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This article is about a plant genus. For the suburb in Melbourne, Australia, see Boronia, Victoria.
Boronia fraseri Glenbrook.jpg
Boronia fraseri,
Glenbrook Native Plant Reserve, NSW
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Sapindales
Family: Rutaceae
Subfamily: Rutoideae
Genus: Boronia

See text


Cyanothamnus Lindl.

Boronia is a genus of about 160 species of flowering plants in the citrus family Rutaceae family, all of of which are endemic in Australia. They occur in all Australian states but the genus is under review and a number of species are yet to be described or the description published. Boronias are similar to familiar plants in the genera Zieria, Eriostemon and Correa but can be distinguished from them by the number of petals or stamens. Some species have a distinctive fragrance and are popular garden plants.


Plants in the genus Boronia are nearly always shrubs although a very small number occur as herbs or as small trees. The leaves are usually arranged in opposite pairs and may be simple leaves or compound leaves with up to nineteen or more leaflets, in either a pinnate or bipinnate arrangement. The flowers are arranged in groups in the leaf axils or on the ends of the branches and have both male and female parts. There are usually five separate sepals, five separate petals and eight stamens. (In Zieria there are only four stamens, Eriostemon species have five petals and in Correa the petals are joined to form a bell-shaped tube.) There are four carpels with their styles fused and there are two ovules in each carpel.[1][2]

Taxonomy and naming[edit]

The genus Boronia was first formally described in 1798 by James Edward Smith and the description was published in Tracts Relating to Natural History.[3][4] The name Boronia honours "Francesco Borone, assistant of John Sibthorp, when the latter was collecting material in Greece for the composition of his Flora graeca."[5]

Boronia, an outer suburb of Melbourne in Australia was named after a boronia found growing in the area.

Distribution and habitat[edit]

Boronias are found in all states and mainland territories of Australia and generally grow in open forests or woodlands, only rarely in rainforests or arid areas.[1][2]

Use in horticulture[edit]

Boronias, especially B. megastigma, are known for their perfumed flowers. Unfortunately, they are generally somewhat difficult to grow in cultivation. All species require excellent drainage and part shade.[6]

Species include:


  1. ^ a b Weston, Peter H.; Duretto, Marco. "Genus Boronia". Royal Botanic Garden Sydney: plantnet. Retrieved 17 October 2016. 
  2. ^ a b "The Boronia family". Australian Native Plants Society Australia. Retrieved 17 October 2016. 
  3. ^ "Boronia". APNI. Retrieved 17 October 2016. 
  4. ^ Smith, James Edward (1798). Tracts relating to natural history. London. p. 288. Retrieved 17 October 2016. 
  5. ^ "Boronia Sm.". APNI. Retrieved 17 October 2016. 
  6. ^ "The Boronia Family - cultivation". Australian Native Plants Society Australia. Retrieved 17 October 2016.