I’ve put one of our Dahlias into Mum’s green glass.
To keep the flower in place I have used one of Mum’s old flower holders, very heavy and spiky and made of lead I think. It has the manufacturer’s name on the back. I looked it up and Pollards are, still, florists and hopefully, the same firm. I have written to them to see if they can help with dating and the proper name.