Ourisia macrophylla subsp. lactea

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Ourisia macrophylla subsp. lactea
Ourisia macrophylla lactea 349567184.jpeg
Flowering plant of Ourisia macrophylla subsp. lactea plant observed in Arthur's Pass National Park, New Zealand
Status NZTCS NT.svg
Not Threatened (NZ TCS)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Plantaginaceae
Genus: Ourisia
Species:
O. macrophylla
Subspecies:
O. m. subsp. lactea
Trinomial name
Ourisia macrophylla subsp. lactea
Synonyms
  • Ourisia macrophylla var. lactea L.B.Moore
  • Ourisia lactea (L.B.Moore) Arroyo

Ourisia macrophylla subsp. lactea is a subspecies of flowering plant in the family Plantaginaceae that is endemic to the South Island of New Zealand. Lucy Moore described O. macrophylla var. lactea in 1961, and Heidi Meudt changed the rank to subspecies in 2006. Plants of this subspecies of New Zealand foxglove are showy, perennial, large-leaved, tufted, rhizomatous herbs that are often hairy with non-glandular or glandular hairs. They have crenate, ovate to heart-shaped leaves. The flowers are in whorls in each node, with a regular calyx, and a large, white irregular corolla. The calyx and floral bracts have glandular hairs. The corolla tube is yellow with three lines of yellow hairs inside. It is found in montane to subalpine habitats and is listed as Not Threatened.

Contents

Taxonomy

Ourisia macrophylla subsp. lactea is in the plant family Plantaginaceae. [2] [3] Lucy Moore described O. macrophylla var. lactea in 1961. [4] [1]

The type material was collected by Leonard Cockayne in 1898 at Arthur's Pass, South Island, New Zealand. [4] [1] The holotype is housed at herbarium WELT at the Museum of New Zealand Te Papa Tongarewa. [1] [5]

In the Flora of New Zealand, Lucy Moore recognised five varieties within O. macrophylla as well as O. colensoi, whereas Mary Kalin Arroyo recognised two subspecies of O. macrophylla and two subspecies of O. lactea. [4] [1] [6]

In the most recent taxonomic treatment, many of these names were synonymised, and only two allopatric subspecies of O. macrophylla are recognised: North Island Ourisia macrophylla subsp. macrophylla and South Island O. macrophylla subsp. lactea. [1] The subspecies can be distinguished from one another by the hairs on the calyx and floral bracts, which lack glandular hairs in subsp. macrophylla but have glandular hairs in subsp. lactea. [1]

Description

Ourisia macrophylla subsp. lactea plants are large perennial herbs. The stems are creeping, with opposite leaves that are tightly tufted along the horizontal stem. Leaf petioles are 4.3–225.0 mm long. Leaf blades are 13.0–103.2 mm long by 9.7–68.9 mm wide (length: width ratio 0.9–1.5: 1), usually narrowly ovate to ovate, usually widest below the middle, with a rounded apex; truncate or cuneate base; and crenate edges. Leaves are glabrous or with few hairs to densely hairy with non-glandular hairs on both surfaces, and punctate on the lower surface. Inflorescences are erect, with hairy racemes up to 64.8 cm long, and with 1–6 flowering nodes and up to 53 total flowers per raceme. Each flowering node has up to 12 flowers and 2–12 sessile and sometimes clasping bracts that are usually narrowly lanceolate to narrowly ovate. The lowest bracts are similar to the leaves, 10.4–78.9 mm long and 4.0–32.0 mm wide, and become smaller toward the apex of the raceme. The uppermost floral bracts are usually densely hairy with both glandular and non-glandular hairs. The flowers are borne on a densely hairy pedicel that is up to 56.4 mm long and usually has both glandular and non-glandular hairs. The calyx is 3.6–10.0 mm long, regular, with all five lobes divided to the base, and with isolated to sparsely distributed hairs, which are glandular. The corolla is 10.3–22.2 mm long (including the 2.9–12.3 mm long corolla tube), bilabiate, tubular-funnelform, usually hairy, and white on the outside (sometimes flushed pink), and yellow and with three lines and a ring of yellow hairs on the inside. The corolla lobes are 3.1–11.1 mm long, spreading, and obcordate or obovate-spathulate. There are 4 stamens up to 11.2 mm long which are didynamous, with two long stamens that are exserted or reaching the corolla tube, and 2 short stamens also usually reaching the corolla tube opening; a short staminode 0.3–1.0 mm long is also usually present. The style is 3.7–8.2 mm long, exserted, with an emarginate stigma. The ovary is 1.6–4.4 mm long and glabrous. Fruits are capsules 4.3–8.6 mm long and 3.7–6.0 mm wide with loculicidal dehiscence and pedicels up to 74.6 mm long. It is unknown how many seeds are in each capsule, and seeds are 0.5–1.1 mm long and 0.2–0.4 mm wide, with a two-layered, reticulate seed coat. [1] [7]

