Prostanthera (mint-bushes; family Labiatae) A genus of shrubs that are usually glandular and yield aromatic oils. The leaves are opposite. The flowers are solitary and held in the axils of bracts or are borne in terminal panicles or racemes. The calyx is 2-lipped and persistent. The corolla is a short, wide tube with an erect upper lip which is often hooded and 2-lobed, and a lower lip of 3 spreading lobes. There are 4 stamens. The style is simple, the stigma bilobed. The fruit is a nutlet. There are about 50 species, all endemic (see ENDEMISM) to Australia.
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