Senna curvistyla

Senna curvistyla is a species of flowering plant in the family Fabaceae and is endemic to north-western Australia. It is an undershrub with pinnate leaves with two or three pairs of narrowly elliptic to elliptic leaflets, the flowers yellow and arranged in groups of two or three, with ten fertile stamens in each flower.

Senna curvistyla
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Caesalpinioideae
Genus: Senna
Species:
S. curvistyla
Binomial name
Senna curvistyla
Synonyms[1]
  • Cassia curvistyla J.M.Black
  • Cassia curvistylis J.W.Green orth. var.
  • Cassia oligoclada auct. non F.Muell.: Symon, D.E. (December 1966)

Description

Senna curvistyla is a spreading undershrub that typically grows to a height of 30 cm (12 in) and is softly-hairy apart from the petals and stamens. The leaves are pinnate, 20–30 mm (0.79–1.18 in) long on a petiole 4–6 mm (0.16–0.24 in) long with two or three pairs of narrowly elliptic to elliptic leaflets 5–15 mm (0.20–0.59 in) long, 3–5 mm (0.12–0.20 in) wide and spaced 4–10 mm (0.16–0.39 in) apart. The flowers are yellow and arranged in leaf axils in groups of two or three on a peduncle 10–20 mm (0.39–0.79 in) long, each flower on a pedicel about 2 mm (0.079 in) long. The petals are about 4 mm (0.16 in) long and there are ten fertile stamens, the anthers 4–5 mm (0.16–0.20 in) long. Flowering occurs from January to August, and the fruit is a flat pod 20–25 mm (0.79–0.98 in) long, about 10 mm (0.39 in) wide and straight.[2][3]

Taxonomy

This species was first formally described in 1938 by John McConnell Black who gave it the name Cassia curvistyla in the Transactions of the Royal Society of South Australia from specimens collected near Yundamindera by John Burton Cleland in 1936.[4][5] In 1989, Barbara Rae Randell reclassified the species as Senna curvistyla in the Journal of the Adelaide Botanic Garden.[6] The specific epithet (curvistyla) means "curved style".[7]

Distribution and habitat

Senna curvistyla grows in deep, red desert sand in inland northern Western Australia and the Northern Territory.[2][3][8]

References
  1. "Senna curvistyla". Australian Plant Census. Retrieved 16 June 2023.
  2. "Senna curvistyla". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 16 June 2023.
  3. "Senna curvistyla". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. "Cassia curvistyla". Australian Plant Name Index. Retrieved 16 June 2023.
  5. Black, John McConnell (1938). "Additions to the Flora of South Australia. No. 37". Transactions of the Royal Society of South Australia. 62: 354–355. Retrieved 16 June 2023.
  6. "Senna curvistyla". Australian Plant Name Index. Retrieved 16 June 2023.
  7. Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 175. ISBN 9780958034180.
  8. "Senna curvistyla". Northern Territory Government. Retrieved 16 June 2023.
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