About Callistachys lanceolata Vent.
Callistachys lanceolata Vent. is an erect evergreen tree or shrub that usually grows 1.5 to 7 meters (4 feet 11 inches to 23 feet 0 inches) tall, and has young stems covered in silky hairs. Its leaves are leathery, arranged in whorls (most often three leaves per whorl), and generally have a regular shape, with pointed tips. Leaves range from 40 mm (1.6 in) to 170 mm (6.7 in) long and 4 mm (0.16 in) to 30 mm (1.2 in) wide. It produces conspicuous, attractive inflorescences made up of racemes of yellow flowers, and flowers from September to January. This species is native to the southwestern corner and south coast of Western Australia, where it grows best in damp sandy areas, especially along watercourses, swamps, and culverts. For horticultural use, seeds can be collected from the plant, but the seed-containing pods must be left to dry on the plant before being broken open. Seeds should be scarified before sowing.