Swainsona unifoliolata

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Swainsona unifoliolata
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. unifoliolata
Binomial name
Swainsona unifoliolata
Synonyms [1]

Swainsonia unifoliolataF.Muell. orth. var.

Swainsona unifoliolata is a species of flowering plant in the family Fabaceae and is endemic to Central Australia. It is an erect or ascending perennial plant, usually with one leaflet and racemes of about 4 to 15 purple flowers.

Contents

Description

Swainsona unifoliolata is an erect or ascending perennial herb up to 30 cm (12 in) high with leaves 10–70 mm (0.39–2.76 in) long with a single leaflet, or occasionally 3 leaflets, the leaflets egg-shaped, mostly 10–26 mm (0.39–1.02 in) long and 5–15 mm (0.20–0.59 in) wide. There is a stipule 3–5 mm (0.12–0.20 in) long at the base of the petiole. The flowers are arranged in racemes with 4 to 15 flowers on a peduncle 0.5–1.5 mm (0.020–0.059 in) wide, each flower 6–10 mm (0.24–0.39 in) long on a hairy pedicel usually 2 mm (0.079 in) long. The sepals are joined at the base, forming a tube 1.5–2.0 mm (0.059–0.079 in) long, the sepal lobes about the same length the tube. The petals are purple, the standard petal 7–13 mm (0.28–0.51 in) long and 6–11 mm (0.24–0.43 in) wide, the wings 7–10 mm (0.28–0.39 in) long, and the keel about 7–10 mm (0.28–0.39 in) long and 2–3 mm (0.079–0.118 in) deep. The fruit is narrowly elliptic and often curved, 20–25 mm (0.79–0.98 in) long and 2–4 mm (0.079–0.157 in) wide, with the remains of the curved or coiled style about 3–4 mm (0.12–0.16 in) long. [2] Flowering occurs from April to October. [3]

Taxonomy

Swainsona unifoliolata was first formally described in 1874 by Ferdinand von Mueller in his Fragmenta Phytographiae Australiae . [4] [5] The specific epithet (unifoliolata) means "having one leaflet". [6]

Distribution and habitat

This species of pea grows on gypsum or limestone on salt flats and the edges of salt lakes in the Avon Wheatbelt, Central Ranges, Gibson Desert, Great Sandy Desert, Great Victoria Desert, Little Sandy Desert, Murchison, Pilbara and Tanami bioregions of inland Western Australia, South Australia, and Finke, Great Sandy Desert, MacDonnell Ranges, Simpson Strzelecki Dunefields and Tanami bioregions of southern Northern Territory. [3] [7]

Related Research Articles

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

Swainsona procumbens, commonly known as Broughton pea or swamp pea is a species of flowering plant in the pea family (Fabaceae), and is native to Australia. It is a spreading or ascending perennial shrub-like herb with imparipinnate leaves with 15 to 25 linear to narrowly lance-shaped leaflets with the narrower end towards the base, and racemes of 2 to 12 purple or mauve to pink flowers.

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

Swainsona stenodonta is a species of flowering plant in the family Fabaceae and is endemic to the north-west of Western Australia. It is an erect annual herb, with imparipinnate leaves with 7 to 13 narrowly linear or oblong leaflets, and racemes of up to 30 or more dark brownish-red to dark purple flowers.

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

Swainsona colutoides, commonly known as bladder senna or bladder vetch, is a species of flowering plant in the family Fabaceae and is endemic to arid areas of Australia. It is an erect annual, shrub-like herb, with imparipinnate leaves usually with up to 13 to 17 egg-shaped leaflets with the narrower end towards the base, and racemes of 10 to 20 purple flowers.

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

Swainsona maccullochiana, commonly known as Ashburton pea, is a species of flowering plant in the family Fabaceae. It is an upright annual with purple-reddish, pink or bluish pea-like flowers from spring to summer and is endemic to Western Australia.

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

Swainsona canescens, commonly known as grey swainsona, is a flowering plant in the family Fabaceae. It is a small perennial herb with pink-purple or purple, yellow and green flowers and grows in Queensland, Western Australia and South Australia.

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 decurrens is a species of flowering plant in the family Fabaceae and is endemic to northern inland areas of Australia. It is an erect annual with imparipinnate leaves usually with 15 to 19 narrowly elliptical leaflets and racemes of 20 to 30 red or 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 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 longicarinata is a prostrate or ascending perennial herb in the pea family and is endemic to the far west of Western Australia. It has 5 to 11 variably-shaped leaflets, and racemes of about 7, usually purple flowers.

Swainsona luteola, commonly known as dwarf Darling pea, 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 paucifoliolata is a prostrate, spreading or scrambling perennial herb in the family Fabaceae and is endemic to inland areas in the north of Western Australia. It has 3 to 7 usually narrowly lance-shaped leaflets, and racemes of 3 to 16 purple 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 plagiotropis, commonly known as red swainsona-pea is a species of flowering plant in the family Fabaceae and is endemic to eastern continental Australia. It is a prostrate or ascending perennial herb with imparipinnate leaves with 13 to 25 narrowly egg-shaped or narrowly lance-shaped leaflets and racemes of 2 to 5 reddish-purple flowers.

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

Swainsona pterostylis is a species of flowering plant in the family Fabaceae and is endemic to northern parts of Western Australia. It is a low-growing or prostrate perennial herb, with imparipinnate leaves with mostly 11 to 19 broadly elliptic leaflets, and racemes of 5 to more than 30 purple or violet flowers.

Swainsona rostellata is a species of flowering plant in the family Fabaceae and is endemic to inland areas of Western Australia. It is a prostrate perennial herb with imparipinnate leaves with 7 to 13 wedge-shaped leaflets, and racemes of usually up to 3 purple flowers.

Swainsona rotunda is a species of flowering plant in the family Fabaceae and is endemic to inland areas of northern Western Australia. It is a prostrate herb with imparipinnate leaves with about 7 narrowly lance-shaped leaflets, and racemes of up to 4 lilac-coloured 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.

References

  1. 1 2 "Swainsona tephrotricha". Australian Plant Census. Retrieved 20 June 2024.
  2. ↑ Thompson, Joy (1993). "A revision of the genus Swainsona (Fabaceae)". Telopea. 5 (3): 495–496. Retrieved 16 June 2024.
  3. 1 2 "Swainsona unifoliolata". Northern Territory Government. Retrieved 20 June 2024.
  4. ↑ "Swainsona unifoliolata". Australian Plant Name Index. Retrieved 20 June 2024.
  5. ↑ von Mueller, Ferdinand (1874). Fragmenta Phytographiae Australiae. Melbourne: Victorian Government Printer. p. 226. Retrieved 20 June 2024.
  6. ↑ George, Alex; Sharr, Francis (2021). Western Australian Plant Names and Their Meanings (4th ed.). Kardinya, WA: Four Gables Press. p. 332. ISBN   9780958034180.
  7. ↑ "Swainsona unifoliolata". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions . Retrieved 20 June 2024.
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