are honey bees into California lilac (Ceanothus)?

[BayHighlandBees]

I've seen California lilac listed in many places as bee friendly. They're massive bushes full of dark blue flowers and they're in bloom right now. While I was looking at a grove of these in Sausalito I saw tons of bumble bees in them but no honey bees. Is my observation accurate, or are the California lilacs good for honey bees?

[odfrank]

There are a lot of different varieties in a lot of different climates, so I am not sure. Not so much that I have seen.