Leaves opposite, decussate, often laterally compressed, so that the leaf is thicker than wide, linear to terete to ± oblanceolate in side view.
Inflorescence consisting of single flowers in the upper leaf axils of undifferentiated shoots, or sometimes flowers condensed into a corymbose head or a 1–4-flowered axillary pseudoinflorescence; flowers enclosed by 2 bracteoles in bud, caducous or persisting until flower opens. Flowers 5-merous, yellow or white to orange or red. Hypanthium extending above the ovary; mostly 5-ribbed. Sepals undivided or with 2–12 slender laciniate lobes or projections. Stamens 10, alternating with 10 staminodes; anthers globose, opening by terminal pores. Ovary half-inferior, 1-locular, placentation basal, ovules 2–10; style projecting from flower, bearing a ring of hairs below stigma.
Fruit enclosed in hypanthium, only slightly enlarged from flower, indehiscent; seeds 1 or 2.
Distribution and occurrence: World: 31 spp., endemic Aust., Qld, N.S.W., S.A.
Text by G.J. Harden
Taxon concept: Key adapted from Copeland et al. 2011
Taxa not yet included in identification key