Thryptomene caduca

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Thryptomene caduca
Status DECF P3.svg
Priority Three — Poorly Known Taxa (DEC)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Thryptomene
Species:
T. caduca
Binomial name
Thryptomene caduca

Thryptomene caduca is a species of flowering plant in the family Myrtaceae and is endemic to a small area in the north-west of Western Australia. It is a spreading shrub with crowded egg-shaped leaves with the narrower end towards the base, and pink flowers with five petals and seven to nine stamens.

Contents

Description

Thryptomene caduca is a spreading shrub that typically grows to 0.7–1.5 m (2 ft 4 in – 4 ft 11 in) high and about 1 m (3 ft 3 in) wide. Its leaves are crowded on the branchlets, pointing upwards and egg-shaped to more or less round, 0.8–2.5 mm (0.031–0.098 in) long and 1.0–1.2 mm (0.039–0.047 in) wide on a petiole less than 0.2 mm (0.0079 in) long. The flowers are arranged raceme-like in groups of two to six on a peduncle 1–3 mm (0.039–0.118 in) long with egg-shaped bracteoles 1–1.2 mm (0.039–0.047 in) long that fall from the flower buds. The flowers are 5.5–7 mm (0.22–0.28 in) in diameter with egg-shaped to heart-shaped, pink sepals usually 0.5–0.8 mm (0.020–0.031 in) long and keeled. The petals are pink, 1.5–2.3 mm (0.059–0.091 in) long and there are seven to nine stamens. Flowering mainly occurs from July to September. [2]

Taxonomy

Thryptomene caduca was first formally described in 2014 by Barbara Lynette Rye and Malcolm Eric Trudgen in the journal Nuytsia from specimens collected by G.J. Keighery and N. Gibson in 1996. [2] [3] The specific epithet (caduca) means "dropping off early", referring to the bracteoles. [2]

Distribution and habitat

The shrub grows in sandy places including coastal sand dunes and is found from near Tamala Station to near Hamelin Pool and Kalbarri, often with Banksia or Eucalyptus species. [2] [4]

Conservation status

Thryptomene caduca is classified as "Priority Two" by the Western Australian Government Department of Parks and Wildlife [4] meaning that it is poorly known and from only one or a few locations. [5]

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<i>Thryptomene australis</i> Species of flowering plant

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Thryptomene costata is a species of flowering plant in the family Myrtaceae and is endemic to Western Australia. It is an erect shrub with upward pointing, egg-shaped leaves with the narrower end towards the base, and white or pink flowers with five petals and ten stamens.

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Thryptomene dampieri is a species of flowering plant in the family Myrtaceae and is endemic to the north-west of Western Australia. It is a low, spreading shrub with prostrate stems, broadly egg-shaped leaves with the narrower end towards the base, and pinkish flowers with five petals and ten stamens.

Thryptomene duplicata is a species of flowering plant in the family Myrtaceae and is endemic to Western Australia. It is a spreading shrub with upward pointing, egg-shaped leaves with the narrower end towards the base, and white flowers with five petals and about fifteen stamens in two whorls.

Thryptomene elliottii is a species of flowering plant in the family Myrtaceae and is endemic to southern central Australia. It is a shrub with decussate, egg-shaped to club-shaped leaves and pink or white flowers with five petals and five stamens.

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Thryptomene globifera is a species of flowering plant in the family Myrtaceae and is endemic to western areas of Western Australia. It is a shrub with crowded, upward-pointing, broadly egg-shaped leaves with the narrower end towards the base, and pale pink or mauve flowers with ten stamens.

Thryptomene hubbardii is a species of flowering plant in the family Myrtaceae and is endemic to a small area in the west of Western Australia. It is a spreading shrub with crowded broadly egg-shaped leaves with the narrower end towards the base, and flowers with five pale pink petals and nine or ten stamens.

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.

<i>Thryptomene mucronulata</i> Species of shrub

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Thryptomene naviculata is a species of flowering plant in the family Myrtaceae and is endemic to central areas of Western Australia. It is a rounded shrub with overlapping, decussate, egg-shaped leaves with the narrower end towards the base and white flowers with five petals and five stamens.

Thryptomene nitida is a species of flowering plant in the family Myrtaceae and is endemic to a small area in the south-west of Western Australia. It is a spreading shrub with upward-pointing, egg-shaped leaves with the narrower end towards the base, and flowers with five pale purple or pinkish petals and ten stamens.

Thryptomene orbiculata is a species of flowering plant in the family Myrtaceae and is endemic to the west of Western Australia. It is a shrub with broadly egg-shaped to more or less round leaves, and flowers with five pinkish petals and usually ten stamens.

Thryptomene pinifolia is a species of flowering plant in the family Myrtaceae and is endemic to Kalbarri National Park in Western Australia. It is a shrub with linear leaves, and flowers with pale pinkish sepals and petals and seven or eight stamens.

Thryptomene podantha is a species of flowering plant in the family Myrtaceae and is endemic to the west of Western Australia. It is a shrub with egg-shaped leaves with the narrower end towards the base, and flowers with pink sepals and petals and ten stamens.

Thryptomene repens is a species of flowering plant in the family Myrtaceae and is endemic to a restricted area in the west of Western Australia. It is a prostrate shrub with egg-shaped leaves with the narrower end towards the base, and flowers with pink sepals and petals and ten stamens.

Thryptomene remota is a species of flowering plant in the family Myrtaceae and is endemic to the northern part of the Northern Territory. It is an erect shrub with linear to lance-shaped leaves with the narrower end towards the base, and white or cream-coloured flowers with ten stamens.

References

  1. ↑ "Thryptomene caduca". Australian Plant Census. Retrieved 25 April 2021.
  2. 1 2 3 4 Rye, Barbara L.; Trudgen, Malcolm E. (2014). "An update to the taxonomy of some Western Australian genera of Myrtaceae tribe Chamelaucieae. 3. Thryptomene" (PDF). Nuytsia. 24: 277–280. Retrieved 25 April 2021.
  3. ↑ "Thryptomene caduca". APNI. Retrieved 25 April 2021.
  4. 1 2 "Thryptomene caduca". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  5. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 25 April 2021.
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