Boronia clavata

Boronia clavata, commonly known as Bremer boronia,[2] is a plant in the citrus family, Rutaceae and is endemic to the south-west of Western Australia. It is a shrub with bipinnate leaves and pale, yellowish green, four-petalled flowers.

Bremer boronia
Boronia clavata in Kings Park Botanic Gardens
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Rutaceae
Genus: Boronia
Species:
B. clavata
Binomial name
Boronia clavata

Description

Boronia clavata is a shrub that grows to a height of 1–2 m (3.3–6.6 ft) with its stems covered with short, soft hairs. The leaves are mostly pinnate with between three and seven linear to wedge-shaped leaflets 10–20 mm (0.39–0.79 in) long. The flowers are pale yellowish green and arranged single in leaf axils on a pedicel about 3 mm (0.12 in) long. The four sepals are egg-shaped to narrow triangular, 2–3 mm (0.08–0.1 in) long and covered with short, soft hairs. The four petals are egg-shaped with the narrower end towards the base, about 8 mm (0.3 in) long. The eight stamens are club-shaped and alternate in length, those adjacent to the petals are shorter than those adjacent to the sepals. Flowering occurs from August to October and the fruit are glabrous and about 4 mm (0.16 in) long and 1 mm (0.039 in) wide.[3][4]

Taxonomy and naming

Boronia clavata was first formally described in 1971 by Paul Wilson and the description was published in Nuytsia from a specimen collected near the Bremer River by Kenneth Newbey.[5][6] The specific epithet (clavata) is derived from the Latin word clava meaning "club".[7]

Distribution and habitat

Bremer boronia grows on floodplains and river banks in thickets with other shrubs. It is only known from near Bremer Bay.[3][2]

Conservation

Boronia clavata is classified as "endangered" under the Environment Protection and Biodiversity Conservation Act 1999 and as "Threatened Flora (Declared Rare Flora — Extant)" by the Department of Environment and Conservation (Western Australia).[2][4]

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References
  1. "Boronia clavata". Australian Plant Census. Retrieved 15 March 2020.
  2. "Approved Conservation Advice for Boronia clavata (Bremer Boronia)" (PDF). Australian Government Department of the Environment. Retrieved 27 January 2019.
  3. Wilson, Paul G. (1971). "Taxonomic notes on the family Rutaceae, principally of Western Australia". Nuytsia. 1 (2): 199. Retrieved 27 January 2019.
  4. "Boronia clavata". FloraBase. Western Australian Government Department of Parks and Wildlife.
  5. "Boronia clavata". APNI. Retrieved 27 January 2019.
  6. "Newbey, Kenneth Ramond (1936 - 1988)". Australian National Herbarium. Retrieved 27 January 2019.
  7. Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 213.
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