Calothamnus macrocarpus

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Calothamnus macrocarpus
Status DECF P2.svg
Priority Two — 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: Calothamnus
Species:
C. macrocarpus
Binomial name
Calothamnus macrocarpus
Synonyms

Melaleuca macrocarpa (Hawkeswood) Craven & R.D.Edwards

Contents

Calothamnus macrocarpus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is an erect shrub with bright red flowers in spring and large, almost spherical fruit. It has a limited distribution near Hopetoun. (In 2014 Craven, Edwards and Cowley proposed that the species be renamed Melaleuca macrocarpa.) [1]

Description

Calothamnus macrocarpus is an erect shrub with many branches growing to a height of about 2–3 metres (7–10 ft). Its leaves are crowded, 20–30 millimetres (0.8–1 in) long, 1–2 millimetres (0.04–0.08 in) in diameter, cylindrical in shape and taper to a non-prickly point. There are prominent oil glands on the leaves. [2] [3]

The flowers are deep red usually in small clusters between the leaves. The petals are 6–8 millimetres (0.2–0.3 in) long, thin, papery and pink to brown. The stamens are arranged in 5 claw-like bundles usually with 26 to 28 stamens per bundle. Flowering occurs from August to December and is followed by fruits which are woody, almost spherical capsules, 13–18 millimetres (0.5–0.7 in) in diameter, which are often hidden in the foliage. [2]

Taxonomy and naming

Calothamnus macrocarpus was first formally described in 1984 by Trevor Hawkeswood in the botanical journal Nuytsia. [2] [4] The specific epithet (macrocarpus) is derived from the Greek macros meaning "large" or "long" and carpos meaning "fruit" and refers to the prominently large, almost spherical fruit of this species. [2]

Distribution and habitat

Calothamnus macrocarpus occurs near the summit of East Mount Barren near Hopetoun in the Esperance Plains biogeographic region [2] [3] where it grows in sand and soils derived from quartzite. [5]

Conservation

Calothamnus macrocarpus is classified as "Priority Two" by the Western Australian government department of parks and wildlife, [3] meaning that it is poorly known and from only one or a few locations, mostly in reserves or national parks. [6]

Related Research Articles

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<i>Calothamnus sanguineus</i> Species of flowering plant

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<i>Calothamnus graniticus</i> Species of flowering plant

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<i>Calothamnus brevifolius</i> Species of flowering plant

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<i>Calothamnus aridus</i> Species of flowering plant

Calothamnus aridus is a plant in the myrtle family, Myrtaceae and is endemic to central parts of Western Australia. It is an erect, densely branched shrub with many stems, needle-like leaves and orange-red to pinkish flowers, growing in arid areas with spinifex.

Calothamnus borealis is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a small, erect shrub with crowded, cylindrical leaves and red flowers. It grows in sand surrounded by spinifex or heath. In 2014 Craven, Edwards and Cowley proposed that the species be renamed Melaleuca aquilonia.

Calothamnus arcuatus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a shrub with prickly, cylindrical leaves with a slight, upward curve and bright red flowers in small groups near the older leaves.

Calothamnus formosus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a large, spreading, densely foliaged shrub with almost cylindrical, pointed leaves and red flowers in spring or summer. There are two subspecies, differing mainly in the length of their leaves.

Calothamnus glaber is a plant in the myrtle family, Myrtaceae and is endemic to near-coastal areas in the south-west of Western Australia. It is a shrub, similar to Calothamnus blepharospermus but its leaves are slightly longer and narrower and the parts of its flowers are glabrous.

<i>Calothamnus hirsutus</i> Species of flowering plant

Calothamnus hirsutus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a small, spreading shrub with prominent hairs on the leaves giving them a smoky appearance. The flowers are deep red and are usually in dense clusters between the older leaves.

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Calothamnus microcarpus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is an erect, either compact or spreading shrub with flat leaves and clusters of red flowers in spring.

<i>Calothamnus pachystachyus</i> Species of flowering plant

Calothamnus pachystachyus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is an erect, much-branched shrub with thick bark, flat leaves and clusters of red flowers in spring.

Calothamnus phellosus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a tall, spreading shrub with needle-shaped, prickly leaves and bright red flowers with five stamen bundles.

Calothamnus scabridus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a shrub with needle-shaped, prickly leaves and red flowers with four stamen bundles.

Calothamnus schaueri is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a small, spreading, sometimes prostrate shrub, growing to a height of about 0.6 metres (2 ft) with cylindrical leaves 100–200 millimetres (4–8 in) long. It has brownish red flowers from August to December. The flowers have 4 petals and 4 narrow bundles of stamens.

Calothamnus superbus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is an erect, often spreading, straggly shrub similar to Calothamnus aridus with its red flowers having 5 stamen bundles, but its leaves are longer and wider. It has a limited distribution near Pigeon Rocks south of Lake Barlee.

<i>Calothamnus tuberosus</i> Species of flowering plant

Calothamnus tuberosus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a stiff, prickly plant with cylindrical leaves and red flowers, growing near or often on granite boulders. It has a lignotuber and tuberous roots.

References

  1. Craven, Lyn A.; Edwards, Robert D.; Cowley, Kirsten J. (30 June 2014). "New combinations and names in Melaleuca (Myrtaceae)". Taxon. 63 (3): 666. doi: 10.12705/633.38 .
  2. 1 2 3 4 5 Hawkeswood, Trevor J. (1984). "Nine new species of Calothamnus Labill. (Myrtaceae: Leptospermoideae) from Western Australia" (PDF). Nuytsia. 5 (1): 146–147. Retrieved 30 July 2015.
  3. 1 2 3 "Calothamnus macrocarpus". FloraBase. Retrieved 30 July 2015.
  4. "Calothamnus macrocarpus". APNI. Retrieved 30 July 2015.
  5. Paczkowska, Grazyna; Chapman, Alex R. (2000). The Western Australian flora : a descriptive catalogue. Perth: Wildflower Society of Western Australia. p. 351. ISBN   978-0646402437.
  6. "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 28 October 2019.