Calothamnus macrocarpus
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Melaleuca macrocarpa (Hawkeswood) Craven & R.D.Edwards | |
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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.)[2]
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.[3][4]
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.[3]
Taxonomy and naming
Calothamnus macrocarpus was first formally described in 1984 by Trevor Hawkeswood in the botanical journal Nuytsia.[3][5] 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.[3]
Distribution and habitat
Calothamnus macrocarpus occurs near the summit of East Mount Barren near Hopetoun in the Esperance Plains biogeographic region[3][4] where it grows in sand and soils derived from quartzite.[6]
Conservation
Calothamnus macrocarpus is classified as "Priority Two" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions,[4] meaning that it is poorly known and from one or a few locations.[7]
References
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- ^ a b Page Module:Citation/CS1/styles.css has no content."Calothamnus macrocarpus". Australian Plant Census. Retrieved 1 September 2025.
- ^ Page Module:Citation/CS1/styles.css has no content.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.
- ^ a b c d e Page Module:Citation/CS1/styles.css has no content.Hawkeswood, Trevor J. (1984). "Nine new species of Calothamnus Labill. (Myrtaceae: Leptospermoideae) from Western Australia". Nuytsia. 5 (1): 146–147. Retrieved 30 July 2015.
- ^ a b c Page Module:Citation/CS1/styles.css has no content."Calothamnus macrocarpus". FloraBase. Retrieved 30 July 2015.
- ^ Page Module:Citation/CS1/styles.css has no content."Calothamnus macrocarpus". APNI. Retrieved 30 July 2015.
- ^ Page Module:Citation/CS1/styles.css has no content.Paczkowska, Grazyna; Chapman, Alex R. (2000). The Western Australian flora : a descriptive catalogue. Perth: Wildflower Society of Western Australia. p. 351. ISBN 978-0646402437.
- ^ Page Module:Citation/CS1/styles.css has no content."Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Biodiversity, Conservation and Attractions. Retrieved 1 September 2025.
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