Ourisia macrophylla subsp. lactea flowers from December to April and fruits from December to May. [1]

The chromosome number of Ourisiamacrophylla subsp. lactea is 2n=48. [8]

Distribution and habitat

Ourisia macrophylla subsp. lactea in its native habitat Ourisia macrophylla lactea 179693882.jpeg
Ourisia macrophylla subsp. lactea in its native habitat
Leaves of O. macrophylla subsp. lactea Ourisia macrophylla lactea 260996003.jpeg
Leaves of O. macrophylla subsp. lactea

Ourisia macrophylla subsp. lactea is probably endemic to the South Island (in Western Nelson, Marlborough, Canterbury, and Westland), however a specimen from Patea could be rare North Island populations of this subspecies. [1] This subspecies is usually found below the bushline, in damp to wet, shaded streams, waterfalls, cliffs, sides of tracks, in Nothofagus forest, or just above bushline in subalpine or alpine habitats including tussock grassland or scrubland, from 70 to 1700 m above sea level. [1] It may be very locally common. [1]

Phylogeny

Two individuals of O. macrophylla subsp. lactea were included in phylogenetic analyses of all species of the genus Ourisia using standard DNA sequencing markers (two nuclear ribosomal DNA markers and two chloroplast DNA regions) and morphological data. [9] [10] In all analyses, the two sampled individuals belonged to the highly supported New Zealand lineage, and in the nuclear ribosomal and combined datasets, they were all very closely related to one another and to other large-leaved species of New Zealand Ourisia,O. macrophylla subsp. macrophylla, O. vulcanica, O. crosbyi and O. calycina. [10] [9]

In another phylogenetic study using amplified fragment length polymorphisms (AFLPs), 20 individuals were sampled of O. macrophylla subsp. lactea. [11] This subspecies was sister to the other subspecies, and the species O. macrophylla was also monophyletic, with moderate to high support in the phylogenetic analyses of AFLP data. [11] O. macrophylla was part of a highly supported clade that was in a larger clade of other large-leaved species, i.e. O. macrocarpa, O. crosbyi, O. calycina and O. vulcanica. [11] The 36 sampled individuals of O. macrophylla however did not comprise one of the significant clusters in the Bayesian clustering analysis, nor did either of the subspecies. [11]

Conservation status

Ourisia macrophylla subsp. lactea is listed as Not Threatened in the most recent assessment (2017–2018) of the New Zealand Threatened Classification for plants. [12]

Related Research Articles

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<i>Ourisia spathulata</i> Species of flowering plants

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<i>Ourisia remotifolia</i> Species of flowering plants

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<i>Ourisia sessilifolia</i> Species of flowering plants

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<i>Ourisia sessilifolia <span style="font-style:normal;">subsp.</span> sessilifolia</i> Subspecies of flowering plants

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<i>Ourisia calycina</i> Species of flowering plants

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<i>Ourisia macrocarpa</i> Species of flowering plants

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<i>Ourisia crosbyi</i> Species of flowering plants

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<i>Ourisia macrophylla</i> Species of flowering plants

Ourisia macrophylla is a species of flowering plant in the family Plantaginaceae that is endemic to New Zealand. William Jackson Hooker described O. macrophylla in 1843. Plants of this species of New Zealand foxglove are showy, perennial, large-leaved, tufted, rhizomatous herbs that are often glabrous (hairless) or sometimes hairy with non-glandular or glandular hairs. They have crenate, ovate to heart-shaped leaves. The flowers are in whorls in each node, with a regular calyx, and a large, white irregular corolla. The corolla tube is yellow with three lines of yellow hairs inside. It is found in montane to subalpine habitats and is listed as Not Threatened.

