Leaves opposite, margins entire, crenate or finely ciliate-toothed, shortly petiolate.
Inflorescences axillary, 1-flowered. Flowers 5-merous, white; bracteoles 2, caducous or persistent. Calyx persistent in fruit. Petals free. Stamens 4–12; anthers opeining by longitudinal slits, gland-tipped. Ovary half-inferior, (1-)2-(-3) locular; placentation axile; stigma capitate.
| | Key to the species | |
| 1 | Leaves linear, >6 times long as wide | 2 |
| Leaves oblanceolate, elliptic or ovate to ± circular, <6 times long as wide | 4 |
| 2 | Leaves in clusters at each node; ovary 2- or 3-locular | Baeckea frutescens |
| Leaves solitary at each node; ovary always 2-locular
Back to 1 | 3 |
| 3 | Leaves 6–17 mm long, apex acute to acuminate | Baeckea linifolia |
| Leaves 3.3–5.8 mm long, apex obtuse
Back to 2 | Baeckea kandos |
| 4 | Leaves sessile | Baeckea brevifolia |
| Leaves shortly petiolate
Back to 1 | 5 |
| 5 | Leaves circular to broad-ovate, 1–1.5 times longer than wide | Baeckea imbricata |
| Leaves oblanceolate to elliptic, 1.5–6 times longer than wide
Back to 4 | 6 |
| 6 | Margins of leaves finely toothed throughout | Baeckea diosmifolia |
| Margins of leaves entire, or finely toothed near apex
Back to 5 | 7 |
| 7 | Leaves 2.3–5.3 mm wide, flat | Baeckea latifolia |
| Leaves 0.5–2.3 mm wide, concavo-convex
Back to 6 | 8 |
| 8 | Pedicels 0.4–1.6 mm long | 9 |
| Pedicels 1.6–2.5 mm long
Back to 7 | Baeckea utilis |
| 9 | Stamens 4–6; ovary and fruit 1-locular | Baeckea gunniana |
| Stamens 8–11; ovary 2-locular
Back to 8 | Baeckea omissa |
