Leionema equestre
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Rutaceae
Genus: Leionema
Species:
L. equestre
Binomial name
Leionema equestre
(D.A.Cooke) Paul G.Wilson[1]

Leionema equestre, commonly known as Kangaroo Island phebalium,[2] is a shrub species that is endemic to South Australia. It is a small spreading shrub with rough, green leaves and whitish-pink flowers from late winter to October.

Description

Leionema equestre is a small shrub to 30 cm (12 in) high with wide-spreading green stems becoming reddish, branchlets more or less terete, thin, smooth and covered with minute, soft, upright, star-shaped hairs. The leaves are flat, saddle-shaped, rough, circular, 1–3.5 mm (0.039–0.138 in) long, 2–4 mm (0.079–0.157 in) wide, heart-shaped at the base, smooth margins and edges rolled upward. The flowers are single or in a small cluster of 2 or 3, sessile, each flower on a slender, reddish stem 2–4 mm (0.079–0.157 in) long at the end of branchlets. The calyx lobes are triangular shaped and about 0.3 mm (0.012 in) long. The flower petals spreading, separated, smooth, narrowly elliptic, pink and darkening toward a pointed tip. The 10 stamens are in a two row formation, upright, mostly light yellow or occasionally pink. The flower buds pink, 2.3–3 mm (0.091–0.118 in) long, oval-shaped with a rounded apex. The fruit about 3 mm (0.12 in) long, sparsely covered in short, soft, star-shaped hairs and ending in a small point. Flowering occurs from August to October.[3][4]

Taxonomy and naming

Kangaroo Island phebalium was first formally described as Phebalium equestre but the genus was changed to Leionema equestre in 1998 by Paul G. Wilson and the description was published in the journal Nuytsia.[5][6] The specific epithet equestre is derived from Latin meaning belonging to horsemen, in reference to the shape of the leaves.[3]

Distribution

This species has a restricted distribution, only found on Kangaroo Island South Australia.

Conservation status

Leionema equestre is classified as "endangered" by the Government of South Australia Environment Protection and Biodiversity Conservation Act 1999.[2]

References

  1. ↑ "Leionema equestre". Australian Plant Census. Retrieved 2 May 2020.
  2. 1 2 "Leionema equestre". Species Profile and Threats Database. South Australian Department of Environment & Heritage. Retrieved 6 May 2020.
  3. 1 2 Cooke, D.A (1987). "Phebalium equestre". Journal of the Adelaide Botanic Gardens. 10 (2): 241–244. JSTOR 23874068.
  4. ↑ Wilson, Paul G. (1999). Flora of Australia-Meliaceae, Rutaceae, Zygophyllaceae (PDF). Canberra/Melbourne: ABRS-Commonwealth of Australia Department of Environment & Heritage. pp. 440–441. ISBN 9780643109551.
  5. ↑ Wilson, Paul G. (1998). "Leionema equestre". Nuytsia. 12 (2): 274. Retrieved 6 May 2020.
  6. ↑ "Leionema equestre". Australian Plant Census. Retrieved 6 May 2020.
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