Spiraea alba Du Roi. Narrowleaf Meadowsweet, Pipestem. Phen: Jun-Sep; Aug-Oct. Hab: Bogs, boggy streambanks, seepages. Dist: QC west to AB, south to NC, IN, and MO.

Origin/Endemic status: Native

Taxonomy Comments: There is considerable disagreement over whether S. alba and S. latifolia represent two species with some introgression in areas of overlap, two varieties, or a variable or clinal species.

Synonymy: = F, G, GrPl, Il, K3, K4, Pa, S, Tn, W, WV, Robertson (1974); = Spiraea alba Du Roi var. alba – C, FNA9, GW2, K1, Mi, NE, NY, RAB

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