About Acaena inermis Hook.fil.
Acaena inermis Hook.fil., commonly called the spineless acaena, is a species of flowering plant in the Rosaceae family. It is endemic to New Zealand and has been introduced to Great Britain. Other common names for this plant include spineless bidibid and blue mountain bidibid. It is a mat-forming perennial that is useful as a ground cover. Its cultivar 'Purpurea' is widely available from commercial plant suppliers.