Upright dense shrub to 3 m tall. Leaves mostly of 3 linear, soft leaflets. Flowers solitary, axillary, profuse, about 1 cm wide on short stalks, dark or reddish brown or greenish yellow outside and yellowish to pale green inside, extremely fragrant; spring.
WA
The leaves may be used for dyeing.
A variable species with many horticultural forms, thoseunder the Cultivar tab being the most commonly available.
A'Royale' PVJ 9(1)10. ['Compact Form']
Source: (2002). Rutaceae. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.
Boronia megastigma 'Arch Chandler's Red'
Flowers burgundy. ['Chandleri']
A range of minor variants was released from the Chandler Nursery in Melbourne; these possibly date from the early 20th century and include B. 'Arch's Early', B. 'Burgundy', B. 'Early Brown', B.'Pop's Red', B. 'Uncle Jack's Red' and others. Many of these were cited in the first provisional ACRA list of 1966.
Boronia megastigma 'Harlequin'
Flowers striped brown and yellow.
A sport of 'Arch Chandler's Red'. Introduced c. 1982.
Boronia megastigma 'Heaven Scent'
A neat, compact bush to about 1 m tall. Flowers lime-yellow and brown, exceptionally fragrant in spring.
Introduced 1989.
Flowers yellow-green inside and out, the fragrance slightly more lemony than the typical form.
Cultivar originating before 1953.
A cultivar given PBR - see Plant Varieties Journal 9(1): 10.
['Compact Form']