Broccolini.

Brassica oleracea italica x alboglabra = broccolini = Tenderstem (small branches with green flowering tops)

Brassica oleracea var. italica 'Purple Sprouting = purple sprouting broccoli (small branches with purple flowering tops)

About Sprouting Broccoli:
http://www.guardian.co.uk/lifeandstyle/ … g-broccoli

A large head of broccoli does indeed refer to the Calabrese variety. It is the more common variety of broccoli and you should be able to find these in most supermarkets and grocers. Purple sprouting broccoli is a seasonal broccoli available in the UK from January through to May – if you can find the seeds where you are in Australia then you must be able to find the actual vegetable in green grocers or supermarkets. It is very similar to tenderstem (broccolini) in size (long, thin stems, small head, leaves) except it has gorgeous purple leaves and head. When Jamie mentions ‘sprouting broccoli’ in his recipes he is referring to purple sprouting broccoli. If you can’t find the purple sprouting broccoli then the recipes will work just as well with broccolini or normal broccoli. Or if you wish you can substitute the broccoli for another type of green – such as beans, asparagus or even spinach. I hope that answers your question.

Jamie's Food Team wrote:

A large head of broccoli does indeed refer to the Calabrese variety. It is the more common variety of broccoli and you should be able to find these in most supermarkets and grocers. Purple sprouting broccoli is a seasonal broccoli available in the UK from January through to May – if you can find the seeds where you are in Australia then you must be able to find the actual vegetable in green grocers or supermarkets. It is very similar to tenderstem (broccolini) in size (long, thin stems, small head, leaves) except it has gorgeous purple leaves and head. When Jamie mentions ‘sprouting broccoli’ in his recipes he is referring to purple sprouting broccoli. If you can’t find the purple sprouting broccoli then the recipes will work just as well with broccolini or normal broccoli. Or if you wish you can substitute the broccoli for another type of green – such as beans, asparagus or even spinach. I hope that answers your question.

Thanks for the reply Food Team. I just picked up the 30 Min Meals dvd and checked the Rib-Eye stir fry recipe where Jamie uses "sprouting broccoli" (he also uses it in the Kinda Sausage Cassoulet in place of Tenderstem) and it doesn't look like purple sprouting broccoli. For one thing, it's green and is thicker. Are you sure they're supposed to be the same thing?

Also, thank you to everyone else who replied.