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Thryptomene johnsonii

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Species of shrub

Thryptomene johnsonii
Conservation status

Priority Two — Poorly Known Taxa (DEC)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Thryptomene
Species: T. johnsonii
Binomial name
Thryptomene johnsonii
F.Muell.

Thryptomene johnsonii is a species of flowering plant in the family Myrtaceae and is endemic to a restricted area of Western Australia. It is a bushy shrub with rigid branches, egg-shaped leaves with the narrower end towards the base and pink flowers with five petals and usually eight stamens.

Description

Thryptomene johnsonii is a bushy shrub that typically grows to a height of up to 2 m (6 ft 7 in) and has rigid branches. Its leaves are mostly egg-shaped with the narrower end towards the base, 1.7–3.4 mm (0.067–0.134 in) long and about 1.5 mm (0.059 in) wide on a petiole 0.4–0.5 mm (0.016–0.020 in) long. The flowers are usually arranged singly in leaf axils in pairs of up to four near the ends of branchlets, each flower on a peduncle 0.4–0.7 mm (0.016–0.028 in) long with egg-shaped bracteoles 1.5–2 mm (0.059–0.079 in) long. The flowers are 6–7 mm (0.24–0.28 in) in diameter with five broadly egg-shaped sepals and five more or less round, pink petals about 2.5 mm (0.098 in) long. There are usually eight, irregularly arranged stamens. Flowering has been observed in October.

Taxonomy

Thryptomene johnsonii was first formally described in 1864 by Ferdinand von Mueller in Fragmenta phytographiae Australiae from specimens collected near the Murchison River. The specific epithet (johnsonii) honours William Johnson (1825–1887) who studied the medicinal properties of the Myrtaceae.

Distribution and habitat

This thryptomene grows in sand on a sandplain slope in the Kalbarri National Park.

Conservation status

Thryptomene johnsonii is classified as "Priority Two" by the Western Australian Government Department of Parks and Wildlife meaning that it is poorly known and from only one or a few locations.

References

  1. "Thryptomene johnsonii". Australian Plant Census. Retrieved 4 May 2021.
  2. ^ "Thryptomene johnsonii". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. ^ Rye, Barbara L.; Trudgen, Malcolm E. (2001). "A taxonomic revision of Thryptomene section Thryptomene (Myrtaceae)". Nuytsia. 13 (3): 522–523. Retrieved 4 May 2021.
  4. "Thryptomene johnsonii". APNI. Retrieved 4 May 2021.
  5. von Mueller, Ferdinand (1875). Fragmenta phytographiae Australiae. Vol. 4. Melbourne: Victorian Government Printer. p. 77. Retrieved 4 May 2021.
  6. Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 229. ISBN 9780958034180.
  7. "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 4 May 2021.
Taxon identifiers
Thryptomene johnsonii
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