I believe that you can add Lorelei to the list.
If your browser can translate Swedish to English (or your preferred language)...
https://pionisten.se/pioner/hy...
"Can be propagated by root fragments without eyes."
The site has some pretty good peony observations - it might be worth re-examining your peonies through this lens.
EDIT: The list, in text format. Hopefully I didn't miss anything.
From Allan Rogers book:
Athena
Birthday
Blaze
Burning Bright
Carina
Chalice
Claudia
Constance Spry
Coral Fay
Cytherea
Early Scout
Ellen Cowley
Eventide
Flame
Gold Glow
Laddie
Laura Magnuson
Legion of Honor
Lustrous
Mid May
Nosegay
Nova
Paladin
Paula Fay
Prairie Moon
Red Glory
Red Red Rose
Rose Garland
Rose Tulip
Roselette
Rosy Cheek
Royal Rose
Salmon Glow
Skylark
Sunlight
From Forum Members:
Burma Ruby
Circus Circus
Coral Charm
Coral Sunset
Diana Parks
Ellen Crowley
Joker
Lorelei
Pink Derby
Salmon Beauty
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