Agrimonia

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  A. eupatoria

  1a. Hypanthium densely and evidently hirsute in and between the furrows; petals 4–6 mm long
• See list of 6 species in 1b
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  1b. Hypanthium glabrous or stipitate-glandular, sometimes with minute, eglandular hairs in the furrows; petals 2–5 mm long
  • See list of 3 species in 2a
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    2a. Axis of raceme with abundant stipitate glands [Fig. 825]; leaflets with small, glandular dots on the abaxial surface
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      A. parviflora

      3a. Larger leaf blades with 11–23 leaflets excluding the smaller leaflets distributed along the leaf rachis; axis of raceme with dense, short eglandular hairs in addition to the glandular ones and occasional long, eglandular ones
    • See list of 2 species in 3b
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      3b. Larger leaf blades with 3–9 leaflets excluding the smaller leaflets distributed along the leaf rachis; axis of raceme either lacking eglandular hairs or with longer, ascending to spreading, eglandular hairs
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        A. gryposepala

        4a. Axis of raceme with scattered, divaricately spreading eglandular hairs 
0.5–2 mm long [Fig. 825]; hypanthium 3–5 mm tall; outer series of hooked bristles 
on hypanthium wide-spreading [Fig. 825]; roots all fibrous
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        A. rostellata

        4b. Axis of raceme with sparse (sometimes very sparse), ascending eglandular hairs 0.5–1 mm long; hypanthium 2–2.5 mm long; outer series of hooked bristles on hypanthium ascending to erect [Fig. 826]; some roots tuberous thickened
  • See list of 3 species in 2b
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    2b. Axis of raceme without stipitate glands [Fig. 826]; leaflets without glandular dots on the abaxial surface or with them in A. striata
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      A. striata

      5a. Leaflets with small, glandular dots on the abaxial surface; hypanthium 4–5 mm long; roots all fibrous
    • See list of 2 species in 5b
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      5b. Leaflets without glandular dots on the abaxial surface (or these obscure); hypanthium 2–3 mm long; some roots tuberous-thickened
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        A. microcarpa

        6a. Leaves with 3 or 5 leaflets excluding the smaller leaflets distributed along the leaf rachis; leaflets rounded at apex; hypanthium 2–2.5 mm long; pubescence of stem wide-spreading, 3–4 mm long
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        A. pubescens

        6b. Larger leaves with 5–13 leaflets excluding the smaller leaflets distributed along the leaf rachis; leaflets acute to obtuse at the apex; hypanthium 2.5–3 mm long; pubescence of stem loosely ascending or incurved, 2–3 mm long

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