It looks like Plectranthus parviflorus but this variable species is often difficult to distinguish from P. graveolens and P. suaveolens. I've recently been informed that Plectranthus parviflorus is now known as Coleus australis, according to a recently published paper on these plants. I've added Plectranthus sp. in the meantime, so that we can at least allocate this to a genus.