<i>Ourisia macrophylla <span style="font-style:normal;">subsp.</span> macrophylla</i> Subspecies of flowering plants

Ourisia macrophylla subsp. macrophylla is a subspecies of flowering plant in the family Plantaginaceae that is endemic to the North Island of New Zealand. William Jackson Hooker described O. macrophylla in 1843. Plants of this subspecies of New Zealand foxglove are showy, perennial, large-leaved, tufted, rhizomatous herbs that are often glabrous (hairless) or sometimes hairy with non-glandular or glandular hairs. They have crenate, ovate to heart-shaped leaves. The flowers are in whorls in each node, with a regular calyx, and a large, white irregular corolla. The calyx and floral bracts lack glandular hairs. The corolla tube is yellow with three lines of yellow hairs inside. It is found in montane to subalpine habitats and is listed as Not Threatened.

<i>Ourisia vulcanica</i> Species of flowering plants

Ourisia vulcanica is a species of flowering plant in the family Plantaginaceae that is endemic to the North Island of New Zealand. Lucy Moore described O. vulcanica in 1961. Plants of this species of New Zealand foxglove are showy, perennial, rhizomatous herbs that can be hairy with non-glandular hairs or sometimes glabrous. They have crenate, ovate leaves. The flowers are usually in pairs in each node, with an irregular calyx, and a white irregular corolla. The calyx and floral bracts have non-glandular hairs. The corolla tube is yellow with three lines of hairs and a ring of hairs inside. It is only found in the Volcanic Plateau area and is listed as At Risk - Naturally Uncommon.

<i>Ourisia integrifolia</i> Species of flowering plants

Ourisia integrifolia or mountain whitebell is a species of flowering plant in the family Plantaginaceae that is endemic to Tasmania, Australia. Robert Brown described O. integrifolia in 1810. Plants of this species of Australian foxglove are showy, perennial, rhizomatous herbs that are mostly glabrous but can have some non-glandular hairs. They have crenate or notched, ovate to broadly ovate leaves. The flowers are usually single or in pairs in each node in the inflorescence, with a regular calyx, and a white sub-regular corolla. The corolla tube is yellow with and glabrous inside.

<i>Ourisia serpyllifolia</i> Species of flowering plants

Ourisia serpyllifolia is a species of flowering plant in the family Plantaginaceae that is endemic to the Andes mountains of central Chile. George Bentham described O. serpyllifolia in 1846. Plants of this species of South American foxglove are small, showy, perennial, many-branched and suffruticose with toothed, opposite leaves. The flowers are solitary, with a regular calyx, and a regular corolla. The calyx and corolla both have tiny glandular hairs. The corolla is violet, but the corolla tube is yellow and hairy inside.

<i>Ourisia muscosa</i> Species of flowering plant

Ourisia muscosa is a species of flowering plant in the family Plantaginaceae that is endemic to páramo habitats in the Tropical Andes mountains of Colombia, Ecuador, Peru, Bolivia and Chile. George Bentham described O. muscosa in 1846. Plants of this species of South American foxglove are small, perennial, and repent herbs with entire and tightly clustered, sometimes opposite, leaves. The flowers are solitary, with a regular calyx, and a regular corolla, and with two floral bracts that cover the calyx. The calyx has tiny glandular hairs, whereas the corolla is glabrous and white on the outside, and yellow and hairy inside.

