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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Fabaceae

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1 Trees, shrubs, or woody vines; [subfamilies Caesalpinioideae, Mimosoideae, and Faboideae]
..2 Leaves 1-3-foliolate, or leaves reduced to flattened phyllodia or phyllodial spines.
..2 Leaves 4-many-foliolate.
....3 Leaves bipinnately compound
....3 Leaves pinnately compound.
......4 Leaves evenly 1-pinnate, with 1 or more lateral pairs of leaflets and 0 terminal leaflet
......4 Leaves oddly 1-pinnate, with a terminal leaflet
1 Herbs (including herbaceous vines).
........5 Leaves 4-many-foliolate.
..........6 Leaves palmately compound, with 4 or more leaflets; [subfamily Faboideae]
..........6 Leaves pinnately or bipinnately compound.
............ 7 Leaves bipinnately compound
............ 7 Leaves pinnately compound
............ ..8 Leaves evenly 1-pinnate, with 1 or more lateral pairs of leaflets and 0 terminal leaflet
........5 Leaves 0-3-foliolate ; [subfamily Faboideae].
............ ....9 Leaves 2-foliolate
............ ....9 Leaves 0, 1, or 3-foliolate.
............ ......10 Leaves unifoliolate, or with leaf or leaflet blades absent, replaced by a tendril (and with foliaceous stipules)
............ ......10 Leaves trifoliolate (plants with some upper stem or lower stem leaves unifoliolate but with other trifoliolate leaves should be keyed here).
............ ........11 Leaves palmately 3-foliolate (the petiolules of the 3 leaflets usually of similar length (if the apparent petiolule of the terminal leaflet is slightly longer, it does not have a joint between a rachis and the petiolule of the terminal leaflet)
............ ........11 Leaves pinnately 3-foliolate
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