• Spiraea Linnaeus, 1753
• Spiraea acuminata Douglas ex Hook.
• Spiraea acuta hort.
• Spiraea acutifolia hort.
• Spiraea acutifolia Willd. (unaccepted)
• Spiraea adiantifolia hort.
• Spiraea adiantifolia hort. ex W. Baxter
• Spiraea aemiliana C.K. Schneid. (unaccepted)
• Spiraea aemula Zabel ex Koehne
• Spiraea aemulans Rehder accepted as Spiraea sargentiana Rehder
• Spiraea affinis R. Parker
• Spiraea aitchisonii Hemsl.
• Spiraea alaschanica Y.Z. Zhao & T.J. Wang
• Spiraea alba Du Roi
• Spiraea alba P. Watson
• Spiraea albiflora (Miq.) C.K. Schneid. (unaccepted)
• Spiraea albiflora (Miq.) Zabel (unaccepted)
• Spiraea alnifolia hort. ex Zabel
• Spiraea alpestris G. Don
• Spiraea alpina hort. ex Zabel accepted as Spiraea pikoviensis Besser
• Spiraea alpina hort. Paris.
• Spiraea alpina Korsh.
• Spiraea alpina Pall.
• Spiraea altaica Pall.
• Spiraea altaiensis Laxm.
• Spiraea amabilis Koidz. accepted as Spiraea blumei G. Don
• Spiraea ambigua Pall.
• Spiraea amena Raf.
• Spiraea americana Michx.
• Spiraea amoena Spae accepted as Spiraea fastigiata Wall. ex C.K. Schneid.
• Spiraea amurensis Maxim. accepted as Physocarpus amurensis (Maxim.) Maxim.
• Spiraea anatolica Hausskn. ex C.K. Schneid.
• Spiraea angulata Fritsch ex C.K. Schneid. (unaccepted)
• Spiraea angustifolia Dippel accepted as Spiraea fulvescens Dippel
• Spiraea angustifolia Mill.
• Spiraea angustifolia Otto & A. Dietr.
• Spiraea angustiloba Turcz.
• Spiraea angustiloba Turcz. ex Fisch., C.A. Mey & Avé-Lall. accepted as Filipendula angustiloba (Turcz. ex Fisch., C.A. Mey & Avé-Lall.) Maxim.
• Spiraea anomala Batalin
• Spiraea aquilegifolia Pall.
• Spiraea arbuscula Greene (unaccepted)
• Spiraea arctica hort. ex Lavallée
• Spiraea arcuata Hook. f.
• Spiraea arenaria Y.Z. Zhao & T.J. Wang accepted as Spiraea hailarensis Liou
• Spiraea argentea Benth.
• Spiraea argentea hort. accepted as Spiraea canescens D. Don
• Spiraea argentea K. Koch (unaccepted)
• Spiraea argentea L. f.
• Spiraea argentea W. Baxter ex Loudon
• Spiraea argunensis Ledeb.
• Spiraea argunensis Ledeb. ex Fisch. & C.A. Mey.
• Spiraea arguta Hoffmanns.
• Spiraea arguta Zabel
• Spiraea arunachalensis Panigrahi & K.M. Purohit
• Spiraea aruncus Hook. f.
• Spiraea aruncus Ledeb.
• Spiraea aruncus Linnaeus accepted as Aruncus dioicus (Walter) Fernald
• Spiraea aruncus Thunb.
• Spiraea assimilis Zabel
• Spiraea assurgens (M. Vilm. & Bois) Bean
• Spiraea astilboides T. Moore
• Spiraea atemnophylla H. Lév. accepted as Spiraea veitchii Hemsl.
• Spiraea aubifolia hort. ex Zabel
• Spiraea baldshuanica B. Fedtsch.
• Spiraea banatica Janka accepted as Spiraea media Schmidt
• Spiraea barbata Wall.
• Spiraea barbata Wall. ex Cambess.
• Spiraea beauverdiana auct. accepted as Spiraea stevenii (C.K. Schneid.) Rydb.
• Spiraea beauverdiana C.K. Schneid. (unaccepted)
• Spiraea beauverdiana Hultén
• Spiraea belgica Dumort.
• Spiraea bella Sims
• Spiraea bellardii hort.
• Spiraea belloides hort. accepted as Spiraea japonica L. f.
• Spiraea bernhardii hort. angl. ex Zabel
• Spiraea besseriana Sweet
• Spiraea bethlehemensis hort. ex K. Koch
• Spiraea bethlemensis hort. ex Wenz.
• Spiraea betulaefolia P. Watson
• Spiraea betulifolia Hook.
• Spiraea betulifolia Pall.
• Spiraea betulifolia Pursh
• Spiraea billardieri hort. ex Zabel
• Spiraea billardii auct. accepted as Spiraea pseudosalicifolia Silverside
• Spiraea billardii Dippel
• Spiraea billardii Hérincq
• Spiraea billardii hort. ex K. Koch
• Spiraea billardii Meehan
• Spiraea billiardii (Zabel) J. Duvign.
• Spiraea billiardii Hérincq
• Spiraea blanda Zabel
• Spiraea blumei G. Don
• Spiraea bodinieri H. Lév.
• Spiraea boissieri C.K. Schneid.
• Spiraea boursieri Carrière
• Spiraea brachybotrys Lange
• Spiraea bracteata Hook. f. accepted as Spiraea nipponica Maxim.
• Spiraea bracteata Raf.
• Spiraea bracteata Zabel accepted as Spiraea nipponica Maxim.
• Spiraea brahuica Boiss.