Spiraea douglasii Hooker subsp. douglasii
Spiraea douglasii Hooker subsp. douglasii is a synonym of:
Spiraea douglasii Hooker var. douglasii, an accepted variety name sensu FNA Ed. Comm., 2014.
Spiraea douglasii Hooker subsp. douglasii is a synonym of:
Spiraea douglasii Hooker var. douglasii, an accepted variety name sensu FNA Ed. Comm., 2014.