Originally Posted by Owdboggy

On the RHS website, I searched for collectors and got the up to date list:
https://www.rhs.org.uk/rhsplantfinde...References.pdf

Noted a certain JH in the listing was Halda, J.
Surfed on "halda paeonia" and got this:
Paeonia by Josef Halda With James Waddick
Quote
Although species of Paeonia are found in the wild throughout the northern Hemisphere, they are mainly associated
with Asia and Asian gardens.Josef Halda is one of the few botanists who have travelled to see every known peony species and subspecies in the wild, often in extremely remote areas
Josef J. Halda
I suspect you might find that plant in his book The Genus Paeonia