in article , Kay Easton at
wrote on 26/5/03 11:20 pm:

snip

I don't think this is the answer, but fwiw - Bupleurum has perfoliate
leaves. It's a compositae, so you wouldn't really expect purple flowers,
but then sea-holly is a compositae, so you never know...

No, it's not Bupleurum which always makes me think of a tiny Euphorbia!
--

Sacha
(remove the 'x' to email me)