tongarewa. [4] [2]

The specific epithet, bryonoma, is derived from Greek words meaning ‘dwelling in moss’, i.e. bryon (moss) and nomos (place or condition for living), and refers to this species' habitat. The specific epithet was inspired by submissions from the public to give the species a new name. [5] [2]

Phylogeny

Myosotis bryonoma 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). [6] Within the southern hemisphere lineage, species relationships were not well resolved. [6] The sequences of two individuals of M. bryonoma (as M. aff. tenericaulis) grouped mainly with individuals of other small bracteate-prostrate species in the nuclear ribosomal DNA dataset, but were in a central, unresolved position in the chloroplast DNA dataset. [6]

Description

Myosotis bryonoma plants are single rosettes. The rosette leaves are few and have petioles 1–7 mm long. The rosette leaf blades are 2–7 mm long by 1–5 mm wide (length: width ratio 1.0–2.9: 1), narrowly obovate to very broadly obovate or ovate to very broadly ovate, usually widest at or above the middle, with an obtuse apex. The upper and lower surfaces of the leaf are sparsely to densely covered in straight, appressed, antrorse (forward-facing) hairs that are parallel to the mid vein. Each rosette has 1–5 ascending or prostrate, usually unbranched, bracteate inflorescences that are 10–45 cm long. The cauline leaves are similar in size, shape and hairs to the rosette leaves. There can be up to 3 flowers in each inflorescence, each one borne on a short pedicel and with a cauline leaf. The calyx is 1–3 mm long at flowering and 2–3 mm long at fruiting, lobed to half or nearly all of its length, and densely covered in short, straight, antrorse hairs. The corolla is white and up to 6 mm in diameter, with a cylindrical tube, petals that are obovate and flat, and small yellow scales alternating with the petals. The anthers are fully included inside the corolla tube, or sometimes partly exserted, with the tips only surpassing the scales. The four smooth, shiny, light brown nutlets are 1.1–1.9 mm long by 0.7–1.1 mm wide and ovoid in shape. [2] [3]

Myosotis bryonoma has M. australis type pollen. [7] [8]

The chromosome number of M. bryonoma is unknown.

It flowers and fruits from November to February. [2]

Distribution and habitat

Myosotis bryonoma is endemic to the South Island of New Zealand in Otago from (720–)970–1700 m elevation. [2] It is restricted to high-elevation mountain bogs and other damp to saturated habitats, often with mosses, cushions and other small herbs. [2]

Conservation status

The species is listed as At Risk - Naturally Uncommon in the most recent assessment (2017-2018) of the New Zealand Threatened Classification for plants. It also has the qualifiers "DP" (Data Poor), "RR" (Range Restricted) and "Sp" (Sparse). [1]

Related Research Articles

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

Myosotis chaffeyorum is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Carlos Lehnebach described the species in 2012. Plants of this species of forget-me-not are perennial with a creeping habit, bracteate inflorescences, and white corollas.

<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.

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

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

Myosotis albiflora is a species of flowering plant in the family Boraginaceae, native to southern Chile and Argentina. This species was described by Joseph Banks and Daniel Solander in Joseph Dalton Hooker's 19th century work Flora Antarctica. Plants of this species of forget-me-not are perennial and have white corollas. It is one of two native species of Myosotis in southern South America, the other being M. antarctica.

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

Myosotis cheesemanii is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Donald Petrie described the species in 1886. Plants of this species of forget-me-not are perennial rosettes with bracteate inflorescences and white corollas.

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

Myosotis colensoi is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Thomas Kirk described the species in 1896. Plants of this species of forget-me-not are perennial rosettes with bracteate inflorescences and white corollas.

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

Myosotis glabrescens 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 tightly compacted, perennial mats with bracteate inflorescences and white corollas.

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

Myosotis matthewsii is a species of flowering plant in the family Boraginaceae, endemic to the North Island of New Zealand. Lucy Moore described the species in 1961. Plants of this species of forget-me-not are perennial rosettes with bracteate inflorescences and white corollas.

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

Myosotis pulvinaris or the Cushion Forget-Me-Not 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 habit, short bracteate inflorescences, and white corollas.

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

Myosotis spatulata is a species of flowering plant in the family Boraginaceae, endemic to New Zealand. Georg Forster described the species in 1786. Plants of this species of forget-me-not are perennial rosettes with 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</i> Species of flowering plant

Myosotis lyallii is a species of flowering plant in the family Boraginaceae, endemic to New Zealand. Joseph Dalton Hooker described the species in 1853. Plants of this species of forget-me-not are perennial with a prostrate habit, bracteate or partially-bracteate inflorescences, and white corollas.

<i>Myosotis lyallii <span style="font-style:normal;">subsp.</span> elderi</i> Subspecies of flowering plant endemic to New Zealand

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 lyallii <span style="font-style:normal;">subsp.</span> lyallii</i> Subspecies of flowering plant endemic to New Zealand

Myosotis lyalliisubsp. lyallii is a subspecies of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Joseph Dalton Hooker described M. lyallii in 1853. Plants of this subspecies of forget-me-not are perennial with a prostrate habit, bracteate or partially-bracteate inflorescences, and white corollas, usually with exserted anthers.

<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 hikuwai</i> Species of flowering plant

Myosotis hikuwai is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Heidi Meudt, Jessica Prebble and Geoff Rogers described M. hikuwai in 2022. Plants of this forget-me-not are spring annuals with bracteate and erect inflorescences, and small, white corollas with inserted stamens. The species is considered Threatened and known only from one population near Wānaka.

<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.

Myosotis ultramafica is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Heidi Meudt, Jessica Prebble and Brian Rance described M. ultramafica in 2022. Plants of this forget-me-not are perennial with bracteate and prostrate to ascending inflorescences, and small, white corollas with partly exserted stamens. This species is Naturally Uncommon and only found on ultramafic substrates.

<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.

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 5 6 7 8 9 10 11 Meudt, Heidi M.; Prebble, Jessica M. (28 February 2018). "Species limits and taxonomic revision of the bracteate-prostrate group of southern hemisphere forget-me-nots (Myosotis, Boraginaceae), including description of three new species endemic to New Zealand". Australian Systematic Botany. 31 (1): 48–105. doi:10.1071/SB17045. ISSN   1446-5701. S2CID   90834744.
  3. 1 2 "Myosotis bryonoma". New Zealand Plant Conservation Network. Retrieved 3 May 2022.
  4. ↑ "Myosotis bryonoma". collections.tepapa.govt.nz. Retrieved 3 May 2022.
  5. ↑ "Unforgettable names for a new forget-me-not species". Te Papa’s Blog. 7 April 2016. Retrieved 3 May 2022.
  6. 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. S2CID   14686750.
  7. ↑ Meudt, HM (1 October 2016). "Pollen morphology and its taxonomic utility in the Southern Hemisphere bracteate-prostrate forget-me-nots (Myosotis, Boraginaceae)". New Zealand Journal of Botany. 54 (4): 475–497. doi:10.1080/0028825X.2016.1229343. ISSN   0028-825X. S2CID   89118799.
  8. ↑ "Myosotis bryonoma pollen". collections.tepapa.govt.nz. Retrieved 3 May 2022.
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