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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 Colubrina

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1 Leaf margins crenate-serrate.
..2 Leaves evergreen, both surfaces glabrous or glabrescent; shrubs erect to scrambling and clambering, 1.5-8 m tall or long; [FL]
..2 Leaves deciduous, the lower surface sericeous or sericeous-tomentose; shrubs erect, to 3 m tall; [TX].
....3 Leaf blades (3-) 4-12 (-23) cm long, with 40-100 teeth per side
....3 Leaf blades 1-3 (-4) cm long, with 2-20 teeth per side
1 Leaf margins entire; leaf venation pinnate, with 4-12 prominent secondary veins on each side of the midvein; plant an erect shrub or small tree.
......4 Secondary veins nearly straight and parallel, 6-12 on either side of the midvein; leaf apex obtuse to rounded; inflorescences 20-50 (-70)-flowered; peduncles 8-15 mm long
......4 Secondary veins curved, arcing towards the margin, 4-9 on either side of the midvein; leaf apex acute to acuminate; inflorescences 8-30 flowered; peduncles 1-10 mm long.
........5 Leaves tomentose below, especially on the veins; leaves glossy above; peduncles (3-) 5-10 mm long
........5 Leaves glabrous or nearly so below; leaves dull or matte above; peduncles 1-7 mm long
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