Swainsona oroboides

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Swainsona oroboides
Swainsona oroboides.jpg
In Hattah Lakes National Park
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Genus: Swainsona
Species:
S. oroboides
Binomial name
Swainsona oroboides
Synonyms [1]
  • Swainsona oroboidesF.Muell. ex Benth. subsp. oroboides
  • Swainsona oroboidesF.Muell. ex Benth. var. oroboides
  • Swainsonia oroboidesF.Muell. orth. var.

Swainsona oroboides, commonly known as variable swainsona [2] or kneed Darling pea, [3] is a species of flowering plant in the family Fabaceae and is endemic to Australia. It is a prostrate or ascending perennial plant with imparipinnate leaves with 3 to 7 narrowly elliptic leaflets and racemes of 3 to about 16 purple flowers.

Description

Swainsona oroboides is a prostrate or ascending perennial plant, that typically grows to a height of up to 15 cm (5.9 in) and has many stems. The leaves are imparipinnate, mostly 20–70 mm (0.79–2.76 in) long with 3 to 7 narrowly elliptic leaflets, the side leaflets 10–24 mm (0.39–0.94 in) long and 2–5 mm (0.079–0.197 in) wide with stipules mostly 3–5 mm (0.12–0.20 in) long at the base of the petioles. The flowers are purple, arranged in racemes of 3 to about 16, 50–150 mm (2.0–5.9 in) long, on a peduncle 0.5–1.5 mm (0.020–0.059 in) long. The sepals are joined at the base to form a tube about 1.5 mm (0.059 in) long, with lobes a little to much longer than the tube. The standard petal is 7–10 mm (0.28–0.39 in) long and 8–12 mm (0.31–0.47 in) wide, the wings about 5–8 mm (0.20–0.31 in) long and the keel about 6–10 mm (0.24–0.39 in) long and 2.5–3.0 mm (0.098–0.118 in) deep. [3] [4] [5] Flowering occurs from June to September, [2] and the fruit is a broadly oblong pod about 10 mm (0.39 in) long on a stalk about 1 mm (0.039 in) long, with the remains of the strongly curved style 3–4 mm (0.12–0.16 in) long. [4]

Taxonomy and naming

Swainsona oroboides was first formally described in 1864 by George Bentham in Flora Australiensis from an unpublished description by Ferdinand von Mueller. [6] [7] The specific epithet (oroboides) means "Orobus-like". (Orobus is now known as Lathyrus .) [8]

Distribution

This species of swainsona is widespread in inland areas of Western Australia, South Australia, New South Wales and southern parts of the Northern Territory and Queensland, where it usually grows on open plains and eucalypt or mulga woodland. [2] [3] [4] [5] [9]

Related Research Articles

<i>Swainsona behriana</i> Species of plant

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.

<i>Swainsona brachycarpa</i> Species of plant

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.

<i>Swainsona burkei</i> Species of plant endemic to Australia

Swainsona burkei is a species of flowering plant in the family Fabaceae and is endemic to northern Australia. It is a prostrate or perennial subshrub with imparipinnate leaves usually with 5 to 11 oblong to narrowly egg-shaped leaflets, and racemes of 5 to 10 purple flowers.

<i>Swainsona burkittii</i> Species of plant endemic to Australia

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 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.

<i>Swainsona elegans</i> Species of legume

Swainsona elegans is a species of flowering plant in the family Fabaceae and is endemic to Western Australia. It is a prostrate or ascending annual with imparipinnate leaves, usually with 7 to 15 egg-shaped or elliptic leaflets, and racemes of up to 15 blue or reddish-purple flowers.

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 fraseri is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is a perennial plant with imparipinnate leaves with mostly 21 to 24 ellipitic leaflets, and racemes of 20 or more pink to purple flowers.

Swainsona gracilis is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a prostrate or ascending perennial herb with imparipinnate leaves with up to 15 wedge-shaped or narrowly oblong leaflets, and racemes of up to 4 purple or blue 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 kingii is a species of flowering plant in the family Fabaceae and is native to Western Australia and South 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.

<i>Swainsona laciniata</i> Species of legume

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.

Swainsona leeana is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Australia. It is a small prostrate perennial, possible perennial with imparipinnate leaves with 5 to 7 broadly egg-shaped or elliptic leaflets, and racemes of up to 3 purple or yellow flowers.

Swainsona luteola is a species of flowering plant in the family Fabaceae and is endemic to the eastern Australia. It is a prostrate or low-lying to semi-erect perennial with imparipinnate leaves with usually 3 to 17 narrowly elliptic leaflets, and racemes of 5 to 15 purple, sometimes yellow flowers.

Swainsona microcalyx, commonly known as wild violet, is a species of flowering plant in the family Fabaceae and is endemic to southern mainland Australia. It is a prostrate or low-growing perennial herb, with imparipinnate leaves with 5 to 9 broadly egg-shaped to wedge-shaped leaflets and racemes of 5 to 15 purple flowers.

<i>Swainsona oligophylla</i> Species of legume

Swainsona oligophylla is a species of flowering plant in the family Fabaceae and is endemic to central Australia. It is usually a prostrate perennial plant with imparipinnate leaves with 5 to 7 egg-shaped leaflets, the narrower end towards the base, and racemes of 3 to 7 purple flowers.

Swainsona oliveri is a species of flowering plant in the family Fabaceae and is endemic to south-western Australia. It is a slender, prostrate to ascending annual or perennial herb with imparipinnate leaves with 9 to 13 narrowly egg-shaped leaflets, the narrower end towards the base, and racemes of up to 4 cream-coloured to yellow flowers, sometimes with a pink tinge.

References

  1. 1 2 "Swainsona oroboides". Australian Plant Census. Retrieved 19 April 2024.
  2. 1 2 3 "Swainsona oroboides". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. 1 2 3 Thompson, Joy; James, Teresa A. "Swainsona oroboides". Royal Botanic Garden Sydney. Retrieved 19 April 2024.
  4. 1 2 3 Thonpson, Joy (1993). "A revision of the genus Swainsona (Fabaceae)". Telopea. 5 (3): 514–516. Retrieved 19 April 2024.
  5. 1 2 "Swainsona oroboides". State Herbarium of South Australia. Retrieved 19 April 2024.
  6. ↑ "Swainsona oroboides". Australian Plant Name Index. Retrieved 19 April 2024.
  7. ↑ Bentham, George (1864). Flora Australiensis. London: Lovell Reeve & Co. p. 222. Retrieved 19 April 2024.
  8. ↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 267. ISBN   9780958034180.
  9. ↑ "Swainsona oroboides". Northern Territory Government. Retrieved 19 April 2024.
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