Myosotis ultramafica | |
---|---|
Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Boraginales |
Family: | Boraginaceae |
Genus: | Myosotis |
Species: | M. ultramafica |
Binomial name | |
Myosotis ultramafica Meudt, Prebble & Rance [1] | |
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.
Myosotis ultramafica Meudt, Prebble & Rance is in the plant family Boraginaceae. [1] The species was described by Heidi Meudt, Jessica Prebble and Brian Rance in 2022. [1] The holotype was collected by P.N. Johnson on West Dome, Southland, New Zealand and is lodged at the Allan Herbarium of Manaaki Whenua - Landcare Research (CHR 514988). [1] [2]
The specific epithet, ultramafica, refers to the type of substrate or base rock on which M. ultramafica is found. [3] It is derived from the Latin word ultra ('beyond'), [4] and the compound word mafic which describes modal ferromagnesian minerals. [5] [1]
Myosotis ultramafica has been previously confused with M. lyallii . [1] [6] However, morphological comparison of herbarium specimens showed that M. ultramafica is morphologically most similar to M. bryonoma, M. colensoi, M. glabrescens, M. glauca and especially M. cheesemanii. Both M. cheesemanii and M. ultramafica have straight, appressed hairs on the upper surface and edges of the rosette leaves, unbranched inflorescences, few cauline leaves, and few flowers with cauline leaves (which are characters that, at the same time, can distinguish both species from M. lyallii ). [1] Myosotis ultramafica can be distinguished from M. cheesemanii and the other four species by its partially bracteate inflorescences, flexuous to curved hairs on the pedicels and calyces, long (>1.4 mm) and partially included anthers, and densely distributed calyx hairs. [1]
Myosotisultramafica was not included in phylogenetic analyses of standard DNA sequencing markers (nuclear ribosomal DNA and chloroplast DNA regions). [7] [8] Within the southern hemisphere lineage, species relationships were not well resolved. [7] [8]
Myosotis ultramafica plants are single rosettes that are sometimes stoloniferous and can cluster together to form loose clumps. The rosette leaves have petioles 2–17 mm long. The rosette leaf blades are 4–12 mm long by 1.5–4 mm wide (length: width ratio 1.4–43: 1), usually oblanceolate or narrowly obovate, and widest above the middle, with an obtuse (rarely acute) apex. The upper and lower surfaces and edges of the leaf are densely covered in mostly straight (some flexuous), mostly appressed (some patent), antrorse (forward-facing) hairs that are oriented mostly parallel to the mid vein. The hairs on the undersurface of the leaf are sometimes only patchily distributed near the leaf tip and on the mid vein. Each rosette has 1–9 ascending, unbranched partially bracteate inflorescences that are up to 71 mm long. The cauline leaves are up to 7 per inflorescence and are similar to the rosette leaves but smaller and decrease in size and become sessile toward the tip. Each inflorescence has up to 7 flowers, each borne on a pedicel up to 4 mm long at fruiting, and the lowest 1–3 flowers with a bract. The calyx is 4–5 mm long at flowering and 5–9 mm long at fruiting, lobed about one-third its length, and densely covered in antrorse (or a mixture of antrorse and retrorse) hairs that are mostly flexuous, and appressed to patent. The corolla is white, up to 8 mm in diameter, with a cylindrical tube, petals that are obovate or narrowly obovate, and small yellow scales alternating with the petals. The stamens are 7–8 mm long (measured from the base of the calyx to the anther tips). The anthers are partly exserted, with the tips only just surpassing the scales. The four smooth, shiny, dark brown nutlets are 1.4–1.9 mm long by 0.8–1.1 mm wide and narrowly ovoid or ovoid in shape. [1]
The chromosome number of M. ultramafica is unknown.
The pollen of M. ultramafica is unknown.
It flowers in December–February and fruits from January–February. [1]
Myosotis ultramafica is a forget-me-not endemic to ultramafic areas of Southland, South Island, New Zealand, from 605 to 1300 m ASL, currently known from the following nearby locations: West Dome, Bald Hill, Black Ridge and the Livingstone Mountains. [1] It is found on gravel pavements or in stonefields, on ultramafic substrates (such as serpentinite) on slopes or terraces, amongst tussocks and mānuka shrubs and often found with Gingidia decipiens , Gentianella serotina , Carex uncifolia and Wahlenbergia albomarginata . [1]
Myosotis ultramafica was listed as At Risk – Naturally Uncommon with the qualifiers Range Restricted (RR) and Sparse (Sp) in the 2012-2013 assessment under the New Zealand Threatened Classification system for plants, as M. aff. lyallii (Mossburn, CHR 320240). [1] [9] It was not listed in the most recent assessment (2017-2018) under the New Zealand Threatened Classification system for plants, [1] [10] but a recent study recommends it be listed as Threatened in the next assessment. [1]
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.
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.
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.
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.
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.
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.
Myosotis pulvinaris 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.
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.
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.
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.
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.
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.
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.
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.
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.
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 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.
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.
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.