Description: Shrubs.
Leaves opposite, imbricate, small and narrow, dotted with oil glands.
Inflorescences axillary, consisting of 1–3 flowers on a common peduncle, often forming terminal clusters. Flowers 5- or rarely 6-merous, white, pink or yellow. Sepals small. Petals free. Stamens equal to the number of petals and opposite them, or twice as many. Ovary 1-locular, placentation apical, or subapical to lateral, ovules 2–6(–10), collateral, never superposed.
Fruit an indehiscent nut, scarcely enlarged from flower; seed usually solitary.
Distribution and occurrence: World: c. 22 species, endemic Australia. Australia: Qld, N.S.W., Vic., S.A., W.A.
Text by Peter G. Wilson
Taxon concept:
| | Key to the species | |
| 1 | Flowers 6-merous; ovules usually 8 | Micromyrtus hexamera |
| Flowers 5-merous; ovules 2 or 4 | 2 |
| 2 | Ovules 2; hypanthium less than 1 mm long | Micromyrtus minutiflora |
| Ovules 4–6; hypanthium usually more than 1 mm long
Back to 1 | 3 |
| 3 | Leaves with keel ciliate; margins of sepals fimbriate | Micromyrtus blakelyi |
| Leaves with keel glabrous; margins of sepals minutely toothed to entire
Back to 2 | 4 |
| 4 | Hypanthia flanked with 2 lateral pairs of ribs. | Micromyrtus ciliata |
| Hypanthia with 5–8 ribs, ± equally spaced.
Back to 3 | 5 |
| 5 | Hypanthia 5-ribbed. | 6 |
| Hypanthia up to 8-ribbed, ribs branching acutely towards the base of hypanthia.
Back to 4 | Micromyrtus striata |
| 6 | Leaves obovate, oblanceolate to oblong, 0.6–1.4 mm wide; flowers distinctly pedunculate. | Micromyrtus grandis |
| Leaves linear to oblanceolate, 0.5–0.8 mm wide; flowers ± sessile.
Back to 5 | Micromyrtus sessilis |
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