Swainsona campestris

Swainsona campestris
	Near Koonalda Cave
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fabales
Family:	Fabaceae
Subfamily:	Faboideae
Genus:	Swainsona
Species:	S. campestris
Binomial name
	Swainsona campestris; J.M.Black

Last updated March 12, 2024

Swainsona campestris is a species of flowering plant in the family Fabaceae and is endemic to arid areas of southern Australia. It is an erect perennial herb with imparipinnate leaves with 9 to 11 linear to narrowly lance-shaped leaflets, and racemes of pink or purple flowers in racemes of 5 to 10.

Description

Swainsona campestris is an erect perennial herb, that typically grows to a height of up to 60 cm (24 in) with stems 1.5–2.5 mm (0.059–0.098 in) wide and hairy. The leaves are imparipinnate, mostly 5–8 mm (0.20–0.31 in) long with 9 to 11 linear to lance-shaped leaflets, the leaflets 5–20 mm (0.20–0.79 in) long and 1–2 mm (0.039–0.079 in) wide with stipules 3–10 mm (0.12–0.39 in) long at the base of the petiole. The flowers are pink or purple, arranged in racemes of 5 to 10, each flower 8–10 mm (0.31–0.39 in) long on a peduncle 0.5–1.5 mm (0.020–0.059 in) wide with egg-shaped bracts about 2 mm (0.079 in) long at the base. The sepals are softly-hairy and joined at the base, forming a tube about 2.5 mm (0.098 in) long with the lobes shorter than the sepal tube. The standard petal is 10–12 mm (0.39–0.47 in) long, 3–10 mm (0.12–0.39 in) wide, the wings 6–10 mm (0.24–0.39 in) long and the keel 7–9 mm (0.28–0.35 in) long. Flowering usually occurs from July to October, and the fruit is an oblong pod 10–20 mm (0.39–0.79 in) long and 4–5 mm (0.16–0.20 in) wide.^[2]^[3]^[4]

Taxonomy and naming

Swainsona campestris was first formally described in 1926 by John McConnell Black in the Flora of South Australia .^[5] The specific epithet (campestris) means "pertaining to a plain".^[6]

Distribution and habitat

This species of pea grows in sandy soil on treeless plains or sparse woodland in South Australia and south-eastern Western Australia.^[2]^[3]^[4]

Conservation status

Swainsona campestris is listed as "not threatened" in Western Australia by the Western Australian Government Department of Biodiversity, Conservation and Attractions.^[3]

Related Research Articles

Swainsona behriana, commonly known as Behr's swainsona, is a species of flowering plant in the family Fabaceae and is endemic to south-eastern continental Australia. It is a prostrate or low-growing perennial herb with imparipinnate leaves usually with 9 to 13 narrowly elliptic to egg-shaped leaflets with the narrower end towards the base, and racemes of 2 to 7 purple flowers.

Swainsona acuticarinata is a species of flowering plant in the family Fabaceae and is endemic to arid areas of central Australia. It is a prostrate perennial herb with imparipinnate leaves with 5 to 11 leaflets, and racemes of purple flowers.

Swainsona brachycarpa, commonly known as slender swainson-pea, is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is a prostrate or ascending perennial herb with imparipinnate leaves usually with 9 to 13 egg-shaped to narrowly elliptic or egg-shaped leaflets, and racemes of up to 12 white, purple or dark red flowers.

Swainsona bracteata is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is a perennial herb with imparipinnate leaves usually with 19 to 25 narrowly egg-shaped leaflets, and racemes of about 20 white, pale pink or pale purple flowers.

Swainsona burkittii, commonly known as woolly Darling pea, is a species of flowering plant in the family Fabaceae and is endemic to inland Australia. It is an erect or low-lying perennial with imparipinnate leaves usually with 15 to 30 egg-shaped to more or less circular leaflets, and racemes of up to fifty dark reddish-purple flowers.

Swainsona calcicola is a species of flowering plant in the family Fabaceae and is endemic to north-western Western Australia. It is a prostrate or ascending, low-growing perennial with many stems, imparipinnate leaves usually with 7 to 11 broadly egg-shaped leaflets with the narrower end towards the base, and racemes of usually 4 or 5 pink, purple or red flowers.

Swainsona campylantha, commonly known as Gilgai Darling pea, is a species of flowering plant in the family Fabaceae and is endemic to inland areas of Australia. It is a low-growing perennial with imparipinnate leaves usually with up to 7 narrowly lance-shaped to narrowly elliptic leaflets, and racemes of 2 to 10 pink to purple flowers.

Swainsona cyclocarpa is a species of flowering plant in the family Fabaceae and is endemic to northern inland areas of Australia. It is a prostrate or low-growing annual with imparipinnate leaves usually with up to 7 usually egg-shaped leaflets with the narrower end towards the base, and racemes of 4 to 16 purple flowers.

