Cyanothamnus penicillatus

Cyanothamnus penicillatus is a plant in the citrus family, Rutaceae and is endemic to the south-west of Western Australia. It is a low, spreading shrub with pinnate leaves and white flowers with four petals and eight stamens.

Cyanothamnus penicillatus
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Rutaceae
Genus: Cyanothamnus
Species:
C. penicillatus
Binomial name
Cyanothamnus penicillatus
(Benth.) Duretto & Heslewood[1]
Occurrence data from Australasian Virtual Herbarium
Synonyms[1]

Boronia penicillata Benth.

Description

Cyanothamnus penicillatus is a spreading shrub that grows to a height of 30 cm (10 in). The leaves are sessile and pinnate with three or five leaflets, each leaflet linear to narrow wedge-shaped and 5–12 mm (0.2–0.5 in) long. The flowers are borne singly in leaf axils on a pedicel 1–2 mm (0.04–0.08 in) long. The four sepals are egg-shaped, 1.5–2 mm (0.059–0.079 in) long and the four petals are white and 2–3.5 mm (0.079–0.14 in) long. The eight stamens are slightly hairy and there is a very short point on the end of the anthers. Flowering occurs mainly from October to November.[2][3]

Taxonomy and naming

This species was first formally described in 1863 by George Bentham who gave it the name Boronia penicillata in Flora Australiensis from a specimen collected by James Drummond.[4][5] In a 2013 paper in the journal Taxon, Marco Duretto and others changed the name to Cyanothamnus anemonifolus on the basis of cladistic analysis.[6] The specific epithet (penicillatus) is derived from the Latin word penicillum meaning "little tail", "painter's brush" or "tuft".[7]

Distribution and habitat

This boronia grows in sand and has a disjunct distribution between Toodyay and the Fitzgerald River.[2]

Conservation

Cyanothamnus penicillatus is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.[3]

References
  1. "Cyanothamnus penicillatus". Plants of the World Online. Retrieved 21 September 2021.
  2. Duretto, Marco F.; Wilson, Paul G.; Ladiges, Pauline Y. "Boronia penicillata". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 11 April 2019.
  3. "Cyanothamnus penicillatus". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. "Boronia penicillata". APNI. Retrieved 11 April 2019.
  5. Bentham, George; von Mueller, Ferdinand (1863). Flora Australiensis. Vol. 1. London: Lovell Reeve & Co. p. 322. Retrieved 11 April 2019.
  6. Duretto, Marco F.; Heslewood, Margaret M.; Bayly, Michael J. (2020). "Boronia (Rutaceae) is polyphyletic: Reinstating Cyanothamnus and the problems associated with inappropriately defined outgroups". Taxon. 69 (3): 481–499. doi:10.1002/tax.12242. S2CID 225836058.
  7. Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 173.
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