A genus of shrubs and some herbs in which the small leaves are opposite or widely spaced along the stem. The bisexual flowers are protandrous (see protandry), held in terminal or axillary heads, and are rarely solitary. The calyx is fused and cylindrical with 4 lobes, the 2 stamens being attached to the tube. The ovary is unilocular and the small fruit is enclosed in the base of the calyx. The seeds contain no endosperm but have a tough testa. There are about 80 species, found only in New Zealand and Australia.
Subjects: Plant Sciences and Forestry.