Swainsona cornuta

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Swainsona cornuta
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. cornuta
Binomial name
Swainsona cornuta

Swainsona cornuta is a species of flowering plant in the family Fabaceae and is endemic to the west of Western Australia. It is a low-lying, annual or perennial herb with imparipinnate leaves usually with about 7 elliptic leaflets and racemes of 3 to 7 purple flowers.

Contents

Description

Swainsona cornuta is a low-lying annual or perennial herb, usually less than 20 cm (7.9 in) high, its stems covered with long, fine hairs uo to 0.75 mm (0.030 in) long. Its leaves are imparipinnate, less than 50 mm (2.0 in) long, sometimes with stipules up to 10 mm (0.39 in) long at the base of the petiole. There are about 7 elliptic leaflets up to about 10 mm (0.39 in) and 5 mm (0.20 in) wide. The flowers are purple, arranged in racemes up to 150 mm (5.9 in) or more long, with 3 to 7, each flower 10–15 mm (0.39–0.59 in) long on a softly-hairy peduncle 1 mm (0.039 in) long. The sepals are joined at the base, forming a tube about 15 mm (0.59 in) long with the sepal lobes much longer than the sepal tube. The standard petal is 10–15 mm (0.39–0.59 in) long and 8–12 mm (0.31–0.47 in) long, the wings 7–8 mm (0.28–0.31 in) long, and the keel 8–9 mm (0.31–0.35 in) long. Flowering has been observed August. [2] [3]

Taxonomy and naming

Swainsona cornuta was first formally described in 1990 by Joy Thompson in the journal Telopea , from a specimen collected near the 850km post on the North West Coastal Highway in 1972. [2] [4] The specific epithet (cornuta) means "horned", referring to the projections on the keel petal. [2]

Distribution and habitat

This species grows in red clay in the Carnarvon and Murchison bioregions in the west of Western Australia. [2] [3]

Related Research Articles

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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.

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

Swainsona beasleyana is a species of flowering plant in the family Fabaceae and is endemic to inland areas of Western Australia. It is a low-lying perennial herb with imparipinnate leaves usually with 15 to 19 egg-shaped leaflets with the narrower end towards the base, and racemes of 3 to 8 pale or dark 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.

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 cadellii is a species of flowering plant in the family Fabaceae and is endemic to inland New South Wales. It is a shrubby perennial with imparipinnate leaves usually with 5 to 15 mostly narrowly egg-shaped leaflets, and racemes of 15 to 20 white, pink or purple flowers.

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

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 dictyocarpa is a species of flowering plant in the family Fabaceae and is endemic to central areas of South Australia. It is a small erect perennial herb with imparipinnate leaves with 3 to 7 elliptic leaflets, and racemes of purple flowers in racemes of 2 to 6.

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.

<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 pedunculata is a species of flowering plant in the family Fabaceae and is endemic to inland areas of Western Australia. It is a small, ascending annual herb with imparipinnate leaves with 3 to 7 narrowly elliptic or lance-shaped leaflets, and racemes of 2 to 3 purple flowers.

Swainsona perlonga is a species of flowering plant in the family Fabaceae and is endemic to inland parts of the south-west of Western Australia. It is a scrambling perennial herb with imparipinnate leaves with 7 to 13 egg-shaped or almost round leaflets, and racemes of 7 to 10 purple to lilac-pink flowers.

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

Swainsona purpurea, commonly known as purple Swainson-pea or purple Darling pea, is a species of flowering plant in the family Fabaceae and is endemic to arid areas of inland Australia. It is an erect or spreading annual or perennial plant with imparipinnate leaves with 3 to 11 mostly linear or elliptic leaflets, and racemes of 3 to about 20 purple flowers.

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

Swainsona queenslandica, commonly known as smooth Darling pea, is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is a perennial herb with imparipinnate leaves with 19 to 25 egg-shaped leaflets with the narrower end toward the base, and racemes of about 20 white, pinkish to orange red or dark red flowers.

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

Swainsona similis is a species of flowering plant in the family Fabaceae and is endemic to inland eastern Australia. It is an erect or spreading perennial plant with imparipinnate leaves with 5 to 15 narrowly elliptic leaflets and racemes of 5 to 15 purple flowers.

Swainsona tanamiensis is a species of flowering plant in the family Fabaceae and is endemic to north-western Australia. It is a prostrate or erect perennial plant with imparipinnate leaves with 5 to 13 broadly egg-shaped to elliptic, or almost round leaflets, and racemes of up to 8 purple flowers.

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

Swainsona tenuis is a species of flowering plant in the family Fabaceae and is endemic to western continental Australia. It is a prostrate perennial herb with many stems, imparipinnate leaves with 5 to 9 egg-shaped leaflets with the narrower end towards the base, to linear or elliptic leaflets, and racemes of up to 7 purple flowers.

<i>Swainsona tephrotricha</i> Species of flowering plant

Swainsona tephrotricha is a species of flowering plant in the family Fabaceae and is endemic to eastern South Australia. It is an erect or ascending perennial plant, with imparipinnate leaves with 7 to 19 broadly egg-shaped to narrowly elliptic leaflets, and racemes of 30 or more pink or pinkish-purple flowers.

References

  1. ↑ "Swainsona cornuta". Australian Plant Census. Retrieved 24 November 2023.
  2. 1 2 3 4 Thompson, Joy (1993). "A revision of the genus Swainsona (Fabaceae)". Telopea. 5 (3): 471–472. Retrieved 24 November 2023.
  3. 1 2 "Swainsona cornuta". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. ↑ "Swainsona cornuta". Australian Plant Name Index. Retrieved 24 November 2023.
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