It is one of my favourite herb. This year I bought the young plant with firm, somewhat woody stems and dark green foliage. The veins have a nice violet hue. I really don't know what species it is. It might be the one of the Asian kind.
As it grows, it forms a nice small shrub. The fragrance is pretty much the same as in other basils. Google search says it could be so calle Thai basil, but I am not quite sure. Anyway, it is really lovely addition to my herb garden.
I grew basil from seed as well. These are the seedling of sweet basil, both green and purple. I mostly use it fresh in various dishes.
PS. The heat persists. Sunday should bring us some rain and much lower temperatures. Who can wait for so long?