A single female poinsettia flower with stigma, style, and ovary can be seen emerging from its involucre (cluster of bracts fused together). The involucre also has a nectar gland emerging from it (that look like two lips). The entire inflorescence (involcure and female flower) is called a cyanthium. The red leaves surrounding the inflorescences (mostly out of focus, except for the one next to the female flower) are bracts.
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