CALLISTEMON—Bottle-Brush Tree (Calliste’mon). Tender evergreen flowering shrubs from Australia which belong to the Myrtle family, Myrtaceae. They are well adapted for growing outdoors in California and in similar mild climates and for greenhouse cultivation elsewhere. They have narrow, dark-green, leathery leaves, which are slightly aromatic when crushed. The flowers are densely packed in terminal cylindrical spikes resembling a bottle brush […]