Practice question

Diagrammatic convention developed by Eichler and widely adopted places floral whorls concentrically reflecting early organogenesis sequence and mature topography. Outermost circle represents bract and bracteoles with triangular marks, next inner alternating whorl calyx with often stippled sepal symbols, then corolla petals, followed by androecium stamens with anther cross-sections, and center-most region denotes gynoecium with ovary transverse section showing number of carpels, locules, septa and ovule placentation type. Central position emphasizes gynoecium being evolutionarily conserved and protected by outer whorls determining ovary position.