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#gynoecium

4 public questions tagged with this topic.

In a floral diagram, the gynoecium is represented in the

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.

Ref: Ronse De Craene 2010 Floral Diagrams central gynoecium; Simpson

Which letter denotes gynoecium in a floral formula?

Conventional floral formula notation letters derive from classical organ terminology internationally standardized: K for calyx meaning sepals from French Kalyx, C for corolla petals, P for perianth when sepals and petals undifferentiated as tepals typical of monocots, A for androecium stamens male parts, G for gynoecium carpels female parts. Numerals denote merosity per whorl, parentheses indicate connation, line beneath or above G denotes ovary position. Hence G unequivocally represents innermost whorl with carpels and ovules, superior or inferior indicated respectively.

Ref: Judd et al. Plant Systematics, floral whorls K C A G; Ronse De Craene 2010