Ourisia confertifolia

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Ourisia confertifolia
Flowering O. confertifolia observed in Fiordland National Park, South Island, New Zealand

Naturally Uncommon (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. confertifolia
Binomial name
Ourisia confertifolia

Ourisia confertifolia is a species of

perennial
, small-leaved rosette herbs that have hairy, crenate leaves, and flowers single or in pairs in each node. The corolla tube is glabrous and yellow inside. It is listed as At Risk - Naturally Uncommon.

Taxonomy

Ourisia confertifolia Arroyo is in the plant family Plantaginaceae.[2][3] Mary Kalin Arroyo described O. confertifolia 1984.[4][1]

The type material was collected by Mary Kalin Arroyo at Gertrude Saddle, Fiordland National Park, South Island, New Zealand.[4][1] The holotype is housed at the Allan Herbarium of Manaaki Whenua – Landcare Research.[4][5]

Ourisia confertifolia is morphologically similar to other New Zealand small-leaved species, namely O. sessilifolia, O. simpsonii, and O. spathulata, with which it shares irregular white corollas and having a mixture of glandular and non-glandular hairs on many plant parts.[4]

O. confertifolia can be distinguished from O. sessilifolia by its corolla tube that is yellow and glabrous (hairless) inside (vs. purple and with 1 or 3 lines of hairs), flowers and bracts in pairs only (vs. sometimes in whorls), irregular calyces (vs. regular), and leaves that are glabrous on the underside (vs. hairy).[4]

O. confertifolia can be distinguished from O. simpsonii by a number of characters including its smaller, narrower flowers (especially the style which is < 4.8 mm in O. confertifolia vs. > 4.9 mm in O. simpsonii) which are yellow inside the corolla tube (vs. yellow and sometimes purple in O. simpsonii). The glandular hairs on the pedicels of O. confertifolia are the same length as the non-glandular hairs (whereas they are much smaller in O. simpsonii). The two species have non-overlapping geographic distributions, with O. simpsonii in the northern South Island only.[4]

O. confertifolia can be distinguished from O. spathulata by its rosette habit (vs. leaves found along the stem), leaves with a silky appearance on the upper side (vs. densely glandular-hairy with a velvety appearance on the upper side, and usually shorter inflorescences (< 9 cm long vs. > 10 cm long).[4]

Flowers with no hairs (glabrous) inside the corolla tube
Rosette of hairy leaves

Description

Ourisia confertifolia plants are

emarginate stigma. The ovary is 2.6–4.6 mm long and glabrous. Fruits are capsules 4.5–7.1 mm long and 3.3–4.8 mm wide with loculicidal dehiscence and pedicels up to 21.6 mm long. There are about 240 tiny seeds in each capsule, 0.7–1.0 mm long and 0.4–0.5 mm wide, with a two-layered, reticulate seed coat.[4][6]

Ourisia confertifolia flowers from November to February and fruits from January to May.[4]

The chromosome number of Ourisia confertifolia is 2n=48.[7]

Distribution and habitat

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

Westland, Fiordland and Southland in high-elevation habitats in herbfields, grasslands or rocky, sheltered habitats from 1200 to 2200 m above sea level.[4]

Phylogeny

An individual of O. confertifolia 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.[8][9] In all analyses, the sampled individual belonged to the highly supported New Zealand lineage, and in the nuclear ribosomal and combined datasets, it was strongly supported in a clade with two other southern South Island endemic species, Ourisia spathulata and O. glandulosa.[8][9]

In another phylogenetic study using amplified fragment length polymorphisms (AFLPs), all four sampled individuals formed a highly supported clade that was in turn highly supported as being closely related to O. spathluata and O. glandulosa.[10] The four sampled individuals of O. confertifolia also comprised one of the significant clusters in the Bayesian clustering analysis.[10]

Conservation status

Ourisia confertifolia is listed as At Risk - Naturally Uncommon in the most recent assessment (2017–2018) of the New Zealand Threatened Classification for plants.[11]

Gallery

  • Flowers and fruiting plants of O. confertifolia

References

  1. ^
    doi:10.1080/0028825X.1984.10425277
    .
  2. ^ a b "Ourisia confertifolia". New Zealand Plant Conservation Network. Retrieved 21 April 2024.
  3. ^ "Flora of New Zealand | Taxon Profile | Ourisia confertifolia". www.nzflora.info. Retrieved 21 April 2024.
  4. ^ a b c d e f g h i j Meudt, Heidi (24 April 2006). "Monograph of Ourisia (Plantaginaceae)". Systematic Botany Monographs. 77: 1–188.
  5. ^ "Holotype of Ourisia confertifolia (CHR 256836)". Manaaki Whenua - Landcare Research Systematics Collections Data. Retrieved 21 April 2024.
  6. ^ Webb, Colin; Simpson, Margaret Jane Annand (1 January 2001). Seeds of New Zealand Gymnosperms and Dicotyledons. Caxton Press, Manuka Press.
  7. doi:10.1080/0028825X.1984.10425267
    .
  8. ^
    doi:10.1111/J.1095-8312.2006.00584.X
    .
  9. ^
    doi:10.3417/0026-6493(2007)94[554:PAOMCI]2.0.CO;2
    .
  10. ^
    PMID 19457251
    .
  11. OCLC 1041649797
    .

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=Ourisia_confertifolia&oldid=1221266510"