In message , Des Higgins
writes
Ann Folkard is indeed a very good plant but it is unusual for hardy
geraniums in that it scrambles around. You end up with bits poking up
among neighbouring plants, up to a metre away. It is derived from a
cross between ?? G.psilostemum (I think; probably forgotten/got that
wrong) and G. procurrens (probably got that wrong too).

Nearly right. Yeo ("Hardy Geraniums") gives it as G. procurrens x
psilostemon. The identification of the pollen parent is based on
opportunity and appearance, rather than more direct evidence.
--
Stewart Robert Hinsley