Boronia purdieana

Boronia purdieana is a plant in the citrus family, Rutaceae and is endemic to the south-west of Western Australia. It is a shrub with pinnate leaves and yellow, four-petalled flowers arranged singly in leaf axils.

Winter boronia
Boronia purdieana subsp. purdieana in the Australian National Botanic Gardens
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Rutaceae
Genus: Boronia
Species:
B. purdieana
Binomial name
Boronia purdieana
Occurrence data from Australasian Virtual Herbarium

Description

Boronia purdieana is a shrub that grows to a height of 0.3–1.5 m (1–5 ft) with its young stems covered with long, soft leaves. The leaves are 10–20 mm (0.39–0.79 in) long and have five, seven or nine leaflets. The leaflets are linear to narrow oblong or wedge-shaped and 5–8 mm (0.20–0.31 in) long. The flowers are yellow, occasionally red and are arranged singly in leaf axils, each flower on a thin pedicel 3–5 mm (0.12–0.20 in) long. The four sepals are egg-shaped and 2–3 mm (0.079–0.12 in) long. The four petals are broadly egg-shaped 5–8 mm (0.2–0.3 in) long with a rounded end. The four stamens near the sepals have warty filaments and vestigial anthers, whilst the four near the petals have smooth filaments and fertile, reddish brown anthers. Flowering occurs from May to October.[2][3]

Taxonomy and naming

Boronia purdieana was first formally described in 1904 by Ludwig Diels and the description was published in Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie.[4][5] The specific epithet (purdieana) honours Alexander Purdie.[6]

Two subspecies were described in 1998:

  • Boronia purdieana subsp. purdieana with more or less square, not curved anthers about 0.4 mm (0.016 in) long;[7][8][9]
  • Boronia purdieana subsp. calcicola with oblong, curved anthers about 0.8 mm (0.031 in) long.[8][10][11]

Distribution and habitat

Winter boronia grows in swampy areas and on coastal plains and rock outcrops. Subspecies purdieana is found near the west coast between the northern suburbs of Perth and Shark Bay with a disjunct population near Leonora. Subspecies calcicola occurs between Kalbarri National Park and Shark Bay.[8][9][11]

Conservation

Both subspecies of Boronia purdieana are classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.[9][11]

References
  1. "Boronia purdieana". Australian Plant Census. Retrieved 17 March 2019.
  2. Duretto, Marco F.; Wilson, Paul G.; Ladiges, Pauline Y. "Boronia purdieana". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 11 February 2019.
  3. "Boronia purdieana". FloraBase. Western Australian Government Department of Parks and Wildlife.
  4. "Boronia purdieana". APNI. Retrieved 11 February 2019.
  5. Diels, Ludwig; Pritzel, Ernst (1904). "Fragmenta Phytographiae Australiae occidentalis. Beitrage zur Kenntnis der Pflanzen Westaustraliens, ihrer Verbreitung und ihrer Lebensverhaltnisse". Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie. 35 (2): 318. Retrieved 11 February 2019.
  6. "Purdie, Alexander (1859 - 1905)". Australian National Herbarium. Retrieved 11 February 2019.
  7. "Boronia purdieana subsp. purdieana". APNI. Retrieved 11 February 2019.
  8. Wilson, Paul G. (1998). "New names and new tax in the genus Boronia (Rutaceae) from Western Australia with notes on seed characters". Nuytsia. 12 (1): 128–129. Retrieved 11 February 2019.
  9. "Boronia purdieana subsp. purdieana". FloraBase. Western Australian Government Department of Parks and Wildlife.
  10. "Boronia purdieana subsp. calcicola". APNI. Retrieved 11 February 2019.
  11. "Boronia purdieana subsp. calcicola". FloraBase. Western Australian Government Department of Parks and Wildlife.
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