A genus of shrubs and trees that have alternate, rigid leaves, which are often glabrous and aromatic, or silky. The flowers are held in crowded axillary clusters or racemes and are bisexual, paired, and on stalks. The bud scales are papery, folded, and conspicuous, but fall early. The perianth segments are irregular and in the bud are fused into a tube, but later the lobes are free and spreading. The stamens are found at the base of some of the perianth blades. The ovary is unilocular with 2 ovules, and the style protrudes from the perianth. The fruit is a woody capsule, and the seeds are slightly convex with a broad terminal wing. There are about 125 species, endemic (see endemism) to Australia.
Subjects: Plant Sciences and Forestry.