Senna sericea

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Senna sericea
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. sericea
Binomial name
Senna sericea
(Symon) Albr. & Symon[1]
Synonyms[1]

Cassia oligophylla var. sericea Symon

Senna sericea is a species of flowering plant in the family Fabaceae and is endemic to inland north-western Australia. It is an erect shrub with pinnate leaves, with one or two pairs of egg-shaped leaflets, and yellow flowers arranged in groups of four to twelve, with ten fertile stamens in each flower.

Description

Senna sericea is an erect shrub that typically grows to a height of 0.3–2 m (1 ft 0 in – 6 ft 7 in). Its leaves are pinnate, 20–50 mm (0.79–1.97 in) long including a petiole 5–15 mm (0.20–0.59 in) long, with one or two pairs of egg-shaped leaflets. The leaflets are 10–40 mm (0.39–1.57 in) long and 10–22 mm (0.39–0.87 in) wide, spaced 3–12 mm (0.12–0.47 in) apart when two pairs of leaflets are present. There are up to three sessile, flat glands between the leaflets. The flowers are yellow and arranged in upper leaf axils in groups of four to twelve on a peduncle 20–30 mm (0.79–1.18 in) long, each flower on a pedicel 10–15 mm (0.39–0.59 in) long. The petals are 8–10 mm (0.31–0.39 in) long and there are ten fertile stamens, the anthers 3–4 mm (0.12–0.16 in) long and of different lengths. Flowering occurs in winter, and the fruit is a flat pod about 70 mm (2.8 in) long and 15–25 mm (0.59–0.98 in) wide.[2][3][4]

Taxonomy and naming

This species was first formally described in 1966 by David Eric Symon, who gave it the name Cassia oligophylla var. sericea in the Transactions of the Royal Society of South Australia from specimens collected at "The Granites" in the Northern Territory.[5] In 2000, David Edward Albrecht and Symon transferred the species to the genus Senna as S. sericea in the Journal of the Adelaide Botanic Gardens.[6] The specific epithet (sericea) means "silky".[7]

Distribution and habitat

Senna sericea grows on gravelly or rocky hills in the western parts of central Northern Territory and in arid parts of Western Australia.[2][4][8]

References

  1. ^ a b "Senna sericea". Australian Plant Census. Retrieved 29 August 2023.
  2. ^ a b "Senna sericea". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. ^ Randell, Barbara R.; Barlow, Bryan A. (1998). Orchard, Anthony E. (ed.). Flora of Australia (PDF). Vol. 12. Canberra: Australian Biological Resources Study. p. 107. ISBN 064306298X. Retrieved 29 August 2023.
  4. ^ a b Albrecht, David E.; Symon, David E. (2000). "A re-evaluation of Cassia oligophylla var. sericea Symon (Caesalpineaceae)". Journal of the Adelaide Botanic Gardens. 19: 95–96. Retrieved 29 August 2023.
  5. ^ "Cassia oligophylla var. sericea". Australian Plant Name Index. Retrieved 29 August 2023.
  6. ^ "Senna sericea". Australian Plant Name Index. Retrieved 29 August 2023.
  7. ^ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 305. ISBN 9780958034180.
  8. ^ "Senna sericea". Northern Territory Government. Retrieved 29 August 2023.
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