Australian Cultivar Registration Authority

This cultivar grows to about 1m tall by up to 1m wide. It is a dense bush and very floriferous. The main flowering season is from August to December though occasional flowers are found throughout the year. The flowers are up to 10mm across and are pink in colour. Diagnosis: B. muelleri 'Sunset Serenade' can be distinguished from other forms of B. muelleri by its smaller stature, denser habit and greater floriferousness.

This cultivar is a moderately dense upright shrub, growing from 1-4 metres tall, but usually is 2m tall by 1.5m wide. The foliage is a very dark green. The flowers occur in mid spring (late October to early November in Sydney), are pink in colour aging to a deep red. The petals last for a long period. Diagnosis: Boronia 'Carousel': An upright shrub 1-4 metres tall by 1.5m wide. Leaves pinnate to 35mm long, leaflets to 10mm long, dark green and mainly glabrous (some scattered hairs along main vein). Flowers bell shaped, ca. 8mm long, solitary, petals bright pink aging to deep red. Flowers October-November. Boronia heterophylla (Red or Kalgan Boronia): An upright, bushy shrub to 3m tall by 2m wide though usually smaller and narrower. Leaves pinnate or simple to 50mm long, leaflets to 30mm long, dark green and glabrous. Flowers bell shaped, ca. 10mm long, solitary, petals reddish-pink and fade as they age, slightly fragrant. Flowers can be found between August-November. Boronia molloyae (Tall Boronia): An upright to spreading shrub 1-4m tall by 1-2m wide. Leaves pinnate, 20-50mm long, dark green and hairy, aromatic. Flowers bell like, ca. 5mm long, solitary, pinkish-red, not fading with age. Flowers October-January The main characteristics of importance are the length of time the flowers are held and the retention of the colour of the flowers as they age.

Small shrub. Leaves strongly fragrant (citronella), 7-11 lobed, to 2.5cm long. Leaflets 8 - 10 mm long, oil glands on upper surface, small hairs (sparse) on margins. Flowers usually 4 petals, 4 stamens and 4 carpels but occasionally 5 petals, 9 stamens and 5 carpels. Diagnosis: Boronia 'Tyalge Ruby' differs from B. muellerii by having smaller but strongly fragrant leaves, like B. citriodora. It differs from B. pilosa in having fragrant leaves. It has smaller leaves than B. citriodora and B. pinnata. It has larger leaves than B. citrata and B. 'Sunset Serenade' but is also more fragrant than the latter.

This cultivar grows to 0.6m tall by 0.6m wide and is very dense. The flowers are double and deep pink in colour. The flowering period is from late winter to spring in Melbourne. Diagnosis: The cultivar can be distinguished by the double flowers and its noticeably denser growth habit.

This cultivar will grow from 9 to 10m tall. The mature leaves have prominent lobes and are maple like in shape. Mature leaves are up to 12cm broad at their widest point and are distinctly veined. The flowers, found from approximately November to March, are pink in colour and very conspicuous. They are slightly hairy, with the hairs being a light rusty brown colour. The underside of the calyx is mottled with white. Diagnosis: Brachychiton 'Griffith Pink' differs from Brachychiton 'Jerilderie Red', a similar cultivar in that the flowers are larger and a deeper colour and the leaves are lobed. The leaves of Brachychiton 'Griffith Pink' are smaller than B. discolour.

This cultivar is a tree ca. 9m tall by 6.5m wide. The canopy is dense. The leaves vary somewhat in size but have the long, slender petiole. They are a dull green in colour. The leaves are simple, lanceolate with an acuminate apex (1). The flower panicles are densely packed with dull red flowers. When in bud the calyx is covered in brownish stellate hairs which gradually diminish as the flower ages. The calyx is mottled red and white on the inside. Flowers are found during the summer months. Diagnosis: The venation of the leaves is very similar to that of B. acerifolius with the ends of the lateral veins dividing and curved along the leaf margins. Leaves are generally intermediate in size between those of the parents. The leaf apices are long and acuminate compared to the more acute apex of B. acerifolius. The petioles are long and slender as in B. populneus. The calyx is a dull red covered with stellate hairs when young, gradually diminishing as the flowers age. The bright red calyx of B. acerifolius is glabrous while the cream calyx of B. populneus is pubescent outside. The fruits are from 6 to 8cm long while mature fruits of B. acerifolius are ca. 12cm long and 4 to 7cm long in B. populneus. The general morphology of the cultivar is as for B. populneus.

This cultivar grows to ca.200m tall by up to 800m wide. The heads are a deep mauve in colour and up to 20mm across. Diagnosis: B. 'Breakoday' has a more compact habit and heads with deeper coloured ray flowers than the more usual form of the species. It is also immediately distinct because of its darker and broader leaf lobes.

Note: Formerly B. 'Telopea Star' This cultivar grows to plus/minus 1m tall by plus/minus 60cm wide. It is fast growing, has an erect habit, and has quite long distances (6-8cm) between nodes. These long internodal distances can tend to make the shrub look sparse. The cultivar has round stems, and the newer growth has a covering of fine brown hairs. The leaves are pinnate and glabrous, with the leaflets being from plus/minus 2.5cm long by plus/minus .7cm wide. The terminal leaflet is longer, being from plus/minus 3.5cm long by plus/minus 1cm wide. The leaflets are oblong-elliptical to lanceolate in shape. The flowers are borne in umbels of 3-6 flowers either terminally on the branchlets or in the leaf axils. They are pink in colour and star-shaped and open well to plus/minus 1.5cm in diameter. Flowers are profuse in the spring but odd flowers are found during most of the year. Diagnosis: This cultivar has only a light covering of brownish hairs on the newer growth and the leaves are glabrous. B. mollis has a denser covering of hairs on the new growth which extends for some distance down the stems. The leaves on B. mollis have stellate hairs on the under side of the leaves. The leaves of the cultivar when checked against specimens of B. mollis are generally much larger. Whereas B. fraseri has many trifoliate leaves, the leaves of the cultivar are truly pinnate. B. 'Telopea Valley Star' has the long internodes of B. mollis. B. fraseri has much more compact internodal distances, while B. fraseri has square sectioned stems. The cultivar is more robust than either of its purported parents. Comparators: Boronia mollis NBG 006544, 002848; B. fraseri NBG 065889, 065890.

Boronia megastigma 'Virtuoso' is a colour form of B. megastigma differing from the norm in the very dark to near black coloured outside of the petals, anthers and carpel. The flowering period and form of the cultivar in all other respects is the same as for B. megastigma.