Practice question

Floral formula abbreviation uses ∞ infinity symbol to represent indefinite or numerous parts exceeding ten, often spirally arranged or in multiple whorls showing variable number, examples including androecium of Ranunculaceae with many free stamens, corolla of Nymphaea, or gynoecium of Annonaceae with many carpels. Precise number indicated by numeral, fusion via brackets enclosing figure, absence via zero. Use of ∞ avoids counting numerous and variable parts, indicates polyandry or polycarpy characteristic of primitive Magnoliid lineages. Recognizing ∞ assists interpreting primitive versus derived floral evolution and family descriptions.