Ourisia simpsonii

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Ourisia simpsonii
Flowering O. simpsonii observed near Lewis Tops, Canterbury, South Island, New Zealand

Not Threatened (NZ TCS)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Plantaginaceae
Genus: Ourisia
Species:
O. simpsonii
Binomial name
Ourisia simpsonii

Ourisia simpsonii is a species of

zygomorphic
calyx and corolla. The corolla is white and the corolla tube is yellow and glabrous inside, and purple outside. It is listed as Not Threatened.

Taxonomy

Ourisia simpsonii (L.B.Moore) Arroyo is in the plant family Plantaginaceae.[2][3] Lucy Moore first described O. sessilifolia var. simpsonii L.B.Moore in 1961, and Mary Kalin Arroyo elevated it to species level as O. simpsonii in 1984 due to the numerous morphological differences that distinguish them.[4][1][5]

The type material was collected by

isotype at the herbarium of the Royal Botanic Gardens Kew.[4][7]

Ourisia simpsonii is morphologically similar to other New Zealand small-leaved species, namely O. sessilifolia, with which it shares the subrosette or rosette habit, ovate to very broadly ovate or obovate to very broadly obovate leaves, irregular white corollas, and having a mixture of glandular and non-glandular hairs on many plant parts.[1][5]

O. simpsonii can be distinguished from O. sessilifolia by irregular calyces (vs. regular), flowers and bracts in pairs only (vs. sometimes in whorls), glabrous and yellow corolla tubes (vs. 1 or 3 lines of hairs and purple), and long glandular hairs that are the same size as the non-glandular hairs (vs. glandular hairs that are much shorter than the non-glandular hairs).[1][5]

Description

Close-up of flowers showing white corollas with corolla tubes that are glabrous and yellow inside, and purple outside near the base

Ourisia simpsonii plants are

emarginate stigma. The ovary is 2.0–2.9 mm long and glabrous. Fruits are capsules c. 5.0 mm long and c. 4.3 mm wide with loculicidal dehiscence and pedicels up to 29.5 mm long. The number of seeds in each capsule is unknown, and seeds are 0.8–1.0 mm long and 0.5–0.7 mm long, with a two-layered, reticulate seed coat.[5][8]

Ourisia simpsonii flowers from November to April and fruits from January to March.[5]

Flowering plant of O. simpsonii showing rosette habit and hairy leaves, peduncle and pedicel

The chromosome number of Ourisia simpsonii is 2n=48.[9]

Distribution and habitat

Ourisia simpsonii is a New Zealand mountain foxglove that is endemic to the

Westland in high-elevation herbfields and grasslands on cliffs, crevices and rocky areas, from 1200 to 2300 m above sea level.[4]

Phylogeny

An individual of O. simpsonii was 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.[5][10] In all analyses, the sampled individual belonged to the highly supported New Zealand lineage, but its placement was not well resolved within that clade.[5][10]

In another phylogenetic study using amplified fragment length polymorphisms (AFLPs), all 16 sampled individuals formed a highly supported clade that was placed with strong support near O. sessilifolia.[11] The 16 sampled individuals of O. simpsonii also comprised one of the significant clusters in the Bayesian clustering analysis.[11]

Conservation status

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

References

  1. ^
    doi:10.1080/0028825X.1984.10425277
    .
  2. ^ a b "Ourisia simpsonii". New Zealand Plant Conservation Network. Retrieved 11 May 2024.
  3. ^ "Flora of New Zealand | Taxon Profile | Ourisia simpsonii". www.nzflora.info. Retrieved 11 May 2024.
  4. ^ a b c d 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. ^ a b c d e f g h Meudt, Heidi (24 April 2006). "Monograph of Ourisia (Plantaginaceae)". Systematic Botany Monographs. 77: 1–188.
  6. ^ "Holotype of Ourisia sessilifolia var. simpsonii (CHR 76133)". Manaaki Whenua - Landcare Research Systematics Collections Data. Retrieved 11 May 2024.
  7. ^ "Isotype of Ourisia sessilifolia Hook.f. var. simpsonii L. B. Moore on JSTOR". plants.jstor.org. Retrieved 11 May 2024.
  8. ^ Webb, Colin; Simpson, Margaret Jane Annand (1 January 2001). Seeds of New Zealand Gymnosperms and Dicotyledons. Caxton Press, Manuka Press.
  9. doi:10.1080/0028825X.1984.10425267
    .
  10. ^
    doi:10.3417/0026-6493(2007)94[554:PAOMCI]2.0.CO;2
    .
  11. ^
    PMID 19457251
    .
  12. OCLC 1041649797
    .

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=Ourisia_simpsonii&oldid=1225696658"