Descriptions of Registered Cultivars
ORIGIN: This cultivar is a prostrate form of B.integrifolia raised from seed at Austraflora Nurseries in 1973. The name refers to the arching prostrate branches of the cultivar, with the last name alluding to the fact that B. integrifolia is a coastal species. The cultivar was first received by the Authority in June 1987. Registration applied for by Austraflora Nurseries, Montrose, Victoria.
DESCRIPTION: The cultivar is basically prostrate spreading to 4m wide. The central stem rises to ca. 100-150 mm from which point the branches arch out. Occasional branches arch up to 150 mm tall. The leaves are wedge shaped with toothed margins and are from 50-70 mm long. The new growth is a bronzy green. The flower spikes are lemon yellow and 90-110 mm long by 60-70 mm inside. The flowering season is autumn and winter.
DIAGNOSIS: B. 'Roller Coaster' can be distinguished by its prostrate form.
CULTIVATION NOTES: This cultivar is a useful species for semi arid conditions and may also be used for beach reclamation and erosion control. It is adaptable to a wide range of soils and positions. B. 'Roller Coaster' is hardy to light frosts and is drought tolerant, though responds well to water in dry periods.
PREVIOUS PUBLICATION: "Encyclopaedia of Australian Plants" by W R Elliott and D Jones 1982 p.294 and "The Austraflora Handbook" 1984 p. 16. Both these references refer to the cultivar as B integrifolia (prostrate).
COLOUR CODE: RHS Colour Chart 1966
perianth: Greyed Yellow Group 161B
style: Yellow Group 11B
ACRA REFERENCES: ACC404, ACRA260, CBG8703132
ACCEPTED FOR REGISTRATION ON: 8 October 1990