<i>Ourisia chamaedrifolia</i> Species of flowering plant

Ourisia chamaedrifolia is a species of flowering plant in the family Plantaginaceae that is endemic to páramo habitats in the Tropical Andes mountains of Venezuela, Colombia, Ecuador, Peru and Bolivia. George Bentham described O. chamaedrifolia in 1846. Plants of this species of South American foxglove are small, perennial, and repent herbs with opposite, crenate, and often hairy leaves. There can be up to four flowers on a short raceme, and each flower has a regular calyx, and a long, tubular, red or orange-red nearly bilabiate corolla with exserted stamens. The calyx and corolla are often hairless.


Ourisia biflora is a species of flowering plant in the family Plantaginaceae that is endemic to high-elevation habitats in the Tropical Andes mountains of southern Peru and northwestern Bolivia. Hugh Algernon Weddell described O. biflora in 1860. Plants of this species of South American foxglove are small, perennial, and repent herbs with opposite, crenate, and often hairy leaves. There can be up to four flowers on a short raceme, and each flower has a regular calyx, and a long, tubular, red or orange-red nearly bilabiate corolla with exserted stamens. The calyx and corolla are often hairless.

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 Meudt, Heidi (24 April 2006). "Monograph of Ourisia (Plantaginaceae)". Systematic Botany Monographs. 77: 1–188.
  2. ↑ "Flora of New Zealand | Taxon Profile | Ourisia macrophylla subsp. lactea". www.nzflora.info. Retrieved 16 June 2024.
  3. ↑ "Ourisia macrophylla subsp. lactea". New Zealand Plant Conservation Network. Retrieved 16 June 2024.
  4. 1 2 3 Moore, L.B. "Scrophulariaceae. In 'Flora of New Zealand'. (Ed. HH Allan) Vol. 1, pp. 841–942". (Government Printer: Wellington, New Zealand) floraseries.landcareresearch.co.nz. Retrieved 26 May 2024.
  5. ↑ "Holotype of Ourisia macrophylla var. lactea (WELT SP004158)". collections.tepapa.govt.nz. Retrieved 16 June 2024.
  6. ↑ Mary T. Kalin Arroyo (July 1984). "New species and combinations in Ourisia (Scrophulariaceae) in New Zealand". New Zealand Journal of Botany. 22 (3): 447–463. doi:10.1080/0028825X.1984.10425277. ISSN   0028-825X. Wikidata   Q125368610.
  7. ↑ Webb, Colin; Simpson, Margaret Jane Annand (1 January 2001). Seeds of New Zealand Gymnosperms and Dicotyledons. Caxton Press, Manuka Press.
  8. ↑ Hair, J. B.; Arroyo, M. T. Kalin; Beuzeberg, E. J. (1 July 1984). "Contributions to a chromosome atlas of the New Zealand flora — 28 Ourisia (Scrophulariaceae)". New Zealand Journal of Botany. 22 (3): 357–359. Bibcode:1984NZJB...22..357H. doi:10.1080/0028825X.1984.10425267.
  9. 1 2 Meudt, Heidi; Simpson, Beryl Brintnall (18 April 2006). "The biogeography of the austral, subalpine genus Ourisia (Plantaginaceae) based on molecular phylogenetic evidence: South American origin and dispersal to New Zealand and Tasmania". Biological Journal of the Linnean Society. 87 (4): 479–513. doi:10.1111/J.1095-8312.2006.00584.X.
  10. 1 2 Meudt, Heidi; Simpson, Beryl Brintnall (1 October 2007). "Phylogenetic analysis of morphological characters in Ourisia (Plantaginaceae): Taxonomic and evolutionary implications". Annals of the Missouri Botanical Garden. 94 (3): 554–570. doi:10.3417/0026-6493(2007)94[554:PAOMCI]2.0.CO;2.
  11. 1 2 3 4 Meudt, Heidi; Lockhart, Peter; Bryant, David M. (20 May 2009). "Species delimitation and phylogeny of a New Zealand plant species radiation". BMC Evolutionary Biology. 9 (1): 111. Bibcode:2009BMCEE...9..111M. doi: 10.1186/1471-2148-9-111 . PMC   2700801 . PMID   19457251.
  12. ↑ 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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