result in decay of the crown of the plant. Although significant problems, fungi are less likely to be the cause of plant morbidity than poor drainage or soil conditions. The larvae of the Macadamia leafminer (Acrocercops chionosema), a moth, burrow along and disfigure the waratah's leaves, and are mainly a problem in lowering the value of cut flower crops. More problematic is the larger caterpillar of another moth, the Macadamia twig girdler Macadamia twig girdler (Xylorycta luteotactella) which can burrow into and disfigure the developing flowerhead. Cultivars A number of natural variants of Telopea speciosissima have been selected for cultivation as follows: Telopea 'Brimstone Blush' is a shrub of smaller size than the species, reaching a metre (3 ft) tall, and was originally found growing on a property of Ben Richards in Oakdale, southwest of Sydney. Flowering takes place in October. The flowerhead is globular with a pink crown and has 160 individual flowers, the styles of which are pink and white towards the ends. Three rows of whorled dark red bracts surround the flowerheads. Telopea 'Cardinal' is a form originally found on the property of Lucille Pope in Werombi, from where it was propagated and made available commercially. The original plant was a vigorous specimen reaching and producing 100 to 120 flowerheads each year. It is named for its large dome-shaped cardinal red flowerheads, which bear 210 individual flowers and are surrounded by two rows of dark red bracts. These blooms have long vase life. Telopea 'Corroboree', a form with longer styles, has compact inflorescences measuring high and wide, and is a vigorous grower. It was selected for commercial propagation in 1974 by Nanette Cuming of Bittern, Victoria, and registered with the Australian Cultivar Registration Authority in 1989. It is grown principally for the cut flower industry. Telopea 'Fire and Brimstone' is a vigorous form with large inflorescences selected by waratah grower and author Paul Nixon of Camden, New South Wales. It is a shrub which may reach 3–4 m tall and 2 m wide, with large leaves with more heavily toothed margins. Each flowerhead is cone-shaped and has up to 240 florets. The stigmas are a light red and tipped with white. The bracts surrounding the flowerheads are relatively small, while the leaves are large and can reach in length. The cultivar is thought to be tetraploid. With a long vase life of 17 days, the cultivar is