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Wisteria
See list of 3 species in this genus-
1a. Ovary and legume glabrous; pedicels 5–10 (–15) mm long; corollas 15–20 mm long; legumes 10–12 mm wide
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1b. Ovary minutely villous and legume initially villous, retaining some pubescence at least along one or both sutures; pedicels mostly 15–20 mm long; corollas 15–25 (–27) mm long; legumes 20–25 mm wide
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2a. Leaves with 13–19 leaflets; corollas 15–20 mm long; racemes 20–50 (–70) ×6–7 cm, with flowers developing from base to apex
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2b. Leaves with 7–13 leaflets; corollas 20–25 (–27) mm long; racemes 10–20 (–30) ×7–9 cm, with flowers opening nearly simultaneously
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Each photo represents one species in this genus.