Canada's Plant Hardiness Site

Lamiaceae (or Labiatae) Mint family
Caryopteris hispida var. fertilis A.Simmonds ex Anon. 1933, non A. Simmonds ex Rehder 1940 (V. incana x V. mongholica)
En: blue spiraea, Arthur Simmonds bluebeard;
Fr: barbe bleue, caryopteris