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Key to Chionanthus

Oleaceae

Chionanthus

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1 Petals 7-15 mm long; anther tips mostly obtuse to rounded; drupes 2-2.5 cm; shrubs, 0.7-2 (-5) m tall; [endemic in Florida scrub]
1 Petals 15-25(-30) mm long; anther tips usually prolonged (or long ovate in C. retusus); drupes (1-) 1.5-2 cm long; shrubs or small trees, 2-4 (-20) m tall; [widespread in our area]
  2 Leaves 3-12 cm long, 2.0-6.5 cm wide, the leaf blade tips blunt, sometimes retuse or acute, the bases rounded to cuneate, rarely subcordate (the blades often somewhat orbicular in shape); flowering on new growth; [non-native, widely planted and potentially spreading locally]
  2 Leaves 6.0-20 cm long, to 14 cm wide, the leaf blade tips acute, mucronate, or obtuse, the bases typically cuneate to attenuate (the blades widely varying, often at least somewhat elliptic); flowering on last year's wood; [native, widespread and naturally-occurring]