Holodiscus discolor var. glabrescens Holodiscus discolor var. cedrorum Holodiscus discolor var. discolor Holodiscus discolor var. microphyllus
Spiraea ariifolia var. discolor Schizonotus argenteus var. discolor Schizonotus discolor var. discolor Spiraea discolor var. dumosa Spiraea dumosa Schizonotus discolor Spiraea discolor Holodiscus dumosus Sericotheca discolor Holodiscus discolor var. dumosus
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024