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Sanguisorba
See list of 3 species in this genus-
1a. Leaflets 5–20 mm long; flowers with 12 or more stamens and 2 carpels
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1b. Leaflets mostly 25–80 (–100) mm long; flowers with 4 stamens and 1 carpel
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2a. Sepals white, much shorter than the stamens; spikes 3–12 (–20) cm tall; filaments distally widened
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2b. Sepals purple to red-purple, equaling or slightly longer than the stamens; spikes 1–3 cm tall; filaments slender throughout
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Each photo represents one species in this genus.