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Key to Filipendula

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1 Leaves with (8-) 10-25 pairs of lateral leaflets; plants usually 5-8 (-10) dm tall.
1 Leaves with 1-5 pairs of lateral leaflets; plants usually 12-25 dm tall.
  2 Lateral leaflets lobed and toothed; flowers pink; fruit straight; terminal leaflet with 7-9 palmate lobes; rootstock with long subterranean runners; [native plant of wetlands, also sometimes cultivated]; [section Albicoma]
  2 Lateral leaflets merely coarsely toothed; flowers white; fruit twisted; terminal leaflet with 3-5 palmate lobes; rootstock short, without runners; [introduced species, sometimes escaped]; [section Filipendula]