Calytrix retrorsifolia

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Calytrix retrorsifolia
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Calytrix
Species:
C. retrorsifolia
Binomial name
Calytrix retrorsifolia

Calytrix retrorsifolia is a species of flowering plant in the myrtle family Myrtaceae and is endemic to a restricted part of the south-west of Western Australia. It is a slender, spreading, open shrub with linear leaves and clusters of white flowers with 23 to 40 white stamens in several rows.

Contents

Description

Calytrix retrorsifolia is a slender, spreading, open shrub that typically grows to a height of up to 0.3–2 m (1 ft 0 in – 6 ft 7 in). The leaves are linear, 3.7–7.3 mm (0.15–0.29 in) long, 0.3–0.45 mm (0.012–0.018 in) wide on a petiole 0.5–1 mm (0.020–0.039 in) long. The flowers are borne in clusters 20–100 mm (0.79–3.94 in) long on a peduncle about 0.5 mm (0.020 in) long with green to light brown bracteoles 1.5–3.0 mm (0.059–0.118 in) long. The floral tube is 1.5–2.0 mm (0.059–0.079 in) long and has 5 ribs. The sepals are 0.3–0.6 mm (0.012–0.024 in) long and 0.4–0.5 mm (0.016–0.020 in) wide and lack awns. The petals are yellow in the bud stage, then white, 4–5 mm (0.16–0.20 in) long and 0.5–1.3 mm (0.020–0.051 in) wide with 23 to 40 white stamens, the longest filaments 3–4 mm (0.12–0.16 in) long. Flowering mostly occurs in October. [2] [3]

Taxonomy

Calytrix retrorsifolia was first formally described in 2017 by Francis Jason Nge and Kevin R. Thiele in the journal Nuytsia from specimens collected near Tutunup by Greg Keighery and Neil Gibson. [2] [4] The specific epithet (retrorsifolia) means 'bent backwards-leaved'. [2]

Distribution and habitat

This species of Calytrix is restricted to the Whicher Range where it grows in shallow red clays and/or yellow sands in shrublands and woodlands in the Swan Coastal Plain bioregion of south-western Western Australia. [2] [3]

Conservation status

This star flower is listed as "Priority One" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, [3] meaning that it is known from only one or a few locations where it is potentially at risk. [5]

Related Research Articles

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<i>Calytrix violacea</i> Species of flowering plant

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Calytrix pulchella is a species of flowering plant in the myrtle family Myrtaceae and is endemic to the south-west of Western Australia. It is a glabrous shrub with widely spaced, linear to narrowly elliptic leaves and purple flowers, with about 40 to 50 stamens in several rows.

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Calytrix cravenii is a species of flowering plant in the myrtle family Myrtaceae and is endemic to the south-west of Western Australia. It is an erect, open shrub with linear leaves and clusters of white flowers with 18 to 29 white stamens in several rows.

Calytrix gomphrenoides is a species of flowering plant in the myrtle family Myrtaceae and is endemic to the Kimberley region of Western Australia. It is a glabrous, multi-stemmed shrub with linear leaves and white flowers turning pink as they age, with 16 to 18 stamens in a single row.

<i>Calytrix hirta</i> Species of flowering plant

Calytrix hirta is a species of flowering plant in the myrtle family Myrtaceae and is endemic to the south-west of Western Australia. It is a spreading shrub with linear to slightly curved leaves and clusters of white flowers with 32 to 46 white stamens in several rows.

Calytrix hislopii is a species of flowering plant in the myrtle family Myrtaceae and is endemic to inland regions of Western Australia. It has been described as a "squat, gnarled sub shrub" with narrowly elliptic to linear leaves and yellow flowers with about 25 to 40 stamens in several rows.

References

  1. ↑ "Calytrix retrorsifolia". Australian Plant Census. Retrieved 27 January 2025.
  2. 1 2 3 4 Nge, Francis J.; Thiele, Kevin R. (2017). "A revision of the Calytrix acutifolia complex (Myrtaceae: Chamelaucieae)". Nuytsia. 28: 335–336. Retrieved 27 January 2025.
  3. 1 2 3 "Calytrix retrorsifolia". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. ↑ "Calytrix retrorsifolia". Australian Plant Name Index. Retrieved 27 January 2025.
  5. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Biodiversity, Conservation and Attractions. Retrieved 27 January 2025.
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