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

Accepted scientific name:
Holodiscus discolor (Pursh) Maxim. (accepted name) 1 literature reference for Holodiscus discolor (Pursh) Maxim.
Synonyms: -
Infraspecific taxon: Holodiscus discolor proles ariifolius (Sm.) Asch. & Graebn.
Holodiscus discolor var. ariifolius Jeps.
Holodiscus discolor var. delnortensis F.A.Ley
Holodiscus discolor var. dumosus Dippel
Holodiscus discolor var. dumosus Maxim. ex J.M.Coult.
Holodiscus discolor proles eudiscolor Asch. & Graebn.
Holodiscus discolor subsp. franciscanus (Rehder) A.E.Murray, nom. superfl.
Holodiscus discolor subsp. franciscanus (Rydb.) R.L.Taylor & MacBryde
Holodiscus discolor var. franciscanus (Rydb.) Jeps.
Holodiscus discolor var. glabrescens (Greenm.) Jeps.
Holodiscus discolor subsp. microphyllus (Rydb) A.E.Murray, nom. inval.
Holodiscus discolor var. microphyllus (Rydb.) Jeps.
Holodiscus discolor 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:2bcbf696-60a7-102d-be47-00304854f810:ac2010