I saw this in the grocery store and had to buy it. It is flowering kale and it is lovely. Here it is from the side:
As far as ornamental greens go, this one is both a pretty border for the garden and a practical vegetable to grow. Kale is very versatile. You can fry it, roast it, boil it, or–in this case, at least, since it is unusually tender for kale–eat it raw. This particular kale tastes like cabbage, which makes sense because kale is closely related to cabbage.
Here’s a great recipe for kale from Orangette: Boiled Kale with a Fried Egg and Toast.