How many types of hebes are there?

Do you mean genus? And, yes, there are shade loving genus.

Varieties of Hebe? Certainly in the hundreds - most prefer an open situation with sun, but some will do okay light shade, most will do well in partial shade. Many are not fully hardy in the UK.

You can find details of the Hebe society on line. I have found them very happy to give advice and most helpful.

Ah you've changed your question I see...