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Calothamnus quadrifidus subsp. asper

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Calothamnus quadrifidus subsp. asper
Calothamnus quadrifidus asper leaves and flowers

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: Calothamnus
Species:
Subspecies:
C. q. subsp. asper
Trinomial name
Calothamnus quadrifidus subsp. asper
(Turcz.) A.S.George & N.Gibson
Synonyms

Melaleuca quadrifida subsp. aspera (Turcz.) Craven & R.D.Edwards

Calothamnus quadrifidus subsp. asper is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is similar to other subspecies of Calothamnus quadrifidus except that its leaves are short, flat and obviously rough and scaly when mature.

Description

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Calothamnus quadrifidus subsp. asper is an erect shrub which sometimes grows to a height of 4 metres (10 ft) and lacks a lignotuber. Its leaves are flat, linear to narrow egg-shaped with the narrow end towards the base, 10–23 millimetres (0.4–0.9 in) long and 1–2 millimetres (0.04–0.08 in) wide. The leaves are also rough and scaly, with scattered hairs.[1]

The flowers are a deep red colour and are arranged in clusters, usually on one side of the stem amongst the older leaves. The stamens are arranged in 4 claw-like bundles, each about 23–28 millimetres (0.9–1 in) long. Flowering occurs from August to September and is followed by fruits which are woody, barrel-shaped capsules, 10–14 millimetres (0.4–0.6 in) long.[1]

Calothamnus quadrifidus asper growing near Wongan Hills

Taxonomy and naming

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Calothamnus quadrifidus subsp. asper was first formally described in 2010 by Alex George in Nuytsia.[2] It had originally been described in 1849 by Nikolai Turczaninow as Calothamnus asper.[1][3] The word (asper) is a Latin word meaning "rough", "harsh" or "uneven".[4]

Distribution and habitat

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Calothamnus quadrifidus subsp. asper is found in the Wongan Hills district[1] of the Avon Wheatbelt biogeographic region.[5]

Conservation

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Calothamnus quadrifidus subsp. asper is classified as "Priority Two" by the Western Australian Government Department of Parks and Wildlife[5] meaning that it is poorly known and from fewer than five locations.[6]

References

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  1. ^ a b c d George, Alex S.; Gibson, Neil (2010). "A revision of Calothamnus quadrifidus (Myrtaceae)" (PDF). Nuytsia. 20: 70–72. Retrieved 1 August 2015.
  2. ^ "Calothamnus quadrifidus subsp. asper". APNI. Retrieved 2 August 2015.
  3. ^ "Calothamnus asper". APNI. Retrieved 2 August 2015.
  4. ^ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 669.
  5. ^ a b "Calothamnus quadrifidus subsp. asper". FloraBase. Retrieved 2 August 2015.
  6. ^ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 16 July 2019.