Daviesia retrorsa

Daviesia retrorsa
	In Cape Arid National Park
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fabales
Family:	Fabaceae
Subfamily:	Faboideae
Genus:	Daviesia
Species:	D. retrorsa
Binomial name
	Daviesia retrorsa; Crisp

Last updated April 20, 2022

Daviesia retrorsa is a species of flowering plant in the family Fabaceae and is endemic to the south of Western Australia. It is a dense, tangled shrub with glabrous branchlets and leaves, scattered, needle-like, sharply pointed phyllodes turned backwards, and orange-yellow and red flowers.

Description

Daviesia retrorsa is a glabrous shrub that typically grows up to 1.6 m (5 ft 3 in) high and 3 m (9.8 ft) wide, and has many tangled branchlets. Its phyllodes are scattered, needle-like, 5–50 mm (0.20–1.97 in) long, 1.0–1.5 mm (0.039–0.059 in) wide, sharply pointed and turned backwards. The flowers are arranged in leaf axils in a group of two to five flowers on a peduncle 1–7 mm (0.039–0.276 in) long, the rachis 0.5–6 mm (0.020–0.236 in) long, each flower on a pedicel 3–6 mm (0.12–0.24 in) long with oblong bracts about 1 mm (0.039 in) long. The sepals are 3.5–4.0 mm (0.14–0.16 in) long and joined at the base, the upper two lobes joined for most of their length, the lower three triangular. The standard petal is egg-shaped with a notched tip, 6.0–6.5 mm (0.24–0.26 in) long, 7.5–9 mm (0.30–0.35 in) wide, and orange-yellow with a red base and yellow centre. The wings are 5.0–5.5 mm (0.20–0.22 in) long and light red, the keel 4.5–5.0 mm (0.18–0.20 in) long. Flowering occurs from August to November and the fruit is a slightly inflated, triangular, purplish-grey pod 9–11 mm (0.35–0.43 in) long.^[2]^[3]

Taxonomy

Daviesia retrorsa was first formally described in 1995 by Michael Crisp in Australian Systematic Botany from specimens collected by Mark Clements, near the Balladonia-Esperance track in 1980.^[2]^[4] The specific epithet (retrorsa) means "pointing backwards, referring to the phyllodes".^[5]

Distribution and habitat

This daviesia grows in heath on dunes or rocky outcrops in near-coastal areas of southern Western Australia, east of Hopetoun in the Esperance Plains, Hampton and Mallee biogeographic regions of southern Western Australia.^[2]^[3]

Conservation status

Daviesia retrorsa is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.^[3]

Related Research Articles

Daviesia horrida, commonly known as prickly bitter-pea, is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a spreading shrub with rigid, spiny branchlets, narrowly elliptic phyllodes and orange and dark red flowers.

Daviesia hakeoides is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a shrub with many tangled stems, scattered sharply-pointed phyllodes and yellow or orange and dark red flowers.

Daviesia pseudaphylla, commonly known as Stirling Range daviesia, is a species of flowering plant in the family Fabaceae and is endemic to the Stirling Range in the south-west of Western Australia. It is an open, spreading, glabrous shrub with low-lying stems, scattered, cylindrical phyllodes indistinguishable from branchlets, and orange-yellow and dark reddish flowers.

Daviesia aphylla is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is an erect, bushy shrub with glabrous foliage, up to six sharply-pointed phyllodes on each branchlet, and orange-red and yellow flowers.

Daviesia dilatata is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is an erect, open, glabrous shrub with scattered, often sickle-shaped phyllodes, and orange, red, yellow and dark crimson flowers.

Daviesia emarginata is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is an erect, mostly glabrous shrub with scattered egg-shaped phyllodes with the narrower end towards the base and with a notch at the tip, and yellow and pink flowers.

Daviesia eremaea is a species of flowering plant in the family Fabaceae and is endemic to central Australia. It is an erect, glabrous, multi-stemmed shrub with needle-like, more or less sharply-pointed phyllodes, and yellow and red flowers.

