Grevillea 'Golden Lyre'
Grevillea 'Golden Lyre' is a spectacular hybrid originating from Fairhill Nursery in Queensland and is a manipulated hybrid between G.formosa (widespread in the Kakadu area of the Northern Territory) and G. 'Honey Gem' (a Queensland hybrid, common in cultivation). It was unfortunate that it was called 'Golden Lyre' as it cannot be registered with the Australian Cultivar Registration Authority as there is already a Grevillea 'Poorinda Golden Lyre' registered with them (see the ACRA website for more details) - make sure which one you are purchasing, as they are very different plants.
I have been growing this plant for about five years (in my northern Sydney suburb of Westleigh garden). It is 1.5 metres high by about 3 metres wide and is stunning when it flowers during late summer and autumn. The many bright yellow terminal flowers can be up to 20 to 25 cms long and are literally dripping with honey.
In warmer areas, north of Sydney (it will not tolerate a situation that is cold and receives winter frosts) it can grow to approximately 2 to 3 metres high by up to 4 to 6 metres wide if given full sun and some summer moisture. To prevent my plant from reaching any where near that size, I prune it back hard in early spring.
If you have the space and would like to grow a plant that produces stunning yellow flowers then Grevillea 'Golden Lyre' is the one.
Australian Plants online - 2008
Association of Societies for Growing Australian Plants