Hello Kinder Trauma! Thanks for all the good stuff.
I have a scene in my mind from when I was a wee lad in the early seventies and I have no idea from which film it plays. Not much to go on. This is what I see in my mind's eye: Color film. Maybe a HAMMER feel to it. A greenhouse/garden inside of a mansion. I think the decor might have feet a little Victorian or Old South. In the greenhouse are these flowers with small, proboscis like stigma or stamen which are bloody red drippy. These things drank blood. A couple of people are standing around and talking about the flowers, maybe getting ready for a feeding and a murder.
That is all I can remember.