Daviesia flexuosa is a species of flowering plant in the family Fabaceae and is endemic to the south-west coast of Western Australia. It is a glabrous, spreading shrub with zig-zagged branchlets, scattered, sharply-pointed, narrowly triangular phyllodes and yellow and red flowers.

Daviesia glossosema, commonly known as maroon-flowered daviesia, is a species of flowering plant in the family Fabaceae and is endemic to a restricted area of south-western Western Australia. It is an erect shrub with tangled, spreading branches, cylindrical, sharply-pointed phyllodes, and unusually-shaped maroon flowers.

Daviesia implexa is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a mound-shaped shrub with many tangled stems, scattered linear phyllodes and yellow or apricot-coloured, reddish-brown and yellowish-green flowers.

Daviesia incrassata is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is an erect, mounded to spreading shrub with more or less zigzag branchlets, scattered needle-shaped phyllodes and orange, deep red and pink flowers.

Daviesia intricata is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a glabrous shrub with densely tangled branches, sharply-pointed, needle-shaped or flattened phyllodes and apricot-yellow and dark red flowers.

Daviesia major is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is an erect, many-stemmed shrub with scattered, erect, sharply-pointed, cylindrical phyllodes and orange and red flowers.

Daviesia mesophylla is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a low-lying, glabrous shrub with sharply-pointed, linear or narrowly egg-shaped phyllodes with the narrower end towards the base, and yellow to orange, red and cream-coloured flowers.

Daviesia nematophylla is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a dense, erect shrub with glabrous foliage, erect, usually needle-shaped phyllodes, and yellow, orange and dark red flowers.

Daviesia oxyclada is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a densely-branched, glabrous shrub with spiny stems, vertically compressed, triangular phyllodes with the narrower end towards the base, and yellow or orange flowers with red markings.

Daviesia purpurascens, commonly known as purple-leaved daviesia, is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a glabrous shrub with many branchlets, scattered, erect, cylindrical, sharply pointed phyllodes and yellow and maroon flowers.

Daviesia quadrilatera, commonly known as buggery bush, is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a robust, erect, glabrous shrub with angular branchlets, vertically flattened, sharply-pointed quadrilateral or triangular phyllodes with a sharp point on the end, and yellow to orange and red flowers.

Daviesia ramosissima is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a shrub with many branchlets, scattered, needle-like, sharply pointed phyllodes and orange-yellow and red flowers.

Daviesia rhizomata is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a low, rhizome-forming shrub with tangled branchlets, scattered, needle-like, sharply pointed phyllodes, and yellow and red flowers.

References

↑ "Daviesia retrorsa". Australian Plant Census. Retrieved 17 April 2022.
1 2 3 Crisp, Michael D.; Cayzer, Lindy; Chandler, Gregory T.; Cook, Lyn G. (2017). "A monograph of Daviesia (Mirbelieae, Faboideae, Fabaceae)". Phytotaxa. 300 (1): 220–222. doi: 10.11646/phytotaxa.300.1.1 .
1 2 3 "Daviesia retrorsa". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
↑ "Daviesia retrorsa". APNI. Retrieved 17 April 2022.
↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 294. ISBN 9780958034180.

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[APC-1] "Daviesia retrorsa". Australian Plant Census. Retrieved 17 April 2022.

[ASB-2] 1 2 3 Crisp, Michael D.; Cayzer, Lindy; Chandler, Gregory T.; Cook, Lyn G. (2017). "A monograph of Daviesia (Mirbelieae, Faboideae, Fabaceae)". Phytotaxa. 300 (1): 220–222. doi: 10.11646/phytotaxa.300.1.1 .

[FloraBase-3] 1 2 3 "Daviesia retrorsa". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.

[APNI-4] "Daviesia retrorsa". APNI. Retrieved 17 April 2022.

[Sharr-5] Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 294. ISBN 9780958034180.

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