About Glandora prostrata (Loisel.) D.C.Thomas
Glandora prostrata, commonly called shrubby gromwell, creeping gromwell or purple gromwell, shares these common names with the species Lithospermum purpurocaeruleum and Glandora diffusa. It is a Glandora species native to Portugal, Spain, and France. Two of its cultivars, 'Grace Ward' and 'Heavenly Blue', have received the Royal Horticultural Society's Award of Garden Merit.