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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 Manihot

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1 Shrubs or trees, 1-6 (-7) m tall; inflorescences paniculate; [exotic, e. TX eastwards].
..2 Leaf lobes 3-7, each broadest toward the tip, narrowing evenly toward the acuminate apex; calyx of male flowers < 10 mm long; fruit wing-angled
..2 Leaf lobes 9-13, each constricted near the tip and then broadening again; calyx of male flowers 12-15 mm long; fruit not winged
1 Herbs or shrubs, < 1.5 m tall; inflorescences racemose; [native, se. and s. TX in our region].
....3 Leaf lobe apices acuminate
....3 Leaf lobe apices acute, obtuse, or rounded
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