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Key to Cestrum

Solanaceae

Cestrum

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1 Corolla lobes 4.0-4.5 mm long, erect to spreading; fruit ripening black
1 Corolla lobes 1.7-4.0 mm long, erect, spreading, or strongly reflexed; fruit ripening white or dark purple to black.
  2 Axillary buds often subtended by 1 or more minor leaves; fruit ripening dark purple or black; corolla lobes 1.7-2.3 mm long, strongly reflexed
  2 Axillary buds not subtended by minor leaves; fruit ripening white; corolla lobes 2-4.5 mm long, erect to spreading