Julian Barnes wrote:

Can anyone tell me what the proper horticultural term is for the cluster
of flowers or buds

Umbril?

Applies to Queen Anne's Lace and Dill at least.

Google for pics to see it that's what you're seeing.


--
Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic
Zone 5/4 in upstate New York, 1420' elevation. NY WO G