Prostanthera wilkieana

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Prostanthera wilkieana
Prostanthera wilkieana - 7.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Lamiaceae
Genus: Prostanthera
Species:
P. wilkieana
Binomial name
Prostanthera wilkieana
Prostanthera wilkieanaDistA104.png
Occurrence data from AVH

Prostanthera wilkieana is a species of flowering plant that is endemic to the more arid areas of Australia. It is an erect, densely-branched shrub with elliptic to narrow egg-shaped leaves with the narrower end towards the base and mauve to pale violet or white flowers with deep purple streaks and yellowish brown dots inside the petal tube.

Contents

Description

Prostanthera wilkieana is an erect, densely-branched shrub that typically grows to a height of 0.3–1.2 m (1 ft 0 in – 3 ft 11 in) and has its branches, leaves and sepals appearing silvery to grey due to a dense covering of hairs. The leaves are elliptic to narrow egg-shaped with the narrower end towards the base, 4–10 mm (0.16–0.39 in) long, 1.5–5.5 mm (0.059–0.217 in) wide and sessile. The flowers are arranged in groups of eight to fourteen near the ends of branchlets, each flower on a pedicel 1–3.5 mm (0.039–0.138 in) long. The sepals form a tube 2.6–4.3 mm (0.10–0.17 in) long with two lobes, the lower lobe 3.6–6.5 mm (0.14–0.26 in) long and the upper lobe 2.1–4 mm (0.083–0.157 in) long. The petals are mauve to pale violet or white, 7.5–17 mm (0.30–0.67 in) long, forming a tube 3.3–7.5 mm (0.13–0.30 in) long with deep purple streaks and yellowish brown dots inside. The middle lower lobe is spatula-shaped, 3–6.5 mm (0.12–0.26 in) long and wide, the side lobes are 5.2–8.5 mm (0.20–0.33 in) long. The upper lip is 5.5–10.5 mm (0.22–0.41 in) long and 8.5–13.8 mm (0.33–0.54 in) wide with a central notch 3–4.6 mm (0.12–0.18 in) deep. Flowering occurs from July to November. [2] [3] [4]

Taxonomy and naming

Prostanthera wilkieana was first formally described in 1874 by Ferdinand von Mueller in Fragmenta Phytographiae Australiae from specimens collected by Ernest Giles. The specific epithet (wilkieana) honour's von Mueller's friend David Elliot Wilkie, a senator in the government of the Colony of Victoria. [5] [6]

Distribution and habitat

This mint-bush occurs in arid areas of central Western Australia, the far south-west of the Northern Territory and the north-west of South Australia where it grows in spinifex sandplain communities. [3] [2] [7]

Conservation status

Prostanthera wilkieana is listed as "near threatened" by the Northern Territory Government Parks and Wildlife Commission Act but as "not threatened" in Western Australia by the Western Australian Government Department of Parks and Wildlife. [3] [7]

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References

  1. "Prostanthera wilkieana". Australian Plant Census. Retrieved 7 October 2020.
  2. 1 2 "Prostanthera wilkieana". State Herbarium of South Australia. Retrieved 7 October 2020.
  3. 1 2 3 "Prostanthera wilkieana". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. Conn, Barry J. (1988). "A taxonomic revision of Prostanthera Labill. section Prostanthera (Labiatae). 1. The species of the Northern Territory, South Australia and Western Australia". Nuytsia. 6 (3): 385–387. Retrieved 7 October 2020.
  5. "Prostanthera wilkieana". APNI. Retrieved 8 October 2020.
  6. von Mueller, Ferdinand (1875). Fragmenta Phytographiae Australiae. Melbourne: Victorian Government Printer. pp. 230–231. Retrieved 8 October 2020.
  7. 1 2 "Prostanthera wilkieana". Northern Territory Government. Retrieved 8 October 2020.