You selected Spiraea ariifolia var. discolor Torr. & A.Gray. This is an ambiguous synonym for:

Accepted scientific name:
Holodiscus dumosus (Nutt. ex Torr. & A.Gray) A.Heller (accepted name) 1 literature reference for Holodiscus dumosus (Nutt. ex Torr. & A.Gray) A.Heller
Synonyms: -
Infraspecific taxon: Holodiscus dumosus var. australis (A.Heller) F.A.Ley
Holodiscus dumosus var. glabrescens (Greenm.) C.L.Hitchc.
Holodiscus dumosus subsp. saxicola (A.Heller) Abrams
Holodiscus dumosus var. schaffneri (Rydb.) A.Heller
Holodiscus dumosus var. typicus F.A.Ley
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Rosales
Family Rosaceae
Genus Holodiscus
Distribution: -
Additional data: -
Source database: IOPI-GPC, 10.0, Aug 2007
Latest taxonomic scrutiny: R. Pankhurst, 2009
Online resource: -
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:2bb59a0e-60a7-102d-be47-00304854f810:ac2010