I've never found Google etc to be of much use, in fact l don't think l've ever had a correct id 😁. You've definitely come to the right place for advice
That's cos a dahlia can cross pollinate with the next dahlia and make a spectacular new dahlia or a duffer. They can have many different flower forms - cacti, semi cacti, pompom, ball, collarette, single, peony, dinner plate, orchid, waterlily.............
Leaves can be green, bronze or purple. They can be small, medium or large plants.
Flower colours can be white through cream, yellow ad all shades of orange pink and red to almost black. They can be multi-coloured, bi-coloured and graduated.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
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They're dahlias, possibly Bishop of Llandaff.
You've definitely come to the right place for advice
https://www.rhs.org.uk/plants/details%3Fplantid%3D621
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Leaves can be green, bronze or purple. They can be small, medium or large plants.
Flower colours can be white through cream, yellow ad all shades of orange pink and red to almost black. They can be multi-coloured, bi-coloured and graduated.