Centripetal arrangement of whorls in floral diagram is
When authentic floral diagram drawn following developmental observations, organ initiation proceeds centripetally meaning progression from outside toward inside following acropetal order on determinate floral apex where growth terminates with carpel primordia. Sequence begins with calyx as first initiated sepals forming outermost whorl, then corolla petals, then androecium stamens, finally gynoecium carpels occupying innermost central summit. This centripetal arrangement reflects genetic program governed by ABCDE MADS-box model organ identity genes with overlapping expression domains. Alternat
Ref: Endress 1994 Floral development; Ronse De Craene 2010 Centripetal initiation; ABC model
