Calothamnus quadrifidus subsp. teretifolius

Calothamnus quadrifidus subsp. teretifolius
Conservation status
	; Priority Four — Rare Taxa (DEC)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Myrtales
Family:	Myrtaceae
Genus:	Calothamnus
Species:	C. quadrifidus
Subspecies:	C. q. subsp. teretifolius
Trinomial name
	Calothamnus quadrifidus subsp. teretifolius; A.S.George & N.Gibson
Synonyms
	Melaleuca quadrifida subsp. teretifolia (A.S.George & N.Gibson) Craven & R.D.Edwards

Calothamnus quadrifidus subsp. teretifolius 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 glabrous and cylindrical. (Subspecies quadrifidus also has cylindrical leaves but they often have a covering of long, silky hairs.)

Description

Calothamnus quadrifidus subsp. teretifolius is an erect shrub which sometimes grows to a height of 5 metres (20 ft). Its leaves are linear, circular in cross section, lack hairs, are 15–35 millimetres (0.6–1 in) long and 0.6–1.0 millimetre (0.02–0.04 in) wide.[1]

The flowers are red 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 26–29 millimetres (1.0–1.1 in) long. Flowering occurs from September to December and is followed by fruits which are woody capsules, 6.5–9 millimetres (0.3–0.4 in) long.[1]

Taxonomy and naming

Calothamnus quadrifidus subsp. teretifolius was first formally described in 2010 by Alex George in Nuytsia from a specimen collected west of the Whicher Scarp.[2] The epithet teretifolius is "from the Latin teres (terete) and folium (a leaf).[1]

Distribution and habitat

Calothamnus quadrifidus subsp. teretifolius is found inland from Busselton[1] in the Jarrah Forest and Swan Coastal Plain biogeographic regions.[3] It grows in clay in winter-west areas in shrubland.[1]

Conservation

Calothamnus quadrifidus subsp. teretifolius is classified as "Priority Four" by the Western Australian Government Department of Parks and Wildlife[3] meaning that it is rare or near threatened.[4]

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References

George, Alex S.; Gibson, Neil (2010). "A revision of Calothamnus quadrifidus (Myrtaceae)" (PDF). Nuytsia. 20: 59–62. Retrieved 4 August 2015.
"Calothamnus quadrifidus subsp. teretifolius". APNI. Retrieved 4 August 2015.
"Calothamnus quadrifidus subsp. teretifolius". FloraBase. Retrieved 2 August 2015.
"Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 16 July 2019.

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[George-1] George, Alex S.; Gibson, Neil (2010). "A revision of Calothamnus quadrifidus (Myrtaceae)" (PDF). Nuytsia. 20: 59–62. Retrieved 4 August 2015.

[APNI-2] "Calothamnus quadrifidus subsp. teretifolius". APNI. Retrieved 4 August 2015.

[FloraBase-3] "Calothamnus quadrifidus subsp. teretifolius". FloraBase. Retrieved 2 August 2015.

[codes-4] "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 16 July 2019.