This name is a synonym of Fragaria moschata Duchesne ex Weston.
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym (record 26601) with original publication details: Institutiones rei herbariae Institutiones rei herbariae; 1766 179 1766.
This name record (from RJP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Fragaria grandiflora in version 1 of The Plant List.