Swainsona disjuncta is a species of flowering plant in the family Fabaceae and is endemic to widely separated areas of central Australia. It is a prostrate perennial herb with imparipinnate leaves with 3 to 9 egg-shaped leaflets, and racemes of purple, pink or red flowers in racemes of 3 to 15.

Swainsona ecallosa is a species of flowering plant in the family Fabaceae and is endemic to central Western Australia. It is an erect, single-stemmed, annual herb with imparipinnate leaves with about 17 narrowly egg-shaped leaflets, and racemes of purple flowers in racemes of up to 20.

Swainsona eremaea is a species of flowering plant in the family Fabaceae and is endemic to South Australia. It is a low-growing, spreading, probably perennial plant with imparipinnate leaves with 5 to 11 linear, oblong to broadly wedge-shaped leaflets, and racemes of bright red to brown or yellow flowers in racemes of 5 to 20.

Swainsona extrajacens is a species of flowering plant in the family Fabaceae and is endemic to central Australia. It is an erect, annual plant with imparipinnate leaves with 9 to 21 linear, egg-shaped leaflets, and racemes of purple flowers in racemes of 5 to 10.

Swainsona fissimontana is a species of flowering plant in the family Fabaceae and is endemic to inland areas of southern continental Australia. It is a compact, erect or upright perennial herb with imparipinnate leaves with 7 to 13 narrowly elliptic to elliptic leaflets, and racemes of pink to dark purplish flowers in racemes of 3 to 11.

Swainsona forrestii is a species of flowering plant in the family Fabaceae and is endemic to the central northern Western Australia. It is an erect or spreading, single-stemmed annual herb, with imparipinnate leaves with about 13 to 17 narrowly egg-shaped or narrowly ellipitic leaflets, and racemes of dark brownish red to purple or pink flowers in racemes of 30 or more.

Swainsona fuscoviridis is a species of flowering plant in the family Fabaceae and is endemic to South Australia. It is a perennial plant with many stems and imparipinnate leaves with mostly 7 or 9 ellipitic, linear or egg-shaped or lance-shaped leaflets, and racemes of 12 to 20 purple flowers.

Swainsona halophila is a species of flowering plant in the family Fabaceae and is endemic to inland areas of Western Australia. It is usually a prostrate annual herb with imparipinnate leaves with 9 to 13 egg-shaped to broadly wedge-shaped leaflets, and racemes of 2 to 9 purple flowers.

Swainsona incei is a species of flowering plant in the family Fabaceae and is endemic to inland Western Australia. It is an erect or ascending annual, sometimes perennial herb with imparipinnate leaves with 5 to 9 lance-shaped to elliptic leaflets, and racemes of 2 to 30 purple flowers.

Swainsona katjarra, commonly known as Birriliburu swainsona, is a species of flowering plant in the family Fabaceae and is endemic to inland Western Australia. It is an erect annual herb with imparipinnate leaves with 4 to 6 lance-shaped to egg-shaped to elliptical leaflets, and racemes of 15 to 25 magenta flowers.

Swainsona kingii is a species of flowering plant in the family Fabaceae and is endemic to the Western Australia. It is a prostrate or ascending annual or perennial herb, with imparipinnate leaves with usually 5 egg-shaped leaflets with the narrower end towards the base, and racemes of 1 to 3 pink to purple flowers.

Swainsona laciniata is a species of flowering plant in the family Fabaceae and is endemic to north-western Australia. It is a prostrate or ascending perennial herb with imparipinnate leaves with 7 to 13 broadly elliptic to broadly egg-shaped leaflets, and racemes of 3 to 8 purple flowers.

References

↑ "Swainsona campestris". Australian Plant Census. Retrieved 12 November 2022.
1 2 Thonpson, Joy (1993). "A revision of the genus Swainsona (Fabaceae)". Telopea. 5 (3): 521–522. Retrieved 13 November 2023.
1 2 3 "Swainsona campestris". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
1 2 "Swainsona campestris". State Herbarium of South Australia. Retrieved 13 November 2023.
↑ "Swainsona campestris". Australian Plant Name Index. Retrieved 12 November 2023.
↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 156. ISBN 9780958034180.

This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.

[APC-1] "Swainsona campestris". Australian Plant Census. Retrieved 12 November 2022.

[J.Thompson-2] 1 2 Thonpson, Joy (1993). "A revision of the genus Swainsona (Fabaceae)". Telopea. 5 (3): 521–522. Retrieved 13 November 2023.

[FB-3] 1 2 3 "Swainsona campestris". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.

[SA-4] 1 2 "Swainsona campestris". State Herbarium of South Australia. Retrieved 13 November 2023.

[APNI-5] "Swainsona campestris". Australian Plant Name Index. Retrieved 12 November 2023.

[Sharr-6] Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 156. ISBN 9780958034180.

[1]

[2]

[3]

[4]

[5]

[6]